The Washer,recessed, cataloged under National Stock Number 5310-00-442-0902, 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9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-442-0902 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 6448 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.619 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN |
| Recess Depth | 0.025 INCHES NOMINAL IN |
| Material Thickness | 0.036 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 6150 OVERALL |
| Hole Diameter | 0.328 INCHES MINIMUM AND 0.334 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 |
|---|---|
| 10-5095 | 5/9 Secondary reference Unison Industries Llc |
| 10-5095 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
| 10-5095 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
NSN 5310-00-442-0902 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 2840-00-795-7811, 9905-00-889-8712, 4320-01-313-4185. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-442-0902: Overall Height: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: AMS 6448 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.