The Washer,keyway, cataloged under National Stock Number 5310-00-703-4066, 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 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-703-4066 |
| Primary Part Number | 8351289 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| External Keyway Width | 0.060 INCHES NOMINAL IN |
| Hardness Rating | 50.0 ROCKWELL C MINIMUM |
| Outside Diameter | 1.185 INCHES MINIMUM AND 1.195 INCHES MAXIMUM IN |
| Material Thickness | 0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Material | STEEL COMP 1095 OVERALL |
| Hole Diameter | 0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN |
| External Keyway Length | 0.015 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 |
| Part Number | Manufacturer |
|---|---|
| 8351289 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 8351289 | 5/2 Secondary reference U.S. Government activity |
| 2520007034066 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5310-00-703-4066 is a Washer,keyway, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-703-4066 has 1 manufacturer part number on file: 8351289 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8351289: External Keyway Width: 0.060 INCHES NOMINAL IN; Hardness Rating: 50.0 ROCKWELL C MINIMUM; Outside Diameter: 1.185 INCHES MINIMUM AND 1.195 INCHES MAXIMUM IN; Material Thickness: 0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN. 7 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.