The Washer,key, cataloged under National Stock Number 5310-00-478-9372, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cm Manufacturing Inc Dba Cm Manufacturing Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-478-9372 |
| Primary Part Number | 1706-41 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cm Manufacturing Inc Dba Cm Manufacturing Inc |
| Status | ACTIVE |
| Wire Hole Diameter | 0.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | CPT 8204,FSCM 13002 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.231 INCHES MINIMUM AND 0.241 INCHES MAXIMUM IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Style Designator | INTERNAL PREBENT KEY |
| Outside Diameter | 2.750 INCHES NOMINAL IN |
| Material Thickness | 0.250 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4340 OVERALL |
| Hole Diameter | 2.030 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-478-9372 is a Washer,key, manufactured by Cm Manufacturing Inc Dba Cm Manufacturing Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-478-9372 has 2 manufacturer part numbers on file: 1706-41 (Goodrich Corporation), 1706-41 (Cm Manufacturing Inc Dba Cm Manufacturing Inc).
1 possible match (shared part number, not a government interchangeability claim): 7690-00-727-1006. Verify interchangeability with system specifications before substitution.
Key specifications for 1706-41: Wire Hole Diameter: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: CPT 8204,FSCM 13002 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.231 INCHES MINIMUM AND 0.241 INCHES MAXIMUM IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM. 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.