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Knob Screws（Polygonal Shape, Type：Heptagonal Shape）

Knob Screws are utilized in various applications to enable manual control, adjustment, or fastening in a wide range of applications. They have widespread applications across diverse industries such as in automation systems. In various manufacturing industries, for example, food and pharmaceutical industries, and electronics industries.
When selecting a Knobs Screws, it is crucial to consider factors, including size, shape (eg., round, mushroom, ball, T- shaped and polygon shape), material (eg., plastic, stainless steel, aluminum and so on.) and mounting type for example threaded and tapped. These considerations are crucial for ensuring the production of high-quality products. We highly recommend reputable brands such as MISUMI, ESCO and KONISHI, as well as cost-effective options from MISUMI ECONOMY.
Take advantage of the convenience of FREE SHIPPING and NO MINIMUM ORDER on knob screw. Should you have any doubts or require assistance in choosing the right product, our experts are readily available to provide advice and guidance.

Configure

Specification/Dimensions

Mounting Section Dia. d (mm) or Nominal Dia.
1/2

1/4

3

M3

3/8

4

M4

5

M5

5/16

6

M6

6.1

7

8

M8

9

10

M10

12

M12

M14

16

M16

20

M20

M24
Drawing

Clear

Mounting Section Type
- Threaded
- Threaded (Stepped)
- Tapped
- Tapped (Stepped)
- Round Bore
- Press Fit
- Others
Clear

Mounting Section, Length L(mm)
2

3

4

5

6

6.5

6.6

7

7.2

7.5

8

8.4

8.5

8.8

9

9.1

9.5

9.6

10

10.5

10.7

11

11.5

11.9

12

12.5

13

13.4

13.5

13.8

14

14.5

14.6

15

16

17

18

18.4

18.8

19

19.6

20

21

22

23

23.4

23.8

24

24.6

25

26

26.5

27

28

28.4

28.5

28.8

29

30

31

32

33

34

35

36

37

38

39

39.5

40

42

44

45

50

54.5

55

60

70

80
Drawing

Clear

Main Body, Type
- Round Shape
- Polygonal Shape
- T Shape
- Wing Shape
- Special Shape
- Related Components
Images

Clear

Main Body Material
- Stainless Steel
- Steel
- Aluminum
- Nylon
- Phenol
- ABS
- Polyacetal
- Brass
- Polyamide
- Polypropylene
- Melamine Plastic
- EPDM
- Others
- Vinyl
- Cast Iron
- Plastic_
Clear

Round Shape, Type
- Cylindrical Shape
- Clamp Shape
- Mushroom Shape
- Rose Shape
- Volume Knob Shape
- Balls
Images

Clear

Mounting Section, Material
- Stainless Steel
- Steel
- Aluminum
- Nylon
- Phenol
- Polyacetal
- Brass
- Tinned Bronze
- Others
- Vinyl Chloride
Clear

Threaded End Machining
- None
- Spherical
- With Pad
- Cone Point
Clear

Set Screw Flat Machining
- None
- Provided (1 Place)
- Provided (2 Places)
Images

Clear

Side Machined
- Not Provided
- Knurling
- Checker Knurled
- Dimple
- Diamond Cut
Images

Clear

Polygonal Shape, Type
- Triangular Shape
- Cross Shape
- Pentagon Shape
- Hexagonal Shape
- Heptagonal Shape
- Octagonal Shape
- Star-shaped
Images

Clear

T Shape, Type
- Bar
- Wing
Images

Clear

Additional Function
- Not Provided
- With Hex Socket
- With Cross Recess
- With Slitting
- Washer Integrated
- Fall-off Prevention
- Axial Bearing Built-in
- Cylindrical (With Counterbored Hole)
- Lock
- With Scale
- Others
Images

