The Washer,lock, cataloged under National Stock Number 5310-00-515-9944, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Carrier Corp. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-515-9944 |
| Primary Part Number | AU27AR271 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Carrier Corp |
| Status | ACTIVE |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Style Designator | FLAT EXTERNAL TEETH |
| Outside Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | B TYPE AND 1 DESIGN AND 2 FIGURE |
| Hole Diameter | 0.448 INCHES MINIMUM AND 0.464 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 |
|---|---|
| AU27AR271 | Carrier Corp (USA) |
| Reference | Meaning |
|---|---|
| FFW00100TYPEBDESIGN1 | 4/1 Identification reference U.S. Government activity |
NSN 5310-00-515-9944 is a Washer,lock, manufactured by Carrier Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-515-9944 has 1 manufacturer part number on file: AU27AR271 (Carrier Corp).
1 possible match (shared part number, not a government interchangeability claim): 5310-00-550-3503. Verify interchangeability with system specifications before substitution.
Key specifications for AU27AR271: Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: FLAT EXTERNAL TEETH; Outside Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Material Thickness: 0.035 INCHES NOMINAL IN. 6 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.