The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-438-7162, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-438-7162 |
| Primary Part Number | 139021 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Finish | 40.0 MICROINCHES INNER |
| Surface Treatment Document and Classification | MIL-A-8625 TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Height | 0.036 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.562 INCHES NOMINAL IN |
| Material Thickness | 0.037 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.235 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN |
| Recess Diameter | 0.202 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 139021 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 139021 | 5/9 Secondary reference Tek Precision Co Limited |
NSN 5310-00-438-7162 is a Washer,shouldered and Recessed, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-438-7162 has 1 manufacturer part number on file: 139021 (Northrop Grumman Systems Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 5340-00-739-8067, 5130-01-671-7555. Verify interchangeability with system specifications before substitution.
Key specifications for 139021: Surface Finish: 40.0 MICROINCHES INNER; Surface Treatment Document and Classification: MIL-A-8625 TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.036 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED. 13 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.