The Washer,recessed, cataloged under National Stock Number 5310-00-520-6079, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-520-6079 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.985 INCHES MINIMUM AND 0.990 INCHES MAXIMUM IN |
| Recess Depth | 0.125 INCHES NOMINAL IN |
| Material Thickness | 0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 90000 POUNDS PER SQUARE INCH LBS |
| Test Data Document | 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OVERALL |
| Hole Diameter | 0.440 INCHES MINIMUM AND 0.460 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 |
|---|---|
| 47-130-118 | 5/2 Secondary reference U.S. Government activity |
| 47-130-118-1 | 5/9 Secondary reference U.S. Government activity |
| 47-130-118 | 5/9 Secondary reference U.S. Government activity |
| A264 | 5/9 Secondary reference Amsco Inc |
| 47-130-118-1 | 3/2 Design control — primary reference U.S. Government activity |
| 1560H13-038 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-520-6079 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1005-01-225-8359. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-520-6079: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Overall Height: 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM IN; Style Designator: RECESSED; Material Document and Classification: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL. 10 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.