The Pin,shoulder,headless, cataloged under National Stock Number 5315-00-522-1981, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-00-522-1981 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Status | ACTIVE |
| Shank Diameter | 0.059 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| First End Location | BOTH ENDS |
| First End Style | SQUARE |
| Shank Length | 0.031 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Second End Relationship with First End | IDENTICAL |
| Shoulder Diameter | 0.0645 INCHES NOMINAL IN |
| Material | STEEL COMP 303S OVERALL |
| 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 |
|---|---|
| 1321200 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5315-00-522-1981 is a Pin,shoulder,headless, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5331-01-503-3505. Verify interchangeability with system specifications before substitution.
Key specifications for 5315-00-522-1981: Shank Diameter: 0.059 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; First End Location: BOTH ENDS; First End Style: SQUARE; Shank Length: 0.031 INCHES NOMINAL IN. 9 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.