The Washer,flat, cataloged under National Stock Number 5310-01-561-6504, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 1 specification, 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 | 5310-01-561-6504 |
| Primary Part Number | 39757 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Material | STEEL COMP 1050 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-561-6504 is a Washer,flat, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-561-6504 has 2 manufacturer part numbers on file: 39757 (Fastenal Company Dba Fastenal Co), 39757 (Barnes Group Inc. Dba Barnes Distribution).
Key specifications for 39757: Special Features: 3/4 USS USS BOWMALLOY FLAT WASHERS, WASHER, FLAT, 3/4", MEDIUM CARBON STEEL BOWMALLOY, USS 1050-1060 RC 38-42C PER BOWMAN PRINT GOLD DICHROMATE & BAKE. UNITS PER PK = 50 BD ITEM 39757; Part Name Assigned by Controlling Agency: WASHER,FLAT; End Item Identification: BUFFALO; Material: STEEL COMP 1050 OVERALL. 1 specification is 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.