The Washer,flat, cataloged under National Stock Number 5310-01-566-1004, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fascan International, Inc.. Government technical data includes 10 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 | 5310-01-566-1004 |
| Primary Part Number | MIL-001-430 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fascan International, Inc. |
| Status | ACTIVE |
| Overall Diameter | 1.313 INCHES NOMINAL IN |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | YELLOW OVERALL |
| Surface Treatment | CHROMATE ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.687 INCHES NOMINAL IN |
| Thickness | 0.097 INCHES MINIMUM AND 0.121 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 |
|---|---|
| MIL-001-430 PRIMARY | Fascan International, Inc. (USA) |
| 98180A160 | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-566-1004 is a Washer,flat, manufactured by Fascan International, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-566-1004 has 2 manufacturer part numbers on file: MIL-001-430 (Fascan International, Inc.), 98180A160 (Mcmaster-Carr Supply Co).
Key specifications for MIL-001-430: Overall Diameter: 1.313 INCHES NOMINAL IN; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Color: YELLOW OVERALL. 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.
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.