The Washer,recessed, cataloged under National Stock Number 5310-00-264-4086, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-264-4086 |
| Primary Part Number | 8331245 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 88.9 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 92.2 ROCKWELL SUPERFICIAL 15-N MAXIMUM |
| Style Designator | RECESSED |
| Outside Diameter | 0.828 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN |
| Recess Depth | 0.158 INCHES NOMINAL IN |
| Features Provided | CASEHARDENED |
| Material Thickness | 0.060 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1010 OR STEEL COMP 1012 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 |
| Hole Diameter | 0.316 INCHES MINIMUM AND 0.322 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 |
|---|---|
| 1729C211Z | Meritor Heavy Vehicle Systems, Llc (USA) |
| 8331245 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 1436M1 | 5/9 Secondary reference Diamond Reo Truck Co |
| 1729C211 | 3/9 Design control — primary reference Meritor Heavy Vehicle Systems, Llc |
NSN 5310-00-264-4086 is a Washer,recessed, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-264-4086 has 2 manufacturer part numbers on file: 1729C211Z (Meritor Heavy Vehicle Systems, Llc), 8331245 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8331245: Overall Height: 0.203 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 88.9 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 92.2 ROCKWELL SUPERFICIAL 15-N MAXIMUM; Style Designator: RECESSED. 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.