The Washer,flat, cataloged under National Stock Number 5310-01-426-8406, 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 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-426-8406 |
| Primary Part Number | 12420512 |
| 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 | ASTM B633, TY1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 34.0 MILLIMETERS MINIMUM AND 36.0 MILLIMETERS MAXIMUM MM |
| Material Document and Classification | ASTM A569 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OR ASTM ST1020 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | OLIVE DRAB OVERALL |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1009 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 8.2 MILLIMETERS MINIMUM AND 9.2 MILLIMETERS MAXIMUM MM |
| Thickness | 2.33 MILLIMETERS MINIMUM AND 3.05 MILLIMETERS MAXIMUM MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-426-8406 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 5310-01-426-8406 has 3 manufacturer part numbers on file: 12420512 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc), 12420512 (U S Army Tank Automotive Command Amsta-Im-Mm), 12420512 (Amz Alabama Inc.).
Key specifications for 12420512: Surface Treatment Document and Classification: ASTM B633, TY1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 34.0 MILLIMETERS MINIMUM AND 36.0 MILLIMETERS MAXIMUM MM; Material Document and Classification: ASTM A569 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OR ASTM ST1020 ASSN STD 3RD MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 11 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.