The Washer,key, cataloged under National Stock Number 5310-01-148-9780, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-148-9780 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-Z-325,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-P-416,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 8.438 INCHES MAXIMUM IN |
| Heat Treatment | ANNEALED |
| Hardness Rating | 50.0 BRINELL MINIMUM AND 81.0 BRINELL MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 7.438 INCHES MINIMUM AND 7.498 INCHES MAXIMUM IN |
| Material Thickness | 0.148 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND 1 CLASS |
| External Key Quantity | 19 |
| Internal Prebent Key Length | 0.312 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN |
| Surface Treatment | ZINC AND CHROMATE OR CADMIUM AND CHROMATE OVERALL |
| External Prebent Key Width | 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Material | STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1035 OVERALL |
| Hole Diameter | 6.389 INCHES MINIMUM AND 6.424 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 |
|---|---|
| MS19070-322 | 2/2 Government specification standardization U.S. Government activity |
| MIL-W-21338 | 4/1 Identification reference U.S. Government activity |
NSN 5310-01-148-9780 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-148-9780: Surface Treatment Document and Classification: QQ-Z-325,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-P-416,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN; Overall Distance Including Keys: 8.438 INCHES MAXIMUM IN; Heat Treatment: ANNEALED. 16 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.