The Washer,key, cataloged under National Stock Number 5310-00-173-7591, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lighthouse Manufacturing Llc Div Richard Machine Co. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-173-7591 |
| Primary Part Number | 3020T46G01 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lighthouse Manufacturing Llc Div Richard Machine Co |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Overall Distance Including Keys | 4.430 INCHES MINIMUM AND 4.450 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Outside Diameter | 4.210 INCHES MINIMUM AND 4.220 INCHES MAXIMUM IN |
| Material Thickness | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| External Straight Key Width | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| Test Data Document | 99207-+3TF2 CLASS A SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | NICKEL ALLOY OVERALL |
| Hole Diameter | 3.940 INCHES MINIMUM AND 3.960 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 | F |
| Part Number | Manufacturer |
|---|---|
| 3020T46G01 | Lighthouse Manufacturing Llc Div Richard Machine Co (USA) |
| Reference | Meaning |
|---|---|
| 3020T46G01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-173-7591 is a Washer,key, manufactured by Lighthouse Manufacturing Llc Div Richard Machine Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-173-7591 has 1 manufacturer part number on file: 3020T46G01 (Lighthouse Manufacturing Llc Div Richard Machine Co).
Key specifications for 3020T46G01: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Overall Distance Including Keys: 4.430 INCHES MINIMUM AND 4.450 INCHES MAXIMUM IN; Style Designator: KEY; Outside Diameter: 4.210 INCHES MINIMUM AND 4.220 INCHES MAXIMUM IN. 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.