The Nut,tube Coupling, cataloged under National Stock Number 4730-01-336-5338, 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 Mohn Frank Houston Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-336-5338 |
| Primary Part Number | 343-126-3 ITEM11 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mohn Frank Houston Inc |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 12.700 MILLIMETERS MM |
| Material | STEEL OVERALL |
| Fabrication Method | MACHINED |
| Nominal Tube Outside Diameter | 18.0 MILLIMETERS MM |
| 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 |
|---|---|
| 343-126-3 ITEM11 PRIMARY | Mohn Frank Houston Inc (USA) |
| Reference | Meaning |
|---|---|
| 143529 | 5/9 Secondary reference Wimoh As |
NSN 4730-01-336-5338 is a Nut,tube Coupling, manufactured by Mohn Frank Houston Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-336-5338 has 1 manufacturer part number on file: 343-126-3 ITEM11 (Mohn Frank Houston Inc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-1324. Verify interchangeability with system specifications before substitution.
Key specifications for 343-126-3 ITEM11: Thread Direction: RIGHT-HAND; Nominal Thread Size: 12.700 MILLIMETERS MM; Special Features: USED ON TAGS 39/40-HULLS 4667/4668 MAIN AND AUX. CENTRIFUGAL PUMPS AND MOTORS; MADE FOR SEA WATER/SALT WATER APPLICATION; Material: STEEL OVERALL. 5 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.