The Union,pipe, cataloged under National Stock Number 4730-00-266-3905, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-266-3905 |
| Primary Part Number | WW-U-531 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Federal Specifications Promulgated by General Services Administration Washington DC |
| Status | ACTIVE |
| Material | IRON MALLEABLE SEAT |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Style Designator | SCREWED |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Seat Type | GROUND-JOINT |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Nominal Overall Length | 1.735 INCHES IN |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Thread Series Designator | NPT ALL ENDS |
| Nondefinitive Spec/std Data | A TYPE AND 1 CLASS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| WW-U-531 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| WWU-531-03TA | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| PT1280 | Crane Co Div Valve Div (USA) |
| B16.39 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
NSN 4730-00-266-3905 is a Union,pipe, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-266-3905 has 4 cross-referenced part numbers: WW-U-531 (Federal Specifications Promulgated by General Services Administration Washington DC), WWU-531-03TA (Federal Specifications Promulgated by General Services Administration Washington DC), PT1280 (Crane Co Div Valve Div), B16.39 (American National Standards Institute Incorporated Dba American National Standards Institute).
There are 12 known substitutes for 4730-00-266-3905: 4730-00-204-3392, 4730-00-240-1670, 4730-00-240-1671 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for WW-U-531: Material: IRON MALLEABLE SEAT; Media for Which Designed: STEAM FIRST RESPONSE; Style Designator: SCREWED; Special Features: GROUND JOINT SEAT TYPE IS COPPER ALLOY. 14 total characteristics are documented in the Federal Logistics Information System.