The Washer,key, cataloged under National Stock Number 5310-00-918-4677, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Berkshire Manufactured Products, Inc. Dba Pursuit Aerospace. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-918-4677 |
| Primary Part Number | 4002T66P10 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Berkshire Manufactured Products, Inc. Dba Pursuit Aerospace |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Internal Straight Key Width | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 1.568 INCHES MINIMUM AND 1.573 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | +16-TY5 CL 1,FSCM 99207 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Distance Including Keys | 3.980 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 6350 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.690 INCHES MINIMUM AND 3.710 INCHES MAXIMUM IN |
| Material Thickness | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| External Straight Key Width | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 3.400 INCHES MINIMUM AND 3.420 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 |
|---|---|
| 4002T66P10 | Berkshire Manufactured Products, Inc. Dba Pursuit Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 4002T66P10 | 5/9 Secondary reference General Electric Company |
| 4002T66P10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-918-4677 is a Washer,key, manufactured by Berkshire Manufactured Products, Inc. Dba Pursuit Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-918-4677 has 1 manufacturer part number on file: 4002T66P10 (Berkshire Manufactured Products, Inc. Dba Pursuit Aerospace).
Key specifications for 4002T66P10: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Internal Straight Key Width: 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 1.568 INCHES MINIMUM AND 1.573 INCHES MAXIMUM IN; Surface Treatment Document and Classification: +16-TY5 CL 1,FSCM 99207 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 15 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.