Clear

Tapped, Round Hole Machining
- Blind Bore
- Through
- Reamer Finishing
Images

Clear

Main Body, Surface Treatment
- None
- Trivalent Chromate
- Black Oxide
- Tumble Polishing
- Coating
- Shot Blasting
- Buff Polished + Chrome Plating
- Brushed Finishing
- Chrome Plating
- Electroless Nickel Plating
- Electrolytic Polishing
- Buffed
- Anodize
- Others
- Gloss chrome plated
Clear

Mounting Section, Surface Treatment
- None
- Trivalent Chromate
- Black Oxide
- Nitriding Treatment
- Nickel Plating
- Bright Chrome Plating
- Zinc Plating
- Chrome Plating
- Others
- Chromate
Clear

Brand	(3) (2) DAIMARU BYORA SEISAKUSHO (8) ESCO (0) GOSHO WORKS (0) HALDER (0) HILOGIK (0) IMAO CORPORATION (3) KONISHI (5) KONOE (0) KYOWA (0) MITSUBOSHI CI (1) NBK (3) RICHENGINEERING (0) RS Pro (0) SHIMIZU (0) SUGATSUNE (0) SUNCO (0) TAKIGEN (0) TRUSCO (0)
Filter By	All Sale Items
CAD	2D 3D
Days to Ship	All Same day 1 Day(s) or Less 3 Day(s) or Less 4 Day(s) or Less 5 Day(s) or Less Others

23 items

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: 30; 60; 90

Compare

Until 30/04/2024

Plastic Knobs/Seven Lobed Knobs

MISUMI

Plastic Knobs/Seven Lobed Knobs
Knobs Screws are commonly used in various applications to secure, adjust, and control different mechanical devices. They offer a wide variety of sizes to choose from.
[Feature]
● Shape : Seven Lobed Knobs
● Thread Size : M5, M6, M8 and M12
● Material :
Knobs - Nylon 6 (Mat Black)
Screws - Male Thread (SWCH10R), Female Thread (Brass )
[Application]
Knob Screws are commonly used in fastening, assembly, adjustment, clamping and so on

From: ฿ 54.60
Special Price
Days to Ship: Same day

Same day

Economy series

Compare

MiSUMi C-VALUE

Heptagonal Knobs

MiSUMi C-VALUE

Heptagonal Knobs
Knobs Screws are an economy item, The price is cheaper than the MISUMI standard product. They offer a wide variety of sizes to choose from.
[Feature]
● Shape : Heptagonal Knobs (Seven Lobed Knobs)
● Thread Size : M10 and M12
● Material :
Knobs - Phenolic Resin
Screws - Q235
[Application]
Knobs Screws are commonly used in fastening, assembly, adjustment, clamping and so on

From: ฿ 70.46
Days to Ship: Same day

Same day

Compare

Until 30/04/2024

Seven Lobed Knob_KSM/KSF

NBK

The septogon is an ideal form for the human hand.

From: ฿ 82.41
Special Price
Days to Ship: Same day

Same day

Compare

Grub Screw Knob GSN

KONISHI

Grub Screw Knob GSN
Knobs Screws are commonly used in various applications to secure, adjust, and control different mechanical devices. They offer a wide variety of sizes to choose from.
[Feature]
● Shape : Seven Lobed Knobs
● Thread Size : M5, M6, M8, M10 and M12
● Material : SUM22L
Knob - Phenolic Plastic Black
Screw : SUM22L
[Application]
Knob Screws are commonly used in fastening, assembly, adjustment, clamping and so on

From: ฿ 186.27
Days to Ship: 3 Day(s)

3 Day(s)

Compare

Seven Lobed Knob - SLK, SLK-Sus

KONISHI

Matte black nylon (glass fiber reinforced) resin male thread. The thread is made of steel, the surface is trivalent chromate treated and made of stainless steel. Operating temperature max80° C min-20° C

From: ฿ 86.95
Days to Ship: 3 Day(s)

3 Day(s)

Compare

Until 30/04/2024

Stainless-Steel Hand Knob (HK-N-SUS)

IMAO CORPORATION

Stainless-steel hand knob ideal for use with medical equipment and food processing machines.
[Features]
· Excellent corrosion resistance.
· 3 types of product mounting specification available: reamed, tapped and tapped through.
· Reamed and tapped types do not have a recess on the top and are ideal for food processing machines and cleaning machines.
[Applications]
· Ideal for knob-operated parts of food processing machines and cleaning machines, etc.

