The Union,pipe, cataloged under National Stock Number 4730-01-574-9517, 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 Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-574-9517 |
| Primary Part Number | 8HMK4S |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Operating Pressure | 2900.754 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | BALL-CONE |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Pipe Wall Thickness Designation for Which Designed | STANDARD ALL ENDS |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Thread Series Designator | BSP.TR EXT 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 |
|---|---|
| 8HMK4S | Parker Hannifin (uk) Ltd (GBR) |
| 8121-21-21 | Gestion De Materiales Y Proyectos Sa (ESP) |
| 8HMK4S PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA) |
| 8HMK4S | Rbsl Washington (GBR) |
| H251-230 | Powerfield Limited T/a Rolls Royce Distributed Generation Systems (GBR) |
NSN 4730-01-574-9517 is a Union,pipe, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-574-9517 has 5 manufacturer part numbers on file: 8HMK4S (Parker Hannifin (uk) Ltd), 8121-21-21 (Gestion De Materiales Y Proyectos Sa), 8HMK4S (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division), 8HMK4S (Rbsl Washington), H251-230 (Powerfield Limited T/a Rolls Royce Distributed Generation Systems).
Key specifications for 8HMK4S: Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Operating Pressure: 2900.754 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Seat Type: BALL-CONE. 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.