The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-321-5326, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-321-5326 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Status | ACTIVE |
| Shank Diameter | 0.0915 INCHES MINIMUM AND 0.0930 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.138 INCHES NOMINAL IN |
| Undercut Width | 0.018 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN |
| Undercut Diameter | 0.074 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN |
| First End Location | SQUARE END |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.250 INCHES NOMINAL IN |
| First End Style | SQUARE |
| Shank Length | 0.052 INCHES NOMINAL IN |
| Style Designator | UNDERCUT |
| Material Document and Classification | AISI 303 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Second End Relationship with First End | IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Second Undercut Width | 0.030 INCHES NOMINAL IN |
| Second Shank Length | 0.250 INCHES NOMINAL IN |
| Shoulder Width Across Flats | 0.250 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Second Undercut Diameter | 0.097 INCHES NOMINAL IN |
| Material | STEEL COMP 303 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 |
| Reference | Meaning |
|---|---|
| A3041483 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5315-01-321-5326 is a Pin,shoulder,headless, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
Key specifications for 5315-01-321-5326: Shank Diameter: 0.0915 INCHES MINIMUM AND 0.0930 INCHES MAXIMUM IN; Second Shank Diameter: 0.138 INCHES NOMINAL IN; Undercut Width: 0.018 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN; Undercut Diameter: 0.074 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN. 22 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.