From: ฿ 929.53
Special Price
Days to Ship: Same day

Same day

Economy series

Compare

MiSUMi C-VALUE

Heptagonal Lob Knob Female Thread

MiSUMi C-VALUE

This is an economy item, The price is cheaper than the MISUMI standard product.

From: ฿ 70.46
Days to Ship: Same day

Same day

Compare

Until 30/04/2024

Aluminum Hand Knob (ALHK)

IMAO CORPORATION

[Features]·Easy grip handle knob. [Materials]·Made of Aluminum.

From: ฿ 702.68
Special Price
Days to Ship: Same day

Same day

Compare

Seven Lobed Knob, SLK-T

KONISHI

It is made of matte black nylon (glass fiber reinforced) resin. Operating temperature max80° C min-20° C

[Features]
· Made of matte black nylon (glass fiber reinforced) resin.
· Operating temperature is max80° C, min-20° C

From: ฿ 98.13
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Quick Star Knob QSK

KONISHI

After tilting the screw to the boss center hole and inserting it, screw the screw in vertically. Plastic knob that helps by shortening the time to tighten all the screws.

From: ฿ 781.69
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Until 30/04/2024

Quick Seven Lobed Knob_KSQ

NBK

Even long screws can be tightened quickly.

From: ฿ 639.77
Special Price
Days to Ship: Same day

Same day

Compare

Until 30/04/2024

Seven Lobed Knob_KTF/KTR

NBK

Hands-friendly 7-sided shape. It is easy to grasp.

From: ฿ 130.58
Special Price
Days to Ship: Same day

Same day

Compare

Seven Lobed Knob SLK-NT

KONISHI

It is made of matte black nylon (glass fiber reinforced) resin. Operating temperature max80° C min-20° C

From: ฿ 161.49
Days to Ship: 3 Day(s)

3 Day(s)

Compare

White, Flower Nut No. 3【400 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses BSBM.

From: ฿ 11,535.48
Days to Ship: 12 Day(s)

12 Day(s)

Compare

Eagle Star Knob Bolt, 7-Lobe【20 Pieces Per Package】

MITSUBOSHI CI

[Features]·Received the 2008 Good Design Award. ·Contains 20 pcs.

From: ฿ 755.43
Days to Ship: 6 Day(s)

6 Day(s)

Compare

Flower Bolt, No. 1, White【500-1,200 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Low cost due to creation in a collection mold. Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses SWRM-10.

From: ฿ 3,251.61
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Flower Bolt Number 1 Black【500-1,200 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

A knob formed into an elegant petal design.
[Feature]
· The product is low cost due to creation in a collection mold.
· The head part is a high strength polyamide resin, and the thread section uses SWRM-10.
[Applications]
· Ideal for light electrical equipment, machines, metal goods and others.

From: ฿ 3,251.61
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Flower Bolt, No. 2, White【400-500 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Low cost due to creation in a collection mold. Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses SWRM-10.

From: ฿ 2,322.58
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Flower Bolt Number 2 Black【350-500 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

From: ฿ 2,322.58
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Flower Bolt, No. 3, White【200-300 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Low cost due to creation in a collection mold. Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses SWRM-10.

From: ฿ 2,129.03
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Flower Bolt, No. 3, Black【200-300 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Low cost due to creation in a collection mold. Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses SWRM-10.

From: ฿ 2,174.80
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Black Flower Nut, No. 3【400 Pieces Per Package】

DAIMARU BYORA SEISAKUSHO

Elegant petal design. The head part is a high strength polyamide resin, and the thread part uses BSBM.

