The Washer,flat, cataloged under National Stock Number 5310-01-442-2805, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bossard Intl Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-442-2805 |
| Primary Part Number | BN 670 M10 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bossard Intl Inc |
| Status | ACTIVE |
| Overall Diameter | 19.48 MILLIMETERS MINIMUM AND 20.48 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 10.50 MILLIMETERS NOMINAL MM |
| Thickness | 1.8 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| BN 670 M10 PRIMARY | Bossard Intl Inc (USA) |
| Reference | Meaning |
|---|---|
| 7576169-101 | 7/2 Vendor item drawing reference General Dynamics Land Systems Inc. |
NSN 5310-01-442-2805 is a Washer,flat, manufactured by Bossard Intl Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-442-2805 has 1 manufacturer part number on file: BN 670 M10 (Bossard Intl Inc).
Key specifications for BN 670 M10: Overall Diameter: 19.48 MILLIMETERS MINIMUM AND 20.48 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL COMP 304 OVERALL. 7 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.