The Washer,flat, cataloged under National Stock Number 5310-01-519-7426, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 6 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-519-7426 |
| Primary Part Number | 98029A031 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 0.875 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| 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 |
|---|---|
| 98029A031 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-519-7426 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-519-7426 has 1 manufacturer part number on file: 98029A031 (Mcmaster-Carr Supply Co).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-521-3580. Verify interchangeability with system specifications before substitution.
Key specifications for 98029A031: Overall Diameter: 0.875 INCHES NOMINAL IN; Color: BLACK OVERALL; Special Features: 3/8 SCREW SIZE, 13/32 ID, 7/8 OD, 1/8THICK; Surface Treatment: OXIDE OVERALL. 6 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.