The Washer,key, cataloged under National Stock Number 5310-00-538-4339, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-538-4339 |
| Primary Part Number | 5384339 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Internal Straight Key Width | 0.281 INCHES NOMINAL IN |
| Distance From Centerline to Top of Internal Key | 0.750 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-640,CANC FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 2.625 INCHES NOMINAL IN |
| Material Thickness | 0.125 INCHES NOMINAL IN |
| Material | STEEL COMP 1035 OR STEEL COMP 1045 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 1.781 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 |
|---|---|
| 5384339 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5310-00-538-4339 is a Washer,key, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-538-4339 has 1 manufacturer part number on file: 5384339 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 5384339: Internal Straight Key Width: 0.281 INCHES NOMINAL IN; Distance From Centerline to Top of Internal Key: 0.750 INCHES NOMINAL IN; Style Designator: KEY; Material Document and Classification: QQ-S-640,CANC FED SPEC ALL MATERIAL RESPONSES OVERALL. 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.