The Washer,key, cataloged under National Stock Number 5310-00-591-6739, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-591-6739 |
| Primary Part Number | S1610-23093-1 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | SS-8656,FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 4.812 INCHES MINIMUM AND 4.842 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-N-281,CLASS A FED SPEC 1ST MATERIAL RESPONSE AND MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.125 INCHES MINIMUM AND 4.145 INCHES MAXIMUM IN |
| Material Thickness | 0.063 INCHES NOMINAL IN |
| External Key Quantity | 19 |
| Internal Prebent Key Length | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | EPOXY OVERALL |
| External Prebent Key Width | 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY AND STEEL COMP 302 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 3.515 INCHES MINIMUM AND 3.535 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 |
|---|---|
| S1610-23093-1 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-00-591-6739 is a Washer,key, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-591-6739 has 1 manufacturer part number on file: S1610-23093-1 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1610-23093-1: Surface Treatment Document and Classification: SS-8656,FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN; Overall Distance Including Keys: 4.812 INCHES MINIMUM AND 4.842 INCHES MAXIMUM IN; Material Document and Classification: QQ-N-281,CLASS A FED SPEC 1ST MATERIAL RESPONSE AND MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL. 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.