The Washer,seal, cataloged under National Stock Number 5310-01-641-7657, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Reiss Manufacturing, Inc.. Government technical data includes 5 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 | 5310-01-641-7657 |
| Primary Part Number | 93412A401 |
| Item Name | Washer,seal |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Reiss Manufacturing, Inc. |
| Status | ACTIVE |
| Style Designator | CONCAVE |
| Outside Diameter | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Material | RUBBER SYNTHETIC OVERALL |
| Hole Diameter | 0.120 INCHES NOMINAL0.120 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 |
NSN 5310-01-641-7657 is a Washer,seal, manufactured by Reiss Manufacturing, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-641-7657 has 2 manufacturer part numbers on file: 93412A401 (Mcmaster-Carr Supply Company), 93412A401 (Reiss Manufacturing, Inc.).
Key specifications for 93412A401: Overall Height: 0.052 INCHES MINIMUM AND 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM0.072 INCHES MAXIMUM IN; Style Designator: CONCAVE; Outside Diameter: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN; Color: BLACK OVERALL. 5 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.