The Washer,flat, cataloged under National Stock Number 5310-01-465-8303, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-465-8303 |
| Primary Part Number | WS-9273 PC 64 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Overall Diameter | 2.500 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.062 INCHES NOMINAL IN |
| Thickness | 0.136 INCHES MINIMUM AND 0.192 INCHES MAXIMUM 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 |
|---|---|
| WS-9273 PC 64 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| WS-9273 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 5310-01-465-8303 is a Washer,flat, manufactured by Lake Shore Systems, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-465-8303 has 1 manufacturer part number on file: WS-9273 PC 64 (Lake Shore Systems, Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 5310-01-465-8383, 3040-01-466-1924, 3040-01-466-3517. Verify interchangeability with system specifications before substitution.
Key specifications for WS-9273 PC 64: Overall Diameter: 2.500 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM OVERALL; Peripheral Shape Style: ROUND. 8 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.