The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-151-0650, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 6 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-151-0650 |
| Primary Part Number | 81973-428 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Nominal Tube Outside Diameter | 0.320 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 81973-428 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| H50539-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 4055T70P03 | 5/2 Secondary reference U.S. Government activity |
| 4055T70 | 1/2 Source control — Government-approved source U.S. Government activity |
| E12283-4 | 5/9 Secondary reference Harvard Industries Inc |
| 10159593 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 4730PL2125559 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4055T70P01 | 5/9 Secondary reference U.S. Government activity |
| 4055T70P02 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-151-0650 is a Locknut,tube Fitting, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-151-0650 has 2 manufacturer part numbers on file: 81973-428 (Sps Technologies, Llc Dba PB Fasteners), H50539-4 (Howmet Global Fastening Systems Inc).
Key specifications for 81973-428: Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN; Thread Class: 3B. 6 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.