The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-331-9556, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sabreliner Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-331-9556 |
| Primary Part Number | 560021 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sabreliner Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Height | 0.090 INCHES NOMINAL IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | AMS6448 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.765 INCHES MINIMUM AND 1.775 INCHES MAXIMUM IN |
| Recess Depth | 0.080 INCHES NOMINAL IN |
| Material Thickness | 0.150 INCHES NOMINAL IN |
| Shoulder Diameter | 0.670 INCHES NOMINAL IN |
| Recess Diameter | 1.650 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.384 INCHES MINIMUM AND 0.390 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 |
|---|---|
| 560021 PRIMARY | Sabreliner Corp (USA) |
| Reference | Meaning |
|---|---|
| 560021 | 5/9 Secondary reference Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines |
NSN 5310-00-331-9556 is a Washer,shouldered and Recessed, manufactured by Sabreliner Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-331-9556 has 1 manufacturer part number on file: 560021 (Sabreliner Corp).
1 possible match (shared part number, not a government interchangeability claim): 1670-00-555-7531. Verify interchangeability with system specifications before substitution.
Key specifications for 560021: Surface Treatment Document and Classification: AMS2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.090 INCHES NOMINAL IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; 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.