The Washer,spring Tension, cataloged under National Stock Number 5310-00-774-4180, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ditta Seguino Ambrogio. 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-774-4180 |
| Primary Part Number | W21446 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ditta Seguino Ambrogio |
| Status | ACTIVE |
| Outside Diameter | 4.784 INCHES NOMINAL IN |
| Material Thickness | 0.021 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 3.828 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 |
|---|---|
| W21446 | Ditta Seguino Ambrogio (ITA) |
| 30221550 | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| Reference | Meaning |
|---|---|
| 30221550 | 5/9 Secondary reference Clark Equipment Co Div Doosan Infracore Portable Power |
| 3W21446 | 5/2 Secondary reference U.S. Government activity |
| 30221550 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 3W21446 | 5/9 Secondary reference Ingersoll Rand Co |
| 30221550 | 5/9 Secondary reference U.S. Government activity |
| 3W21446 | 5/9 Secondary reference U.S. Government activity |
| 3W21446 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 3W21446 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 3W21446 | 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 |
NSN 5310-00-774-4180 is a Washer,spring Tension, manufactured by Ditta Seguino Ambrogio, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-774-4180 has 2 manufacturer part numbers on file: W21446 (Ditta Seguino Ambrogio), 30221550 (Ingersoll-Rand Company Dba Ingersoll-Rand).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-253-8195. Verify interchangeability with system specifications before substitution.
Key specifications for W21446: Overall Height: 0.125 INCHES NOMINAL IN; Outside Diameter: 4.784 INCHES NOMINAL IN; Material Thickness: 0.021 INCHES NOMINAL IN; Material: STEEL 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.