The Coupling,boss, cataloged under National Stock Number 4730-01-494-4573, 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 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-494-4573 |
| Primary Part Number | U543723-1 |
| Item Name | Coupling,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Thermal Systems, Llc |
| Status | ACTIVE |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 3.000 INCHES IN |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | PLAIN |
| Nominal Thread Size | 1.0625 INCHES ALL ENDS IN |
| Thread Class | 3B ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| 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 |
|---|---|
| U543723-1 PRIMARY | Triumph Thermal Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| U543723 | D/9 Drawing number reference only Triumph Thermal Systems, Llc |
NSN 4730-01-494-4573 is a Coupling,boss, manufactured by Triumph Thermal Systems, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-494-4573 has 1 manufacturer part number on file: U543723-1 (Triumph Thermal Systems, Llc).
Key specifications for U543723-1: Connection Style: GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 3.000 INCHES IN; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Style Designator: PLAIN. 9 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.