The Trap,drainage Pipe, cataloged under National Stock Number 4730-01-539-2385, 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 Armstrong International Inc Dba Armstrong Machine Works. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-539-2385 |
| Primary Part Number | 22 LD |
| Item Name | Trap,drainage Pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Armstrong International Inc Dba Armstrong Machine Works |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.750 INCHES SECOND END IN |
| Connection Style | SOCKET (PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Style Designator | RUNNING TRAP SINGLE VENT |
| Material Document and Classification | ASTM A167 ASSN STD ALL MATERIAL RESPONSES AND ASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Operating Pressure | 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 475.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Maximum Operating Temp | 100.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 500.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Pipe Wall Thickness Designation for Which Designed | STANDARD SECOND END |
| Pipe Wall Thickness Designation for Which Designed | STANDARD FIRST END |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 22 LD PRIMARY | Armstrong International Inc Dba Armstrong Machine Works (USA) |
NSN 4730-01-539-2385 is a Trap,drainage Pipe, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-539-2385 has 1 manufacturer part number on file: 22 LD (Armstrong International Inc Dba Armstrong Machine Works).
Key specifications for 22 LD: Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN; Connection Style: SOCKET (PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE FIRST END. 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.