| Specification |
|---|
| Manufacturer | Penn Engineering |
| Manufacturer's Part Number | PF12-0420-2BL |
| Description | PF12-0420-2BL Large Knob, Spring-Loaded Self-Clinching Panel Screws |
| Product Type | PF12 |
| Thread Size | 1/4-20 |
| Thread Code | 0420 |
| A Shank Max. | 0.036 in |
| For Use In Sheet Hardness | HRB 80 or less (Hardness Rockwell “B” Scale) / HB 150 or less (Hardness Brinell) |
| Thread Specification | External, ASME B1.1, 2A / ASME B1.13M, 6g |
| Fastener Retainer Material | Hardened Carbon Steel |
| Material Spring | 300 Series Stainless Steel |
| A | 0.036 in Max. |
| C | 0.374 in Max. |
| E | 0.575 in ± .010 |
| G | 0.41 in ± .025 |
| P | 0.12 in ± .025 |
| T1 | 0.53 in Nom. |
| T2 | 0.79 in Nom. |
| Hole Size in Sheet | 0.375 in + .003 - .000 |
| Min. Dist. Hole C/L to Edge | 0.46 |
| Drive Size | #3 |
| Material Knob | Aluminum |
| Material Screw | 400 Series Stainless Steel |
| Finish Knob | Black Anodize |
| Finish Retainer | Bright Nickel over Copper Flash per ASTM B689, Type II |
| Finish Screw | Black Nitride, AMS2753, Section 3 |
| Finish Spring | Natural Finish |
