The Washer,saddle, cataloged under National Stock Number 5310-01-312-0133, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-312-0133 |
| Item Name | Washer,saddle |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 OR TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.078 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Style Designator | SADDLE |
| Material Document and Classification | QQ-A-250/5,T4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-250/12,T6 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL |
| Hole Diameter | 0.151 INCHES MINIMUM AND 0.183 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 |
|---|---|
| MIL-W-45595/5 | 4/1 Identification reference U.S. Government activity |
| M45595/5-07 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-01-312-0133 is a Washer,saddle, classified under FSC 5310, Nuts and Washers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-313-0726, 5310-01-394-3625. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-312-0133: Overall Height: 0.078 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625,TY 1 OR TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.078 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Style Designator: SADDLE. 7 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.