The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-357-7668, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-357-7668 |
| Primary Part Number | 42FLW624 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Washer Outside Diameter | 0.614 INCHES MINIMUM AND 0.634 INCHES MAXIMUM IN |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Special Test Features | MUST BE QUALIFIED IN ACCORDANCE WITH APPLICABLE OEM WHEEL QUALIFICATION SPECIFICATION |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Criticality Code Justification | SPCL |
| Washer Thickness | 0.046 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN |
| Material Document and Classification | MS6280 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 9235390-07 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 42FLW624 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 42FLW624 | 5/9 Secondary reference Boeing Distribution Services X, Inc. |
| 9235390-07 | 5/9 Secondary reference Skytower Aviation Services, Inc. |
| 9235390-07 | 5/9 Secondary reference Wesco Aircraft Hardware Corp. Dba Incora |
| 9235390-07 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5310-01-357-7668 is a Nut,self-Locking,extended Washer, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-357-7668 has 2 manufacturer part numbers on file: 9235390-07 (Sps Technologies, Llc Dba PB Fasteners), 42FLW624 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 42FLW624: Overall Height: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN; Washer Outside Diameter: 0.614 INCHES MINIMUM AND 0.634 INCHES MAXIMUM IN; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.