The Washer,spring Tension, cataloged under National Stock Number 5310-01-079-9864, 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 5 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. 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 | 5310-01-079-9864 |
| Primary Part Number | BX939-79 |
| 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 |
| Outside Diameter | 2.370 INCHES NOMINAL2.370 INCHES NOMINAL IN |
| Material Thickness | 0.024 INCHES NOMINAL0.024 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 1.990 INCHES NOMINAL1.990 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 |
|---|---|
| BX939-79 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 11669609 | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| SSR-0237-S17 PRIMARY | Smalley Steel Ring Co. (USA) |
NSN 5310-01-079-9864 is a Washer,spring Tension, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-079-9864 has 3 manufacturer part numbers on file: BX939-79 (L3 Technologies, Inc. Div L3 Keo), 11669609 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate), SSR-0237-S17 (Smalley Steel Ring Co.).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-498-0348. Verify interchangeability with system specifications before substitution.
Key specifications for BX939-79: Overall Height: 0.178 INCHES NOMINAL0.178 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Outside Diameter: 2.370 INCHES NOMINAL2.370 INCHES NOMINAL IN; Material Thickness: 0.024 INCHES NOMINAL0.024 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.