The Pin,spring, cataloged under National Stock Number 5315-01-678-2550, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems (operations) Limited. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5315-01-678-2550 |
| Primary Part Number | NAS561C4-24 |
| Item Name | Pin,spring |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Bae Systems (operations) Limited |
| Status | ACTIVE |
| Style Designator | SLOTTED |
| Material Document and Classification | NSAS561 NATIONAL STD ALL MATERIAL RESPONSES OVERALL |
| Diameter | 0.125 INCHES NOMINAL IN |
| Material Thickness | 0.028 INCHES NOMINAL IN |
| Specification/standard Data | 80205-NAS561 NATIONAL STD/SPEC |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| NAS561C4-24 | Bae Systems (operations) Limited (GBR) |
| Reference | Meaning |
|---|---|
| NAS561C4-24 | 3/2 Design control — primary reference U.S. Government activity |
| NAS561 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5315-01-678-2550 is a Pin,spring, manufactured by Bae Systems (operations) Limited, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-678-2550 has 1 manufacturer part number on file: NAS561C4-24 (Bae Systems (operations) Limited).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-680-9664. Verify interchangeability with system specifications before substitution.
Key specifications for NAS561C4-24: Style Designator: SLOTTED; Material Document and Classification: NSAS561 NATIONAL STD ALL MATERIAL RESPONSES OVERALL; Diameter: 0.125 INCHES NOMINAL IN; Overall Length: 1.5 INCHES NOMINAL IN. 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.