From: ฿ 8,361.29
Days to Ship: 5 Day(s)

5 Day(s)

Compare

Lobe Nut

IMAO CORPORATION

[Features]·Low profile resin knob. ·Main body type is polygon (heptagon).

From: ฿ 379.15
Days to Ship: 6 Day(s)

6 Day(s)


Brand
Product Series
CAD
From
Days to Ship
Specifications
Mounting Section Dia. d (mm) or Nominal Dia.
Mounting Section Type
Mounting Section, Length L(mm)
Main Body, Type
Main Body Material
Round Shape, Type
Mounting Section, Material
Threaded End Machining
Set Screw Flat Machining
Side Machined
Polygonal Shape, Type
T Shape, Type
Additional Function
Tapped, Round Hole Machining
Main Body, Surface Treatment
Mounting Section, Surface Treatment

	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare Until 30/04/2024	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare
Brand	MISUMI	MiSUMi C-VALUE	NBK	KONISHI	KONISHI	IMAO CORPORATION	MiSUMi C-VALUE	IMAO CORPORATION	KONISHI	KONISHI	NBK	NBK	KONISHI	DAIMARU BYORA SEISAKUSHO	MITSUBOSHI CI	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	DAIMARU BYORA SEISAKUSHO	IMAO CORPORATION
Product Series	Plastic Knobs/Seven Lobed Knobs	Heptagonal Knobs	Seven Lobed Knob_KSM/KSF	Grub Screw Knob GSN	Seven Lobed Knob - SLK, SLK-Sus	Stainless-Steel Hand Knob (HK-N-SUS)	Heptagonal Lob Knob Female Thread	Aluminum Hand Knob (ALHK)	Seven Lobed Knob, SLK-T	Quick Star Knob QSK	Quick Seven Lobed Knob_KSQ	Seven Lobed Knob_KTF/KTR	Seven Lobed Knob SLK-NT	White, Flower Nut No. 3【400 Pieces Per Package】	Eagle Star Knob Bolt, 7-Lobe【20 Pieces Per Package】	Flower Bolt, No. 1, White【500-1,200 Pieces Per Package】	Flower Bolt Number 1 Black【500-1,200 Pieces Per Package】	Flower Bolt, No. 2, White【400-500 Pieces Per Package】	Flower Bolt Number 2 Black【350-500 Pieces Per Package】	Flower Bolt, No. 3, White【200-300 Pieces Per Package】	Flower Bolt, No. 3, Black【200-300 Pieces Per Package】	Black Flower Nut, No. 3【400 Pieces Per Package】	Lobe Nut
CAD	2D / 3D	2D / 3D	2D / 3D	2D	2D	2D / 3D	2D / 3D	2D / 3D	2D	2D	2D / 3D	2D / 3D	2D
From	฿ 54.60 Special Price On Sale Until 30/04/2024	฿ 70.46	฿ 82.41 Special Price On Sale Until 30/04/2024	฿ 186.27	฿ 86.95	฿ 929.53 Special Price On Sale Until 30/04/2024	฿ 70.46	฿ 702.68 Special Price On Sale Until 30/04/2024	฿ 98.13	฿ 781.69	฿ 639.77 Special Price On Sale Until 30/04/2024	฿ 130.58 Special Price On Sale Until 30/04/2024	฿ 161.49	฿ 11,535.48	฿ 755.43	฿ 3,251.61	฿ 3,251.61	฿ 2,322.58	฿ 2,322.58	฿ 2,129.03	฿ 2,174.80	฿ 8,361.29	฿ 379.15
Days to Ship	Same day	Same day	Same day	3 Day(s)	3 Day(s)	Same day	Same day	Same day	5 Day(s)	4 Day(s)	Same day	Same day	3 Day(s)	12 Day(s)	6 Day(s)	5 Day(s)	5 Day(s)	5 Day(s)	5 Day(s)	5 Day(s)	5 Day(s)	5 Day(s)	6 Day(s)
Specifications
