The Washer,key, cataloged under National Stock Number 5310-00-499-4538, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Corporation. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-499-4538 |
| Primary Part Number | 2578665-001B |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Internal Straight Key Width | 0.350 INCHES MINIMUM AND 0.350 INCHES MINIMUM AND 0.360 INCHES MAXIMUM0.360 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 3.501 INCHES MINIMUM AND 3.501 INCHES MINIMUM AND 3.511 INCHES MAXIMUM3.511 INCHES MAXIMUM IN |
| Style Designator | INTERNAL KEY |
| Material Document and Classification | QQ-C-390,ALLOY G5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 8.120 INCHES NOMINAL8.120 INCHES NOMINAL IN |
| Material Thickness | 0.318 INCHES MINIMUM AND 0.318 INCHES MINIMUM AND 0.321 INCHES MAXIMUM0.321 INCHES MAXIMUM IN |
| Test Data Document | 81349-MIL-I-6866 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 | COPPER ALLOY OVERALL |
| Internal Key Quantity | 22 |
| Hole Diameter | 7.300 INCHES MINIMUM AND 7.300 INCHES MINIMUM AND 7.310 INCHES MAXIMUM7.310 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 |
|---|---|
| 2578665-001B PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2578665-001A | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) |
| 2578665-001B | 3/9 Design control — primary reference Goodrich Corp Dba Goodrich Corp |
| 2578665-001B | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) |
| 2578665-001B | C/1 Advisory reference — outside the item-of-supply concept Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
NSN 5310-00-499-4538 is a Washer,key, manufactured by Goodrich Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-499-4538 has 1 manufacturer part number on file: 2578665-001B (Goodrich Corporation).
Key specifications for 2578665-001B: Internal Straight Key Width: 0.350 INCHES MINIMUM AND 0.350 INCHES MINIMUM AND 0.360 INCHES MAXIMUM0.360 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 3.501 INCHES MINIMUM AND 3.501 INCHES MINIMUM AND 3.511 INCHES MAXIMUM3.511 INCHES MAXIMUM IN; Style Designator: INTERNAL KEY; Material Document and Classification: QQ-C-390,ALLOY G5 FED SPEC 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.