The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-132-7055, 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 The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-132-7055 |
| Primary Part Number | 74B580174-101 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE NUT |
| Thread Series | UNIFIED NATIONAL JOINT (UNJ) |
| Criticality Code Justification | FEAT |
| Material Document and Classification | QQ-A-225/6,COND T851 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.000 INCHES IN |
| Surface Treatment | ANODIZE NUT |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | ALUMINUM ALLOY 2024 NUT |
| Material | PLASTIC LOCKING INSERT |
| Nominal Tube Outside Diameter | 2.500 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 74B580174-101 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 74B580174 | D/9 Drawing number reference only The Boeing Company Div Defense |
| LS580174 | D/9 Drawing number reference only Long-Lok, Llc |
| 10108707 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| LS580174-101 | 5/1 Secondary reference Long-Lok, Llc |
| LS580174-101 | 5/1 Secondary reference Long-Lok Llc |
NSN 4730-01-132-7055 is a Locknut,tube Fitting, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-132-7055 has 1 manufacturer part number on file: 74B580174-101 (The Boeing Company Div Defense).
Key specifications for 74B580174-101: Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE NUT; Thread Series: UNIFIED NATIONAL JOINT (UNJ); Criticality Code Justification: FEAT; Material Document and Classification: QQ-A-225/6,COND T851 FED SPEC SINGLE MATERIAL RESPONSE NUT. 12 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.
NSN 4730-01-132-7055 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.