The Washer,flat, cataloged under National Stock Number 5310-00-194-0634, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leach International Europe. Government technical data includes 10 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-194-0634 |
| Primary Part Number | AN961-6 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leach International Europe |
| Status | CANCELLED |
| Surface Treatment Document and Classification | MIL-T-10727 MIL SPEC 1ST TREATMENT RESPONSE OR QQ-S-365,GRADE B FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | TIN OR SILVER OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 642 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.139 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN |
| Thickness | 0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AN961-6 | Leach International Europe (FRA) |
| Reference | Meaning |
|---|---|
| 541021 | 5/9 Secondary reference Arquus (ex Panhard General Defense) |
| 4197412-003 | 5/9 Secondary reference Raytheon Company Div Rmd Strategic |
| S124682-1-4-1 | 5/9 Secondary reference The Boeing Company |
| 8168222 | 5/9 Secondary reference Us Army Aviation and Missile Command |
| AN961-6 | 2/2 Government specification standardization U.S. Government activity |
| 4197412-003 | 5/9 Secondary reference U.S. Government activity |
| 806182 | 5/9 Secondary reference Us Army Aviation and Missile Command |
| 5310001940634 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5310-00-194-0634 is a Washer,flat, manufactured by Leach International Europe, classified under FSC 5310, Nuts and Washers. Status: cancelled.
NSN 5310-00-194-0634 has 1 manufacturer part number on file: AN961-6 (Leach International Europe).
2 possible matches (shared part number, not a government interchangeability claim): 5310-00-245-8802, 6515-01-060-4280. Verify interchangeability with system specifications before substitution.
Key specifications for AN961-6: Surface Treatment Document and Classification: MIL-T-10727 MIL SPEC 1ST TREATMENT RESPONSE OR QQ-S-365,GRADE B FED SPEC 2ND TREATMENT RESPONSE OVERALL; Overall Diameter: 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN; Material Document and Classification: QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.
NSN 5310-00-194-0634 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.