The Washer,spring Tension, cataloged under National Stock Number 5310-01-079-9866, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-079-9866 |
| Primary Part Number | 939B038979 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Material Document and Classification | ASTMA684 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN |
| Material Thickness | 0.0200 INCHES NOMINAL0.0200 INCHES NOMINAL IN |
| Material | STEEL COMP 1095 OVERALL |
| Hole Diameter | 0.3970 INCHES NOMINAL0.3970 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 939B038979 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 12279041 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| W0484-009 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-079-9866 is a Washer,spring Tension, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-079-9866 has 2 manufacturer part numbers on file: 939B038979 (L3 Technologies, Inc. Div L3 Keo), 12279041 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 939B038979: Overall Height: 0.0290 INCHES NOMINAL0.0290 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Material Document and Classification: ASTMA684 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN. 6 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.
NSN 5310-01-079-9866 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.