The Washer,flat, cataloged under National Stock Number 5310-00-737-5259, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-737-5259 |
| Primary Part Number | 7375259 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | QQ-Z-325,TYPE 2,CLASS 1 FED SPEC 1ST TREATMENT RESPONSE AND QQ-Z-325,TYPE 2,CLASS 2 FED SPEC 2ND TREATMENT RESPONSE AND QQ-Z-325,TYPE 2,CLASS 3 FED SPEC 3RD TREATMENT RESPONSE OVERALL |
| Overall Diameter | 2.235 INCHES MINIMUM AND 2.265 INCHES MAXIMUM IN |
| Material Document and Classification | SAE ASSN STD 1ST MATERIAL RESPONSE AND SAE ASSN STD 2ND MATERIAL RESPONSE AND QQ-S-698 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1015 OR STEEL COMP 1025 OR STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.266 INCHES MINIMUM AND 1.296 INCHES MAXIMUM IN |
| Thickness | 0.225 INCHES MINIMUM AND 0.245 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 |
NSN 5310-00-737-5259 is a Washer,flat, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-737-5259 has 2 manufacturer part numbers on file: 7375259 (U S Army Tank Automotive Command Amsta-Im-Mm), 1829W179 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for 7375259: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Surface Treatment Document and Classification: QQ-Z-325,TYPE 2,CLASS 1 FED SPEC 1ST TREATMENT RESPONSE AND QQ-Z-325,TYPE 2,CLASS 2 FED SPEC 2ND TREATMENT RESPONSE AND QQ-Z-325,TYPE 2,CLASS 3 FED SPEC 3RD TREATMENT RESPONSE OVERALL; Overall Diameter: 2.235 INCHES MINIMUM AND 2.265 INCHES MAXIMUM IN. 12 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.