The Washer,flat, cataloged under National Stock Number 5310-01-602-9990, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-602-9990 |
| Primary Part Number | 12508624 |
| 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-DTL-53072C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 2.000 INCHES NOMINAL IN |
| Material Document and Classification | MIL-A-46100, ARMOUR PLATE STEEL MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | GREEN OVERALL |
| Surface Treatment | PAINT OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.563 INCHES NOMINAL IN |
| Thickness | 0.375 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 |
NSN 5310-01-602-9990 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 5310-01-602-9990 has 3 manufacturer part numbers on file: 24KP677 (Oshkosh Defense Llc), 12508624 (U S Army Tank Automotive Command Amsta-Im-Mm), 12508624 (Joseph T. Ryerson & Son, Inc. Dba Ryerson Steel).
Key specifications for 12508624: Surface Treatment Document and Classification: MIL-DTL-53072C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 2.000 INCHES NOMINAL IN; Material Document and Classification: MIL-A-46100, ARMOUR PLATE STEEL MIL SPEC SINGLE 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.