The Pin,spring, cataloged under National Stock Number 5315-00-971-7747, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5315-00-971-7747 |
| Primary Part Number | 28960-3-4 |
| Item Name | Pin,spring |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Expanded Diameter | 0.099 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | COILED |
| Diameter | 0.094 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 416 OR STEEL COMP 420 OR STEEL COMP 416SE OVERALL |
| 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 |
|---|---|
| 28960-3-4 | Triumph Engine Control Systems Llc (USA) |
| 3-321NX1-41NMCP | Spirol Industries Ltd (GBR) |
| 094-0250MCP | Spirol Industries Ltd (GBR) |
| Reference | Meaning |
|---|---|
| MS51923-442 | 5/9 Secondary reference U.S. Government activity |
| MS51923-442 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1407C7M4 | 5/1 Secondary reference U.S. Government activity |
NSN 5315-00-971-7747 is a Pin,spring, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-00-971-7747 has 3 manufacturer part numbers on file: 28960-3-4 (Triumph Engine Control Systems Llc), 3-321NX1-41NMCP (Spirol Industries Ltd), 094-0250MCP (Spirol Industries Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-086-6189. Verify interchangeability with system specifications before substitution.
Key specifications for 28960-3-4: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Expanded Diameter: 0.099 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM OVERALL; Style Designator: COILED. 7 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.