The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-01-235-5953, 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 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-235-5953 |
| Primary Part Number | KFN532DL4 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.415 INCHES MINIMUM IN |
| Width Across Flats | 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Ball Seat Radius | 0.250 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 630 OVERALL |
| 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 |
|---|---|
| KFN532DL4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| KFN532DL4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| KFN532DL4 PRIMARY | Huck International, Inc (USA) |
| BH00625M4M PRIMARY | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| LE114-0035-0004 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| KFN532DL4 | 5/9 Secondary reference U.S. Government activity |
| LE114-0035-0004 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| LE114-0035-0004 | 5/9 Secondary reference Huck International, Inc |
| LE114-0035-0004 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| LE114-0035-0004 | 5/9 Secondary reference Bristol Industries, Llc |
NSN 5310-01-235-5953 is a Nut,self-Locking,single Ball Sea, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-235-5953 has 4 manufacturer part numbers on file: KFN532DL4 (Sps Technologies, Llc Dba PB Fasteners), KFN532DL4 (Howmet Global Fastening Systems Inc), KFN532DL4 (Huck International, Inc), BH00625M4M (Bristol Industries, Llc).
Key specifications for KFN532DL4: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.290 INCHES MAXIMUM IN; Washer Outside Diameter: 0.415 INCHES MINIMUM IN; Width Across Flats: 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN. 14 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.