Mounting Section Dia. d (mm) or Nominal Dia.	5 ～ 12	M10 ～ M12	M5 ～ M12	M5 ～ M12	M5 ～ M12	M6 ～ M12	M10 ～ M12	8 ～ M16	M5 ～ M12	8 ～ 12	M8 ～ M12	6 ～ M12	M6 ～ M12	M6	8	M3 ～ M4	M3 ～ M4	M4 ～ M5	M4 ～ M5	M5 ～ M6	M5 ～ M6	M4 ～ M6	M8
Mounting Section Type	Threaded / Tapped	Threaded (Stepped)	Threaded / Tapped	Threaded (Stepped)	Threaded (Stepped)	Tapped / Round Bore	Tapped (Stepped)	Tapped / Round Bore	Tapped (Stepped)	Others	Tapped	Tapped / Round Bore	Tapped (Stepped)	Tapped	Threaded	Threaded	Threaded	Threaded	Threaded	Threaded	Threaded	Tapped	Tapped
Mounting Section, Length L(mm)	10 ～ 55	25 ～ 30	9.5 ～ 60	10 ～ 80	10 ～ 60	15 ～ 40	17 ～ 21	15 ～ 28	8.5 ～ 23	26 ～ 42	26 ～ 42	12 ～ 22	11 ～ 20	2	30	6 ～ 28	6 ～ 28	6 ～ 20	6 ～ 28	9 ～ 27	9 ～ 27	-	-
Main Body, Type	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape	Polygonal Shape
Main Body Material	Nylon	Phenol	Nylon	Phenol	Nylon	Stainless Steel	Phenol	Aluminum	Nylon	Nylon	Nylon	Nylon	Nylon	Stainless Steel	Steel	-	-	-	-	-	-	-	Polyamide
Round Shape, Type	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mounting Section, Material	Steel / Brass	Steel	Stainless Steel / Steel	Steel	Stainless Steel / Steel	Stainless Steel	Brass	Aluminum	Steel	Steel	Steel	Stainless Steel / Steel	Steel	-	-	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Brass
Threaded End Machining	None	-	None	None	None	-	-	-	-	-	-	-	-	-	None	None	None	None	None	None	None	-	-
Set Screw Flat Machining	None	-	-	None	None	None	-	None	None	None	-	None	None	-	-	-	-	-	-	-	-	-	-
Side Machined	-	-	-	Not Provided	Not Provided	-	-	-	Not Provided	Not Provided	-	-	Not Provided	-	Not Provided	-	-	-	-	-	-	-	-
Polygonal Shape, Type	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape	Heptagonal Shape
T Shape, Type	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Additional Function	Not Provided	-	Not Provided	Not Provided	Not Provided	Not Provided	-	Not Provided	Not Provided	Not Provided	Others	Not Provided	Not Provided	Not Provided	Not Provided	-	-	-	-	-	-	-	Not Provided
Tapped, Round Hole Machining	Blind Bore	-	Blind Bore	-	-	Blind Bore / Through / Reamer Finishing	-	Blind Bore / Reamer Finishing	Blind Bore	Through	Through	Blind Bore / Reamer Finishing	Through	Blind Bore	-	-	-	-	-	-	-	Blind Bore	Through
Main Body, Surface Treatment	-	-	None	None	None	Buffed	-	Buffed	None	None	None	None	None	None	None	None	None	None	None	None	None	None	Others
Mounting Section, Surface Treatment	None / Trivalent Chromate	Zinc Plating	None / Trivalent Chromate	Trivalent Chromate	None / Trivalent Chromate	None	None	None	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	None / Trivalent Chromate	Trivalent Chromate	-	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	Trivalent Chromate	None	None

