The Washer,key, cataloged under National Stock Number 5310-01-121-0384, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-121-0384 |
| Primary Part Number | 74A410533-2001 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OUTER |
| Internal Straight Key Width | 0.270 INCHES NOMINAL IN |
| Distance From Centerline to Top of Internal Key | 1.439 INCHES MINIMUM AND 1.449 INCHES MAXIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-8844,CL 1,COND E2 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS 6414 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.546 INCHES MINIMUM AND 3.547 INCHES MAXIMUM IN |
| Material Thickness | 0.281 INCHES NOMINAL IN |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL COMP 4340 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 3.130 INCHES MINIMUM AND 3.140 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 |
|---|---|
| 74A410533-2001 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10109378 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A410533-2001 | C/1 Advisory reference — outside the item-of-supply concept Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 5310-01-121-0384 is a Washer,key, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-121-0384 has 1 manufacturer part number on file: 74A410533-2001 (The Boeing Company Div Defense).
Key specifications for 74A410533-2001: Surface Finish: 32.0 MICROINCHES OUTER; Internal Straight Key Width: 0.270 INCHES NOMINAL IN; Distance From Centerline to Top of Internal Key: 1.439 INCHES MINIMUM AND 1.449 INCHES MAXIMUM IN; Hardness Rating: 33.0 ROCKWELL C MAXIMUM. 12 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.