The Washer,recessed, cataloged under National Stock Number 5310-00-662-2020, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-662-2020 |
| Primary Part Number | 521987-71 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines |
| Status | ACTIVE |
| Heat Treatment | AS FABRICATED |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5062 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.810 INCHES NOMINAL IN |
| Recess Depth | 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Material Thickness | 0.070 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Recess Diameter | 0.720 INCHES MINIMUM AND 0.742 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.670 INCHES MINIMUM AND 0.672 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 |
|---|---|
| 521987-71 PRIMARY | Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines (USA) |
NSN 5310-00-662-2020 is a Washer,recessed, manufactured by Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-662-2020 has 1 manufacturer part number on file: 521987-71 (Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines).
Key specifications for 521987-71: Overall Height: 0.070 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Heat Treatment: AS FABRICATED; Style Designator: RECESSED; Material Document and Classification: AMS 5062 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.