The Washer,recessed, cataloged under National Stock Number 5310-00-082-8230, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-082-8230 |
| Primary Part Number | A51H10573-11 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Top Recess Diameter | 0.421 INCHES MAXIMUM IN |
| Bottom Recess Diameter | 0.421 INCHES MAXIMUM IN |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | MIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.548 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN |
| Material Thickness | 0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | PLASTIC POLYCAPROLACTAM OR PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL |
| Hole Diameter | 0.3730 INCHES MINIMUM AND 0.3735 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 |
|---|---|
| A51H10573-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| A51H10573-11 | S & L Aerospace Metals Llc (USA) |
| Reference | Meaning |
|---|---|
| A51H10573-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51H10573-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5310-00-082-8230 is a Washer,recessed, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-082-8230 has 2 manufacturer part numbers on file: A51H10573-11 (Northrop Grumman Systems Corporation), A51H10573-11 (S & L Aerospace Metals Llc).
Key specifications for A51H10573-11: Top Recess Diameter: 0.421 INCHES MAXIMUM IN; Bottom Recess Diameter: 0.421 INCHES MAXIMUM IN; Top Recess Angle: 90.0 DEGREES NOMINAL; Style Designator: RECESSED BOTH SIDES. 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.