PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W-1225Adapter,straight,pipe to Tube

Mueller Brass Co. · NSN 4730-00-266-1813 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-266-1813 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-266-1813. Primary manufacturer part number: W-1225.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.375 INCHES SECOND END IN
  • Connection Style: PLAIN (PIPE) SECOND END
  • Connection Type: THREADED INTERNAL PIPE SECOND END
  • Tubing Wall Nominal Thickness for Which Designed: 0.032 INCHES FIRST END IN
  • Connection Type: UNTHREADED INTERNAL TUBE FIRST END
  • Thread Series Designator: NPT SECOND END
  • Nominal Overall Length: 0.531 INCHES IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-266-1813, 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 Mueller Brass Co.. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-266-1813
Primary Part NumberW-1225
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusCANCELLED
Nominal Thread Size0.375 INCHES SECOND END IN
Connection StylePLAIN (PIPE) SECOND END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Tubing Wall Nominal Thickness for Which Designed0.032 INCHES FIRST END IN
Connection TypeUNTHREADED INTERNAL TUBE FIRST END
Thread Series DesignatorNPT SECOND END
Nominal Overall Length0.531 INCHES IN
MaterialCOPPER ALLOY OVERALL
Nominal Outside Diameter Tube Accommodated0.500 INCHES FIRST END IN
Connection StyleSOCKET (TUBE) FIRST END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
2940-00-024-1973E525 INTERCHANGEABLE
Air Cleaner,intake
Donaldson Company, Inc.
5133-00-838-5368 INTERCHANGEABLE
Drill,twist
5935-00-958-1955603331-8 INTERCHANGEABLE
Connector,receptacle,electrical
Honeywell International Inc. Dba Honeywell International
4730-01-152-74942086848-1 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Raytheon Company Dba Raytheon
5120-01-669-146860338 INTERCHANGEABLE
Socket,socket Wrench
Wiha Quality Tools
Cross-Reference Index
Part NumberManufacturer
B16-22-63 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
W-1225 PRIMARY Mueller Brass Co. (USA)
B16-22-1951 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
603 3/8 Nibco Inc (USA)
W1225STYLEWC402 Mueller Brass Co. (USA)
Related Parts
2940-00-024-1973INTERCHANGEABLE
AIR CLEANER,INTAKE
E525
5133-00-838-5368INTERCHANGEABLE
DRILL,TWIST
5935-00-958-1955INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
603331-8
4730-01-152-7494INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
2086848-1
5120-01-669-1468INTERCHANGEABLE
SOCKET,SOCKET WRENCH
60338

Frequently Asked Questions

What is NSN 4730-00-266-1813?

NSN 4730-00-266-1813 is a Adapter,straight,pipe to Tube, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-266-1813?

NSN 4730-00-266-1813 has 5 cross-referenced part numbers: B16-22-63 (American National Standards Institute Incorporated Dba American National Standards Institute), W-1225 (Mueller Brass Co.), B16-22-1951 (American National Standards Institute Incorporated Dba American National Standards Institute), 603 3/8 (Nibco Inc), W1225STYLEWC402 (Mueller Brass Co.).

What NSN replaces 4730-00-266-1813?

There are 5 known substitutes for 4730-00-266-1813: 2940-00-024-1973, 5133-00-838-5368, 5935-00-958-1955 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of W-1225?

Key specifications for W-1225: Nominal Thread Size: 0.375 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) SECOND END; Connection Type: THREADED INTERNAL PIPE SECOND END; Tubing Wall Nominal Thickness for Which Designed: 0.032 INCHES FIRST END IN. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-266-1813 still in active supply?

NSN 4730-00-266-1813 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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