The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-503-3975, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-503-3975 |
| Primary Part Number | 124-6938645 PART 175 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shank Diameter | 0.3125 INCHES NOMINAL IN |
| Second Shank Diameter | 0.3125 INCHES NOMINAL IN |
| First End Taper Length | 0.0312 INCHES NOMINAL IN |
| First End Location | CHAMFERED END |
| Thread Length | 0.500 INCHES NOMINAL IN |
| First End Style | CHAMFERED |
| Shank Length | 2.000 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | QQ-S-763, CD A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| 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 Diameter | 0.5625 INCHES NOMINAL IN |
| Second Shank Length | 0.500 INCHES NOMINAL IN |
| Second End Style | SQUARE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 124-6938645 PART 175 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 124-6938645 PART 175 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5315-01-503-3975 is a Pin,shoulder,headless, manufactured by Naval Sea Systems Command, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-503-3975 has 2 manufacturer part numbers on file: 124-6938645 PART 175 (Huntington Ingalls Inc Div Newport News Shipbuilding), 124-6938645 PART 175 (Naval Sea Systems Command).
Key specifications for 124-6938645 PART 175: Shank Diameter: 0.3125 INCHES NOMINAL IN; Second Shank Diameter: 0.3125 INCHES NOMINAL IN; First End Taper Length: 0.0312 INCHES NOMINAL IN; First End Location: CHAMFERED END. 20 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.