The Washer,flat, cataloged under National Stock Number 5310-01-568-1026, 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 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-568-1026 |
| Primary Part Number | 12505213-002 |
| 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 | 19207 12505460 METHOD A MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 101.6 MILLIMETERS NOMINAL MM |
| Material Document and Classification | MIL-A-46100, HIGH HARDNESS. 0.375 INCH THK MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-A-12560 CL 4. 0.50 INCH THK ASSN STD SINGLE MATERIAL RESPONSE OVERALL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PAINT OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 17.5 MILLIMETERS NOMINAL MM |
| Thickness | 9.5 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 12505213-002 | Oshkosh Defense Llc (USA) |
| 12505213-002 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12505213 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
| 12505213-002 | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-568-1026 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 5310-01-568-1026 has 2 manufacturer part numbers on file: 12505213-002 (Oshkosh Defense Llc), 12505213-002 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12505213-002: Surface Treatment Document and Classification: 19207 12505460 METHOD A MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 101.6 MILLIMETERS NOMINAL MM; Material Document and Classification: MIL-A-46100, HIGH HARDNESS. 0.375 INCH THK MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-A-12560 CL 4. 0.50 INCH THK ASSN STD SINGLE MATERIAL RESPONSE OVERALL IN; 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.