The Washer,flat, cataloged under National Stock Number 5310-00-119-6495, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Simmonds Precision Products Inc. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-119-6495 |
| Primary Part Number | S9551 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Simmonds Precision Products Inc |
| Status | ACTIVE |
| Overall Diameter | 0.635 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-225/6;T351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PLASTIC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.419 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN |
| Thickness | 0.103 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 |
|---|---|
| S9551 PRIMARY | Simmonds Precision Products Inc (USA) |
NSN 5310-00-119-6495 is a Washer,flat, manufactured by Simmonds Precision Products Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-119-6495 has 1 manufacturer part number on file: S9551 (Simmonds Precision Products Inc).
Key specifications for S9551: Overall Diameter: 0.635 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-225/6;T351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PLASTIC 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.