The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-388-5481, 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 Triumph Thermal Systems, Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-388-5481 |
| Primary Part Number | UA538952-367 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Thermal Systems, Llc |
| Status | ACTIVE |
| Length | 1.375 INCHES NOMINAL IN |
| Thread Provision | THREADED FIRST PROVISION |
| Thread Provision | THREADED SECOND PROVISION |
| Design Type | TUBULAR, HEX SHAPE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST PROVISION |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND PROVISION |
| Thread Length | 0.562 INCHES NOMINAL FIRST PROVISION IN |
| Thread Length | 0.562 INCHES NOMINAL SECOND PROVISION IN |
| Outside Diameter | 0.500 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIRST PROVISION |
| Thread Direction | RIGHT-HAND SECOND PROVISION |
| Thread Size Designator | 3/4-16 FIRST PROVISION |
| Thread Size Designator | 3/4-16 THIRD PROVISION |
| Surface Treatment | ANODIZE |
| Material | STEEL |
| Orifice Diameter | 0.147 INCHES NOMINAL IN |
| 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 |
|---|---|
| UA538952-367 PRIMARY | Triumph Thermal Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| UA538952 | D/9 Drawing number reference only Triumph Thermal Systems, Llc |
NSN 4730-01-388-5481 is a Restrictor,fluid Flow, manufactured by Triumph Thermal Systems, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-388-5481 has 1 manufacturer part number on file: UA538952-367 (Triumph Thermal Systems, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-399-0819, 4730-01-399-0821. Verify interchangeability with system specifications before substitution.
Key specifications for UA538952-367: Length: 1.375 INCHES NOMINAL IN; Thread Provision: THREADED FIRST PROVISION; Thread Provision: THREADED SECOND PROVISION; Design Type: TUBULAR, HEX SHAPE. 16 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.