The Washer,recessed, cataloged under National Stock Number 5310-01-101-4138, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-101-4138 |
| Primary Part Number | 12304648-1 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Outside Diameter | 0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN |
| Material Thickness | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Material | STEEL COMP 1015 OVERALL |
| Hole Diameter | 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Recess Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| 12304648-1 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12304648 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
| 12284917 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5310-01-101-4138 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 5310-01-101-4138 has 1 manufacturer part number on file: 12304648-1 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12304648-1: Style Designator: RECESSED; Outside Diameter: 0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN; Material Thickness: 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; Material: STEEL COMP 1015 OVERALL. 6 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.