The Washer,spring Tension, cataloged under National Stock Number 5310-00-771-6865, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand. Government technical data includes 4 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-771-6865 |
| Primary Part Number | 3W21939 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand |
| Status | ACTIVE |
| Outside Diameter | 1.938 INCHES NOMINAL IN |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 1.516 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 |
|---|---|
| W21939 | Ditta Seguino Ambrogio (ITA) |
| 3W21939 PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| Reference | Meaning |
|---|---|
| 3W21939 | 3/2 Design control — primary reference U.S. Government activity |
| 3W21939 | 3/9 Design control — primary reference U.S. Government activity |
| 3W21939 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 3W21939 | 5/9 Secondary reference Ingersoll Rand Co |
| 3W21939 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 5310-00-771-6865 is a Washer,spring Tension, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-771-6865 has 2 manufacturer part numbers on file: W21939 (Ditta Seguino Ambrogio), 3W21939 (Ingersoll-Rand Company Dba Ingersoll-Rand).
Key specifications for 3W21939: Overall Height: 0.125 INCHES NOMINAL IN; Outside Diameter: 1.938 INCHES NOMINAL IN; Material Thickness: 0.016 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING OVERALL. 4 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.