Cold Formed Socket Set Screws
High-volume cold formed set screws.
Cold heading for economy at volume, with rolled threads and knurled cups available.
Specifications & technical data.
Cold formed socket set screws — the same ASME B18.3 dimensions as machined set screws, produced by cold heading for high-volume economy with work-hardened strength.
Download our cold formed set screw dimensioning table (PDF)
| Nominal Size (Basic Screw Diameter) | J | T | C | P | Q | R | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Hexagon Socket Size | Minimum Key Engagement | Cup & Flat Point Diameter | Half Dog Point Diameter | Half Dog Point Length | Basic Oval Point Radius | ||||||
| Max. | Min. | Max. | Min. | Max. | Min. | ||||||
| #5 | 0.125 | 1/16 | 0.062 | 0.080 | 0.067 | 0.057 | 0.083 | 0.078 | 0.033 | 0.027 | 0.094 |
| #6 | 0.138 | 1/16 | 0.062 | 0.080 | 0.074 | 0.064 | 0.092 | 0.087 | 0.038 | 0.032 | 0.104 |
| #8 | 0.164 | 5/64 | 0.078 | 0.090 | 0.087 | 0.076 | 0.109 | 0.103 | 0.043 | 0.037 | 0.123 |
| #10 | 0.190 | 3/32 | 0.094 | 0.100 | 0.102 | 0.088 | 0.127 | 0.120 | 0.049 | 0.041 | 0.142 |
| 1/4" | 0.250 | 1/8 | 0.125 | 0.125 | 0.132 | 0.118 | 0.156 | 0.149 | 0.067 | 0.059 | 0.188 |
| 5/16" | 0.313 | 5/32 | 0.156 | 0.156 | 0.172 | 0.156 | 0.203 | 0.195 | 0.082 | 0.074 | 0.234 |
| 3/8" | 0.375 | 3/16 | 0.188 | 0.188 | 0.212 | 0.194 | 0.250 | 0.241 | 0.099 | 0.089 | 0.281 |
| 7/16" | 0.438 | 7/32 | 0.219 | 0.219 | 0.252 | 0.232 | 0.297 | 0.287 | 0.114 | 0.104 | 0.328 |
| 1/2" | 0.500 | 1/4 | 0.250 | 0.250 | 0.291 | 0.270 | 0.344 | 0.334 | 0.130 | 0.120 | 0.375 |
| 5/8" | 0.625 | 5/16 | 0.312 | 0.312 | 0.371 | 0.347 | 0.469 | 0.456 | 0.164 | 0.148 | 0.469 |
| 3/4" | 0.750 | 3/8 | 0.375 | 0.375 | 0.450 | 0.425 | 0.562 | 0.549 | 0.196 | 0.180 | 0.562 |
| 7/8" | 0.875 | 1/2 | 0.500 | 0.500 | 0.530 | 0.502 | 0.656 | 0.642 | 0.227 | 0.211 | 0.656 |
| 1" | 1.000 | 9/16 | 0.562 | 0.562 | 0.609 | 0.579 | 0.750 | 0.734 | 0.260 | 0.240 | 0.750 |
| 1-1/8" | 1.125 | 9/16 | 0.562 | 0.562 | 0.689 | 0.655 | 0.844 | 0.826 | 0.291 | 0.271 | 0.844 |
| 1-1/4" | 1.250 | 5/8 | 0.625 | 0.625 | 0.767 | 0.733 | 0.938 | 0.920 | 0.323 | 0.303 | 0.938 |
| 1-3/8" | 1.375 | 5/8 | 0.625 | 0.625 | 0.848 | 0.808 | 1.031 | 1.011 | 0.354 | 0.334 | 1.031 |
| 1-1/2" | 1.500 | 3/4 | 0.750 | 0.750 | 0.926 | 0.886 | 1.125 | 1.105 | 0.385 | 0.365 | 1.125 |
| 1-3/4" | 1.750 | 1 | 1.000 | 1.000 | 1.086 | 1.039 | 1.312 | 1.289 | 0.448 | 0.428 | 1.312 |
| 2" | 2.000 | 1 | 1.000 | 1.000 | 1.244 | 1.193 | 1.500 | 1.474 | 0.510 | 0.490 | 1.500 |
All dimensions in inches, per ASME B18.3-2012 — dimensionally identical to machined socket set screws. Confirm requirements with our estimating team.
Standards.
What are cold formed set screws?
Cold formed set screws are dimensionally the same fastener as a machined socket set screw — the difference is how they are made. Cold heading displaces material instead of cutting it, which work-hardens the part, leaves unbroken grain flow through the socket, and prices well at volume.
- Same B18.3 dimensions as machined set screws
- Work-hardened by forming — tough sockets
- Economical at production quantities
- Machined versions for exotics and small runs
Cold formed vs. machined
Choose cold formed for standard alloys at volume. Choose machined when the material is exotic (Monel, Inconel, duplex), the quantity is small, or the configuration is special — that is where our shop takes over.
Tips for purchasing
- Same point choices as machined set screws — name the point.
- Volume pricing favors cold formed; exotics favor machined — we quote both.
- Certs and traceability on request.
Materials.
Representative capabilities — every item is manufactured or certified to your specification. Confirm requirements with our estimating team.
