The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-478-4175, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-478-4175 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Status | ACTIVE |
| Shank Diameter | 0.313 INCHES NOMINAL IN |
| Undercut Width | 0.063 INCHES NOMINAL IN |
| First End Taper Length | 0.063 INCHES NOMINAL IN |
| Undercut Diameter | 0.250 INCHES NOMINAL IN |
| First End Location | BOTH ENDS |
| First End Counterbore Diameter | 0.094 INCHES NOMINAL IN |
| Second End Taper Angle | 45.0 DEGREES NOMINAL |
| Thread Length | 0.250 INCHES NOMINAL IN |
| First End Style | CHAMFERED AND COUNTERBORED |
| Shank Length | 0.313 INCHES NOMINAL IN |
| Style Designator | UNDERCUT |
| Second End Taper Length | 0.063 INCHES NOMINAL IN |
| First End Taper Angle | 45.0 DEGREES NOMINAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Shoulder Width Across Flats | 0.375 INCHES NOMINAL IN |
| Second End Style | CHAMFERED |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| First End Counterbore Depth | 0.094 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2640-343X2 PIECE 11 | 5/9 Secondary reference U.S. Government activity |
| 845-2050583 PIECE 11 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5315-01-478-4175 is a Pin,shoulder,headless, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
Key specifications for 5315-01-478-4175: Shank Diameter: 0.313 INCHES NOMINAL IN; Undercut Width: 0.063 INCHES NOMINAL IN; First End Taper Length: 0.063 INCHES NOMINAL IN; Undercut Diameter: 0.250 INCHES NOMINAL IN. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.