The Union,pipe, cataloged under National Stock Number 4730-00-189-2645, 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 The American Society of Mechanical Engineers. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-189-2645 |
| Primary Part Number | B16.39 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | CANCELLED |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Style Designator | SCREWED |
| Nondefinitive Spec/std Data | XD TYPE |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | GROUND-JOINT |
| Thread Series Designator | NPT ALL ENDS |
| Nominal Overall Length | 1.810 INCHES IN |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Coupling Flange Shape | HEXAGON |
| Specification/standard Data | 81349-MIL-U-18250 GOVERNMENT SPECIFICATION |
| Style Designator | SCREWED |
| Seat Type | GROUND-JOINT |
| Reducer Type | CONCENTRIC |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Specification/standard Data | 81349-MIL-U-18250 GOVERNMENT SPECIFICATION |
| Surface Treatment | ZINC OVERALL |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Material | STEEL OR IRON OVERALL |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Coupling Flange Shape | HEXAGON |
| Nominal Overall Length | 1.810 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OR IRON OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| Nondefinitive Spec/std Data | XD TYPE |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
NSN 4730-00-189-2645 is a Union,pipe, manufactured by The American Society of Mechanical Engineers, classified under FSC 4730 (No Item Name Available). Status: cancelled.
NSN 4730-00-189-2645 has 2 cross-referenced part numbers: B16.39 (The American Society of Mechanical Engineers), MILU18250 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).
There are 12 known substitutes for 4730-00-189-2645: 4730-00-189-2598, 4730-00-189-2599, 4730-00-189-2600 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for B16.39: Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Style Designator: SCREWED; Nondefinitive Spec/std Data: XD TYPE; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 25 total characteristics are documented in the Federal Logistics Information System.
NSN 4730-00-189-2645 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.