The Nut,union, cataloged under National Stock Number 4730-00-901-6294, 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 Airtronics, Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-901-6294 |
| Primary Part Number | A414240-8 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Airtronics, Llc |
| Status | ACTIVE |
| Width Across Flats | 4.125 INCHES NOMINAL IN |
| Shoulder Step Width | 0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN |
| Shoulder Width | 0.375 INCHES NOMINAL IN |
| Thread Series | UN |
| Thread Direction | RIGHT-HAND |
| Nut Height | 1.500 INCHES NOMINAL IN |
| Smallest Inside Diameter | 3.190 INCHES MINIMUM AND 3.193 INCHES MAXIMUM IN |
| Shoulder Seat Diameter | 3.755 INCHES MINIMUM AND 3.765 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| A414240-8 | Airtronics, Llc (USA) |
| A414240-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| A414240-8 | Hamill Manufacturing Company Dba Hamill Manufacturing Co (USA) |
| A414240-8 | C & B Technology, Llc (USA) |
| A414240-8 | Ammcon Corp. (USA) |
| A414240-8 | Duhadaway Tool & Die Shop Inc (USA) |
| A414240-8 | Bec Systems Llc Dba Bec Machine Products (USA) |
| A414240-8 | Nassau Tool Works, Inc (USA) |
| A414240-8 | Pre-Mach Inc (USA) |
| A414240-8 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| A414240-8 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| A414240-8 | 3/2 Design control — primary reference U.S. Government activity |
| EPA21000-273 | 8/1 NATO reproduction reference Naval Group Site De Brest |
| A414240-8 | 5/9 Secondary reference Master Research & Manufacturing, Inc. Dba Master Research & Manufacturing Inc |
| A414240-8 | 5/9 Secondary reference Nuflo, Inc. |
NSN 4730-00-901-6294 is a Nut,union, manufactured by Airtronics, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-901-6294 has 10 manufacturer part numbers on file: A414240-8 (Airtronics, Llc), A414240-8 (Sps Technologies, Llc Dba PB Fasteners), A414240-8 (Hamill Manufacturing Company Dba Hamill Manufacturing Co), A414240-8 (C & B Technology, Llc), A414240-8 (Ammcon Corp.) and 5 more.
Key specifications for A414240-8: Width Across Flats: 4.125 INCHES NOMINAL IN; Shoulder Step Width: 0.375 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN; Shoulder Width: 0.375 INCHES NOMINAL IN; Thread Series: UN. 8 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.