The Washer,flat, cataloged under National Stock Number 5310-01-057-9362, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-057-9362 |
| Primary Part Number | 12266421-3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Overall Diameter | 1.120 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/4,3 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-250/4,JBCQQ-A-250/11,T6 FED SPEC 1ST MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 6061 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.312 INCHES NOMINAL IN |
| Thickness | 0.250 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 |
| Part Number | Manufacturer |
|---|---|
| 12266421-3 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12266421-3 | 5/2 Secondary reference U.S. Government activity |
| 12266421-3 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
| 666009-3 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
NSN 5310-01-057-9362 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 5310-01-057-9362 has 1 manufacturer part number on file: 12266421-3 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266421-3: Surface Treatment Document and Classification: MIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A; Overall Diameter: 1.120 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/4,3 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-250/4,JBCQQ-A-250/11,T6 FED SPEC 1ST MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.