The Washer,recessed, cataloged under National Stock Number 5310-01-021-6876, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-021-6876 |
| Primary Part Number | CYRD374-1 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES ALL SURFACES |
| Top Recess Diameter | 0.158 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | TC 668 05624 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Bottom Recess Diameter | 0.158 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.415 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN |
| Material Thickness | 0.049 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.1575 INCHES MINIMUM AND 0.1590 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 |
| Part Number | Manufacturer |
|---|---|
| CYRD374-1 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 5310-01-021-6876 is a Washer,recessed, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-021-6876 has 1 manufacturer part number on file: CYRD374-1 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for CYRD374-1: Surface Finish: 32.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES ALL SURFACES; Top Recess Diameter: 0.158 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; Surface Treatment Document and Classification: TC 668 05624 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 13 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.