The Washer,flat, cataloged under National Stock Number 5310-00-159-6299, 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 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-159-6299 |
| Primary Part Number | 11657559 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Overall Diameter | 2.190 INCHES MINIMUM AND 2.310 INCHES MAXIMUM IN |
| Hardness Rating | 40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | 417,TY R,CL RS,GR 420 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | RUBBER SYNTHETIC OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.675 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN |
| Thickness | 0.450 INCHES MINIMUM AND 0.510 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 |
NSN 5310-00-159-6299 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 5310-00-159-6299 has 2 manufacturer part numbers on file: 11657559 (U S Army Tank Automotive Command Amsta-Im-Mm), 971669 (Am General Llc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-7834. Verify interchangeability with system specifications before substitution.
Key specifications for 11657559: Overall Diameter: 2.190 INCHES MINIMUM AND 2.310 INCHES MAXIMUM IN; Hardness Rating: 40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: 417,TY R,CL RS,GR 420 MIL STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 9 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.