8-45 Series Center Joint Kit for Aluminum Frame Blind Joints

Caution
Product Description
Rotation prevention type that further enhances workability. One of the most standard hidden joint that can be used for various types of aluminum extrusions.
Dimensional Drawing of Blind Joint Parts

| Type | Components (1 each) | |||||
| Blind Joint Parts Guide | Center Post | Set screw | ||||
| type | [M] Material | type | [M] Material | size | [M] Material | |
| H.M.J. | Standard | SUS304 | First in, standard direction | SCS13 | NO.8-45: M6 x 20 | SCM435 (surface treatment: black oxide film) |
| H.M.J.R. | First in, 90 degree inversion | |||||
| HAMJ | Post-insertion Standard direction | |||||
Specification Table of Blind Joint Parts
| Blind Joint Parts Model |
| HMJ8-45 |
| Center Blind Joint Parts number | Compatible frame number | [Exception] Unusable frames |
| 8−45 | 8−4545*1 8−4590*1 8−45180*2 | *1 HFSL8-4545, HFSLF8-4545, HFSLT8-4545, and HFSL8-4590 cannot be used because the thickness of the frame groove is different. HFSR8-4545, which has a curved surface, cannot be used because it cannot be machined with a wrench hole. *2 It cannot be used in the longitudinal direction because it cannot be machined with a standard hole. |
・The price list below is currentas of April 2011.
・To check the latest price, please click the "Check Price" button after confirming the model number.
| Blind Joint Parts Model | accessories | ||||||
| Blind Joint Parts Type | No. | Center Post | Quantity | Blind Joint Parts Guide | Quantity | Set screw | Quantity |
| HMJ first-in standard direction type | 8−45 | First-in center post 8-45 | 1 | Blind Joint Parts Guide 8-45 | 1 | M6 x 20 | 1 |
| HMJR first-in, 90-degree inversion type | 8−45 | First-in center post 8-45 inversion | Blind Joint Parts Guide 8-45 | M6 x 20 | |||
| HAMJ Rear-insertion type | 8−45 | Rear-insertion center post 8-45 | Blind Joint Parts Guide 8-45 | M6 x 20 | |||
Additional Processing of Blind Joint Parts
| Alterations | Code | Spec. | Alterations | Code | Spec. | ||||||
| Frame | Tap | Depth | Frame | H | Hole Diameter | ||||||
| Right end tapping [ ! ]Applies only to left end built-in type | RTP right end face ![]() | 8−4545 | M12 (Helical insert) | 18 | Right end wrench hole additional machining [ ! ]Applies only to left end built-in type | RCH![]() | RCV![]() | 8−4545 | 22.5 | 18 | |
How to Connect of Blind Joint Parts
| procedure | Front View | Side View | First-in type | Post-insertion type | explanation |
| 1 | ![]() | ![]() | ![]() | ![]() | Attach the center post to frame A. (For post-insertion types , you can insert it by turning it from the top of the groove .) |
| 2 | ![]() | ![]() | ![]() | Insert the ② Blind Joint Parts guide into the frame Ⓑ with the M hole drilled . (The through hole should face up.) | |
| 3 | ![]() | ![]() | ![]() | ② While passing the center post through the Blind Joint Parts guide hole, bring frames Ⓐ and Ⓑ closer together. | |
| 4 | ![]() | ![]() | ![]() | ② Screw the set screw ③ into the tap on the side of the Blind Joint Parts guide . | |
| 5 | ![]() | ![]() | ![]() | ③ When the set screw is tightened, frames Ⓐ and Ⓑ are joined by tension. | |
| 8-45 series model example | Frame A | Frame B | Center Blind Joint Parts |
|---|---|---|---|
| HFS8-4545-1000 | HFS8-4545-1000-LMH | HMJ8-45 |

HMJR
HMJR
fastening direction can be rotated 90 degrees.
![]() | - Method for use with frames with multiple rows of grooves on one surface: Insert joint guides from both ends of the M hole and fasten using multiple center Blind Joint Parts. - When using a frame with three rows of grooves, no hole will be drilled in the center row. (When using a frame with four rows of grooves, holes will be drilled in all grooves.) Frames with two rows (multiple rows) of grooves can be fastened together using two sets of center Blind Joint Parts kits. [ ! ]However, frames with three rows can only be fastened using the two rows at both ends. |
Reference of Blind Joint Parts
We also offer aluminum frames with the center Blind Joint Parts already installed.
No additional work is required on the mating frame.
Center Blind Joint Parts already installed in the frame
Product Comparison Information of Blind Joint Parts
■8-45 Series Blind Joint Parts
| Product name | Center Blind Joint Parts | Screw Blind Joint Parts | Single Blind Joint Parts | Post-insertion double Blind Joint Parts | First-in double Blind Joint Parts |
|---|---|---|---|---|---|
| Product Photos | ![]() | ![]() | ![]() | ![]() | ![]() |
| Installation Diagram | ![]() | ![]() | ![]() | ![]() | ![]() |
| Blind Joint Parts Material | SCS13 | Iron or SUS304 | Iron or SUS304 | Equivalent to SCS13/SUS304 | SUS316 equivalent / SUS304 |
| Features | This is the most common Blind Joint Parts that can be used with a wide range of aluminium frames. | The plate allows for reliable and inexpensive connection. | Since the additional D hole does not penetrate all the way to the flat surface, this is a Blind Joint Parts with particularly excellent aesthetics. | Stable fastening is possible from two points. This is the strongest fastening possible with Blind Joint Parts. | This Blind Joint Parts can be used for a variety of purposes, such as extending frames or attaching to plates. |
| 8-45 series product page | Viewing | Product page | Product page | Product page | Product page |
8-45 series related products of Blind Joint Parts
■8-45 series (groove width 10mm)
| Product name | Aluminum frame | Blind Joint Parts | Frame cap | Groove cover | nut |
|---|---|---|---|---|---|
| photograph | ![]() | ![]() | ![]() | ![]() | ![]() |
| Product page | Here | Here | Here | Here | Here |


































