The Washer,key, cataloged under National Stock Number 5310-01-350-6877, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-350-6877 |
| Primary Part Number | 334392P01 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc |
| Status | ACTIVE |
| Internal Straight Key Width | 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.106 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Material Thickness | 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 631 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 0.230 INCHES MINIMUM AND 0.236 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 |
|---|---|
| 334392P01 PRIMARY | Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc (USA) |
| F1T7221-3R-C | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 334392P01 | 5/9 Secondary reference Howden Fluid Systems |
| 334392P01 | 3/9 Design control — primary reference Meggitt Defense Systems, Inc. Dba Meggitt Western Design |
NSN 5310-01-350-6877 is a Washer,key, manufactured by Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-350-6877 has 2 manufacturer part numbers on file: 334392P01 (Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc), F1T7221-3R-C (Fastener Innovation Technology, Inc. Dba F I T).
Key specifications for 334392P01: Internal Straight Key Width: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.106 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: KEY. 11 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.