The Washer,flat, cataloged under National Stock Number 5310-00-276-2816, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-276-2816 |
| Primary Part Number | 61623 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Overall Diameter | 0.493 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.274 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN |
| Thickness | 0.055 INCHES MINIMUM AND 0.069 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 |
|---|---|
| 61623 | Cummins Inc (USA) |
| 61623 PRIMARY | Cummins Inc. (USA) |
| 90093-0040 | Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA) |
NSN 5310-00-276-2816 is a Washer,flat, manufactured by Cummins Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-276-2816 has 3 manufacturer part numbers on file: 61623 (Cummins Inc), 61623 (Cummins Inc.), 90093-0040 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc).
4 possible matches (shared part number, not a government interchangeability claim): 5310-00-373-0121, 6520-01-242-9470, 5930-01-367-8689. Verify interchangeability with system specifications before substitution.
Key specifications for 61623: Overall Diameter: 0.493 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: COPPER 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.