The Washer,recessed, cataloged under National Stock Number 5310-01-583-4951, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-583-4951 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Top Recess Diameter | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Bottom Recess Diameter | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Top Recess Angle | 45.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Material Thickness | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Bottom Recess Angle | 45.0 DEGREES NOMINAL |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.375 INCHES MINIMUM AND 0.385 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 |
| Reference | Meaning |
|---|---|
| 140-007-24R21B4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-583-4951 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-583-4951: Top Recess Diameter: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Bottom Recess Diameter: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN; Top Recess Angle: 45.0 DEGREES NOMINAL. 12 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.