The Union,tube, cataloged under National Stock Number 4730-00-266-3901, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 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 | 4730-00-266-3901 |
| Primary Part Number | WWU516-45 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Nominal Outside Diameter Tube Accommodated | 1.125 INCHES ALL ENDS IN |
| Coupling Flange Shape | HEXAGON |
| Nominal Overall Length | 2.000 INCHES IN |
| Material | COPPER ALLOY TAILPIECE |
| Style Designator | SCREWED |
| Seat Type | BEVELED |
| Material | COPPER ALLOY THREAD PIECE |
| Material | COPPER ALLOY NUT |
| Connection Style | SOCKET (TUBE) ALL ENDS |
| Reducer Type | CONCENTRIC |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| WWU516-45 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| A-A-59617 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| AA59617-45 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| 402 | Kennecott Corp Chase Extrusions Div (USA) |
| 633-1 1/4 | Nibco Inc (USA) |
NSN 4730-00-266-3901 is a Union,tube, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-266-3901 has 5 cross-referenced part numbers: WWU516-45 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), A-A-59617 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), AA59617-45 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), 402 (Kennecott Corp Chase Extrusions Div), 633-1 1/4 (Nibco Inc).
There are 12 known substitutes for 4730-00-266-3901: 4730-00-088-8389, 4730-00-088-8952, 4730-00-189-2588 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for WWU516-45: Nominal Outside Diameter Tube Accommodated: 1.125 INCHES ALL ENDS IN; Coupling Flange Shape: HEXAGON; Nominal Overall Length: 2.000 INCHES IN; Material: COPPER ALLOY TAILPIECE. 12 total characteristics are documented in the Federal Logistics Information System.