The Washer,recessed, cataloged under National Stock Number 5310-00-078-0569, 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9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-078-0569 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Heat Treatment | HOT ROLLED OR COLD DRAWN 1/2 HARD CONDITION |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-B-626,COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.438 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Recess Diameter | 0.335 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.187 INCHES NOMINAL IN |
| Recess Angle | 100.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 453004 | C/1 Advisory reference — outside the item-of-supply concept C&h Hydraulics Inc Dba C & H Hydraulics Inc |
| 453004 | 3/9 Design control — primary reference C & H Hydraulics, Inc Dba Acme Divac Industries Use CAGE Code 6n016 for Cataloging |
NSN 5310-00-078-0569 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1670-01-479-2370. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-078-0569: Heat Treatment: HOT ROLLED OR COLD DRAWN 1/2 HARD CONDITION; Style Designator: RECESSED; Material Document and Classification: QQ-B-626,COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.438 INCHES NOMINAL IN. 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.