Related Categories to Knob Screws

FAQ Knob Screws

Question: How do I properly install the knob screw?: Answer: Here are some example to install a Knob Screws tapped type
1. Prepare the Surface: Clean and clear the area where the knob screw will be installed.
2. Choose the Right Screw: Select a screw with the appropriate size and thread that matches the knob.
3. Mark the Location: Use a pencil to mark where the knob screw will go, ensuring proper alignment.
4. Create Pilot Holes (if needed): Use a drill to create small guide holes in the marked spots, if the material is hard.
5. Insert the Screw: Place the screw through the knob and into the pilot hole or surface.
6. Tighten the Screw: Use a screwdriver to turn the screw clockwise, securely fastening the knob in place.
7. Test the Knob: Check the knob's movement and stability to ensure proper installation.
8. Adjust if Necessary: If the knob feels loose, you may need to tighten the screw further.
Question: Type of knobs screw?: Answer: There are various types of knob screws designed for specific applications. Here are a few common types:
1. Round Knurled Thumb Screws: These have textured heads for better grip, often used in applications where a secure grip is essential.

2. Lobed Knobs: Have a lobed design for a comfortable grip, commonly found on industrial and mechanical equipment.

3. Ball Knobs: These have a spherical shape and are commonly used on levers or control mechanisms.

4. T-Knobs: Shaped like the letter "T," these knobs are simple to turn and are used in applications where frequent adjustments are needed.

5. Star Knobs: Featuring a star-shaped head for easy turning, often used in applications requiring frequent adjustments.

6. Mushroom Knobs: Shaped like a mushroom. It is used for cabinets, drawers, and doors, these knobs provide a comfortable grip for opening and closing
Question: How to choose the knob screw?: Answer: Here are some example how to choose the knob screw
1. Usage: Identify its purpose, such as indoor/outdoor and specific applications like machines, jig fixtures, doors, cabinets, etc.
2. Material: Match durability to the environment (stainless steel, aluminum, brass and plastic (eg., ABS, Nylon and so on).
3. Thread Type and Thread Size : Ensure screw matches knob (Threaded, Tapped) or Press fit. and the thread size is appropriate to install
4. Size: Select a knob head size that is appropriate for your intended use.
5. Head Type: Choose based on knob design (eg.,round, T Shape, Wing Shape, Polygon shape etc.).
6. Easy to install : Ensure easy installation and tightening.
7. Follow Guidelines: Check knob manufacturer's recommendations.
Question: What is the usage for knob screw?: Answer: The primary usage of a knob screw is to enable manual control, adjustment, or fastening in a wide range of applications. Here are additional examples of how knob screws are used:
1. Camera Tripods: Knob screws are used to secure the legs and adjust the height of camera tripods, aiding photographers in achieving stable shots.
2. HVAC Systems: Knob screws are used to control airflow direction and intensity in ventilation systems, enhancing indoor air quality and comfort.
3. Scientific Research Instruments: In laboratories, knob screws are employed to fine-tune the position of laser optics, ensuring precise experimental setups.
4. Automated Manufacturing: Knob screws play a role in industrial automation by adjusting the position of sensors.
Question: What is the difference of knob screw and door knob?: Answer: Knob Screw:
A knob screw is a type of fastener used to secure or adjust objects together. It consists of a threaded and a head. The head is designed for easy gripping and turning by hand. Knob screws are commonly used in applications where frequent adjustments or temporary fastening is required. They are often found in devices like clamps, jigs, and fixtures. The main purpose of a knob screw is to provide a manual way of securing two components together without the need for additional tools.

Door Knob:
A door knob, on the other hand, is a handle or knob attached to a door that allows people to open and close the door. It is usually mounted on a spindle that connects the knob on the outside of the door to a mechanism on the inside, allowing the door to be latched or unlatched. Door knobs come in various designs and materials, and they serve both functional and aesthetic purposes. They are an integral part of doors in buildings and structures

In summary,
A knob screw is a threaded fastener used for securing or adjusting objects together, often by hand.
A door knob is a handle attached to a door, allowing people to open and close the door, serving a functional and aesthetic purpose.