PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W1037Reducer,tube

Mueller Brass Co. · NSN 4730-00-995-9667 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-995-9667 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-995-9667. Primary manufacturer part number: W1037.
Features
  • Reducer,tube — FSC 4730
  • Nominal Overall Length: 1.437 INCHES IN
  • Nominal Outside Diameter Tube Accommodated: 0.375 INCHES SECOND END IN
  • Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN
  • Tubing Wall Nominal Thickness for Which Designed: 0.035 INCHES FIRST END IN
  • Connection Style: SOCKET (TUBE) FIRST END
  • Material: COPPER ALLOY OVERALL
  • Connection Type: UNTHREADED INTERNAL TUBE FIRST END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Reducer,tube, cataloged under National Stock Number 4730-00-995-9667, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-995-9667
Primary Part NumberW1037
Item NameReducer,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusCANCELLED
Nominal Overall Length1.437 INCHES IN
Nominal Outside Diameter Tube Accommodated0.375 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated0.750 INCHES FIRST END IN
Tubing Wall Nominal Thickness for Which Designed0.035 INCHES FIRST END IN
Connection StyleSOCKET (TUBE) FIRST END
MaterialCOPPER ALLOY OVERALL
Connection TypeUNTHREADED INTERNAL TUBE FIRST END
Connection TypeUNTHREADED INTERNAL TUBE SECOND END
Connection StyleSOCKET (TUBE) SECOND END
Tubing Wall Nominal Thickness for Which Designed0.032 INCHES SECOND END IN
Reducer TypeCONCENTRIC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5998-00-167-9615900165-7 INTERCHANGEABLE
Circuit Card Assembly
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
4730-00-289-4825 INTERCHANGEABLE
Coupling,tube
4730-00-289-485275431A INTERCHANGEABLE
Reducer,tube
Air Products & Chemicals, Inc
Cross-Reference Index
Part NumberManufacturer
W1037 PRIMARY Mueller Brass Co. (USA)
62400-57 Engineered Air Systems, Inc. Dba Drs Sustainment Systems (USA)
A40-3TABLE5 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
Related Parts
5998-00-167-9615INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
900165-7
4730-00-289-4825INTERCHANGEABLE
COUPLING,TUBE
4730-00-289-4852INTERCHANGEABLE
REDUCER,TUBE
75431A

Frequently Asked Questions

What is NSN 4730-00-995-9667?

NSN 4730-00-995-9667 is a Reducer,tube, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-995-9667?

NSN 4730-00-995-9667 has 3 cross-referenced part numbers: W1037 (Mueller Brass Co.), 62400-57 (Engineered Air Systems, Inc. Dba Drs Sustainment Systems), A40-3TABLE5 (American National Standards Institute Incorporated Dba American National Standards Institute).

What NSN replaces 4730-00-995-9667?

There are 3 known substitutes for 4730-00-995-9667: 5998-00-167-9615, 4730-00-289-4825, 4730-00-289-4852. Verify interchangeability with system specifications before substitution.

What are the specifications of W1037?

Key specifications for W1037: Nominal Overall Length: 1.437 INCHES IN; Nominal Outside Diameter Tube Accommodated: 0.375 INCHES SECOND END IN; Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN; Tubing Wall Nominal Thickness for Which Designed: 0.035 INCHES FIRST END IN. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-995-9667 still in active supply?

NSN 4730-00-995-9667 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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