The Washer,flat, cataloged under National Stock Number 5310-01-511-3327, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-511-3327 |
| Primary Part Number | 12387279-13 |
| 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-STD-171, 1.9.2.2 MIL STD 1ST TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.868 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A569, ANY TEMPER ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.370 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Thickness | 0.064 INCHES MINIMUM AND 0.094 INCHES MAXIMUM 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 |
|---|---|
| 12387279-13 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5310-01-511-3327 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 5310-01-511-3327 has 1 manufacturer part number on file: 12387279-13 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12387279-13: Surface Treatment Document and Classification: MIL-STD-171, 1.9.2.2 MIL STD 1ST TREATMENT RESPONSE OVERALL; Overall Diameter: 0.868 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN; Material Document and Classification: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A569, ANY TEMPER 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.