The Washer,flat, cataloged under National Stock Number 5310-00-221-3194, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Te Connectivity Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-221-3194 |
| Primary Part Number | W04016D |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Te Connectivity Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.625 INCHES NOMINAL IN |
| Material Document and Classification | -QQ-S-633 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1010 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.391 INCHES NOMINAL IN |
| Thickness | 0.062 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 |
NSN 5310-00-221-3194 is a Washer,flat, manufactured by Te Connectivity Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-221-3194 has 2 manufacturer part numbers on file: 29320 (Fmc Corp), W04016D (Te Connectivity Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 4710-00-896-2085, 3110-01-066-3385. Verify interchangeability with system specifications before substitution.
Key specifications for W04016D: Overall Diameter: 0.625 INCHES NOMINAL IN; Material Document and Classification: -QQ-S-633 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM OVERALL. 9 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.