The Washer,shouldered, cataloged under National Stock Number 5310-01-122-9629, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-122-9629 |
| Primary Part Number | 575R811H31 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Shoulder Height | 0.020 INCHES NOMINAL IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | MIL-P-1478 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Material Thickness | 0.030 INCHES NOMINAL IN |
| Shoulder Diameter | 0.150 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Hole Diameter | 0.116 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 |
|---|---|
| 575R811H31 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 575R811H31 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-122-9629 is a Washer,shouldered, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-122-9629 has 1 manufacturer part number on file: 575R811H31 (Northrop Grumman Support Services Corp).
Key specifications for 575R811H31: Shoulder Height: 0.020 INCHES NOMINAL IN; Style Designator: SHOULDERED; Material Document and Classification: MIL-P-1478 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.250 INCHES NOMINAL IN. 8 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.