The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-01-342-7253, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bristol Industries, Llc. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-342-7253 |
| Primary Part Number | BH00629M5M |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.580 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN |
| Width Across Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE WASHER |
| Material Document and Classification | AMS 5686 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5697 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5639 ASSN STD 2ND MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Ball Seat Radius | 0.313 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 305 OR STEEL COMP 304 NUT |
| Material | STEEL COMP 630 WASHER |
| 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 |
|---|---|
| BH00629M5M PRIMARY | Bristol Industries, Llc (USA) |
| KFN671-5 PRIMARY | Huck International, Inc (USA) |
| KFN671-5 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| KFN671-5 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| LE114-0036-0005 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| KFN522DL5DL | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| MN36-5AW | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5310-01-342-7253 is a Nut,self-Locking,single Ball Sea, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-342-7253 has 4 manufacturer part numbers on file: BH00629M5M (Bristol Industries, Llc), KFN671-5 (Huck International, Inc), KFN671-5 (Sps Technologies, Llc Dba PB Fasteners), KFN671-5 (Howmet Global Fastening Systems Inc).
Key specifications for BH00629M5M: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.430 INCHES NOMINAL IN; Washer Outside Diameter: 0.580 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN; Width Across Flats: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN. 17 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.