The Washer,recessed, cataloged under National Stock Number 5310-00-451-9029, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-451-9029 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Top Recess Diameter | 0.516 INCHES NOMINAL IN |
| Bottom Recess Diameter | 0.516 INCHES NOMINAL IN |
| Top Recess Angle | 45.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Material Thickness | 0.150 INCHES NOMINAL IN |
| Bottom Recess Angle | 45.0 DEGREES NOMINAL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.450 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 |
| Reference | Meaning |
|---|---|
| 80-505 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-451-9029 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3110-01-109-0349, 6680-01-152-9049, 8340-01-243-5910. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-451-9029: Top Recess Diameter: 0.516 INCHES NOMINAL IN; Bottom Recess Diameter: 0.516 INCHES NOMINAL IN; Top Recess Angle: 45.0 DEGREES NOMINAL; Style Designator: RECESSED BOTH SIDES. 9 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.