The Washer,flat, cataloged under National Stock Number 5310-01-105-5251, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-105-5251 |
| Primary Part Number | 12293787 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AQQ-P-35,TYPE 1,2,3 OR 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.420 INCHES NOMINAL IN |
| Material Document and Classification | AMS5518 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Thickness | 0.040 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 |
|---|---|
| 12293787 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 12293787 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
| 12293787 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-105-5251 is a Washer,flat, manufactured by Us Army Aviation and Missile Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-105-5251 has 1 manufacturer part number on file: 12293787 (Us Army Aviation and Missile Command).
Key specifications for 12293787: Surface Treatment Document and Classification: AQQ-P-35,TYPE 1,2,3 OR 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.420 INCHES NOMINAL IN; Material Document and Classification: AMS5518 ASSN STD SINGLE 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.