The Washer,spring Tension, cataloged under National Stock Number 5310-00-045-7977, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kidde-Fenwal, Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-045-7977 |
| Primary Part Number | 211138 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kidde-Fenwal, Llc |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Outside Diameter | 0.779 INCHES MINIMUM AND 0.787 INCHES MAXIMUM IN |
| Material Thickness | 0.037 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| Surface Treatment | TIN OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.402 INCHES MINIMUM AND 0.409 INCHES MAXIMUM 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 |
|---|---|
| 211138 PRIMARY | Kidde-Fenwal, Llc (USA) |
| Reference | Meaning |
|---|---|
| 211138 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 5310-00-045-7977 is a Washer,spring Tension, manufactured by Kidde-Fenwal, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-045-7977 has 1 manufacturer part number on file: 211138 (Kidde-Fenwal, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5133-01-095-6643. Verify interchangeability with system specifications before substitution.
Key specifications for 211138: Overall Height: 0.063 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Outside Diameter: 0.779 INCHES MINIMUM AND 0.787 INCHES MAXIMUM IN; Material Thickness: 0.037 INCHES MINIMUM AND 0.040 INCHES MAXIMUM 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.
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.