The Nut,tube Coupling, cataloged under National Stock Number 4730-00-074-9642, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-074-9642 |
| Primary Part Number | 475124 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Length to Shoulder | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Width Across Flats | 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 241 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Criticality Code Justification | FEAT |
| Material Document and Classification | AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.187 INCHES IN |
| Nut Height | 1.190 INCHES MINIMUM AND 1.210 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 347 OVERALL |
| Smallest Inside Diameter | 0.887 INCHES MINIMUM AND 0.893 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.750 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 475124 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 475124 | B. & E. Manufacturing Co., Inc. Dba B & E Manufacturing Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 475124 | 5/9 Secondary reference Production Services Corp the |
| 475124 | 5/9 Secondary reference Simon Paul Boiler and Welding Co |
| 475124 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 4730-00-074-9642 is a Nut,tube Coupling, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-074-9642 has 2 manufacturer part numbers on file: 475124 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 475124 (B. & E. Manufacturing Co., Inc. Dba B & E Manufacturing Co Inc).
3 possible matches (shared part number, not a government interchangeability claim): 2530-01-176-9622, 5360-01-356-4742, 5999-01-372-0880. Verify interchangeability with system specifications before substitution.
Key specifications for 475124: Length to Shoulder: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN; Width Across Flats: 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 241 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN. 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.