The Washer,spring Tension, cataloged under National Stock Number 5310-01-112-4399, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-112-4399 |
| Primary Part Number | 12279037 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Material Document and Classification | MIL-S-46049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.322 INCHES NOMINAL IN |
| Material Thickness | 0.005 INCHES NOMINAL IN |
| Material | STEEL COMP 1075 OVERALL |
| Hole Diameter | 0.203 INCHES NOMINAL IN |
| 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 |
|---|---|
| 12279037 | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| U190-0050 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-112-4399 is a Washer,spring Tension, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-112-4399 has 1 manufacturer part number on file: 12279037 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-127-8544. Verify interchangeability with system specifications before substitution.
Key specifications for 12279037: Overall Height: 0.053 INCHES NOMINAL IN; Material Document and Classification: MIL-S-46049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.322 INCHES NOMINAL IN; Material Thickness: 0.005 INCHES NOMINAL IN. 5 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.