The Washer,flat, cataloged under National Stock Number 5310-01-431-9974, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Product Components Corporation. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-431-9974 |
| Primary Part Number | C18051 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Product Components Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Material Document and Classification | L-P-410, TY 6/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.317 INCHES NOMINAL IN |
| Thickness | 0.032 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 |
|---|---|
| C18051 PRIMARY | Product Components Corporation (USA) |
| W235A043-1 | Telephonics Corp (USA) |
NSN 5310-01-431-9974 is a Washer,flat, manufactured by Product Components Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-431-9974 has 2 manufacturer part numbers on file: C18051 (Product Components Corporation), W235A043-1 (Telephonics Corp).
Key specifications for C18051: Overall Diameter: 0.500 INCHES NOMINAL IN; Material Document and Classification: L-P-410, TY 6/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; 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.