The Washer,flat, cataloged under National Stock Number 5310-00-673-7751, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company. 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 | 5310-00-673-7751 |
| Primary Part Number | 85012-53 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company |
| Status | ACTIVE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-C-6183 TY 1 CL 1 GRADE A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | CORK OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.312 INCHES NOMINAL IN |
| Thickness | 0.125 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 |
|---|---|
| 85012-53 PRIMARY | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (USA) |
NSN 5310-00-673-7751 is a Washer,flat, manufactured by Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-673-7751 has 1 manufacturer part number on file: 85012-53 (Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company).
Key specifications for 85012-53: Overall Diameter: 0.500 INCHES NOMINAL IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Material Document and Classification: MIL-C-6183 TY 1 CL 1 GRADE A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.