Dimension Drawing
Unit : mm
| Part Number | M (Coarse) Nominal of Thread |
Pitch | L | D1 | L1 | D | d | t | Bit Part No. | Screwdriver Part No. |
Qty per Pack | Mass (g) |
CAD Download |
RFQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SRTFS-M4-20-ALK-SET | M4 | 0.7 | 20 | 7.5 | 2.2 | 12 | 4.5 | 2.5 | SRTB-8 | SRD-6.35 | 10 | 1.81 | CAD | RFQ |
Nabeya Bi-tech Kaisha
Customer Service
Please enter questions about customization and other product-related inquiries here.
Find the inquiry form here● When purchasing less volume than one full bag, a separate handling fee is charged. For details, see the Sold Separately Service.
Related Services
Material/Finish
| SRTFS-ALK-SET | |
|---|---|
| Main Body | Equivalent to SUS304 |
| Nylon Patch | Nylon 11 |
| Rosette Washer | SUS303 |
| Strength Class | Equivalent to A2-50 |
Application
Equipment/devices disassembly/tampering preventionTheft prevention for outdoor facilities
Security measures
Safety measures
Screw return and fallout prevented
Characteristics
- Set of two-hole flat head machine screws SRTFS-ALK and rosette washers SWAS-RW.
- With nylon patch.
- Countersinking is not required.
- The friction of the nylon adhered to the thread suppresses the return rotation of the thread.
- Even if the tightening force is lost, the return rotation is suppressed, preventing the screws from falling off.
- The heat resistant temperature of the nylon patch is 120°C.
- This prevents mounting and removing with regular tools. Also, since use as a set with rosette washers makes it difficult to grasp the screw directly with a tool and rotate it, theft prevention is improved.
- Install and remove with SRTB Dedicated Bits and SRD Dedicated Magnetic Screwdriver together.
- The simple head design is also suitable for decoration.
