PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W1381Reducer,tube

Mueller Brass Co. · NSN 4730-00-809-9659 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-809-9659 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-809-9659. Primary manufacturer part number: W1381.
Features
  • Reducer,tube — FSC 4730
  • Nominal Outside Diameter Tube Accommodated: 3.125 INCHES SECOND END IN
  • Connection Style: PLAIN (TUBE) SECOND END
  • Nominal Overall Length: 4.000 INCHES IN
  • Connection Style: SOCKET (TUBE) FIRST END
  • Connection Type: UNTHREADED INTERNAL TUBE FIRST END
  • Connection Type: UNTHREADED EXTERNAL TUBE SECOND END
  • Material: COPPER ALLOY OVERALL
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 4730-00-809-9659, 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 9 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-809-9659
Primary Part NumberW1381
Item NameReducer,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusACTIVE
Nominal Outside Diameter Tube Accommodated3.125 INCHES SECOND END IN
Connection StylePLAIN (TUBE) SECOND END
Nominal Overall Length4.000 INCHES IN
Connection StyleSOCKET (TUBE) FIRST END
Connection TypeUNTHREADED INTERNAL TUBE FIRST END
Connection TypeUNTHREADED EXTERNAL TUBE SECOND END
MaterialCOPPER ALLOY OVERALL
Reducer TypeCONCENTRIC
Nominal Outside Diameter Tube Accommodated3.625 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6130-00-419-4334424100 INTERCHANGEABLE
Power Supply
Ward Leonard Ct Llc
Cross-Reference Index
Part NumberManufacturer
58893-5850 Tld Ace Corp Div Tld Ace (USA)
W1381 PRIMARY Mueller Brass Co. (USA)
Related Parts
6130-00-419-4334INTERCHANGEABLE
POWER SUPPLY
424100

Frequently Asked Questions

What is NSN 4730-00-809-9659?

NSN 4730-00-809-9659 is a Reducer,tube, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-809-9659?

NSN 4730-00-809-9659 has 2 cross-referenced part numbers: 58893-5850 (Tld Ace Corp Div Tld Ace), W1381 (Mueller Brass Co.).

What NSN replaces 4730-00-809-9659?

There is 1 known substitute for 4730-00-809-9659: 6130-00-419-4334. Verify interchangeability with system specifications before substitution.

What are the specifications of W1381?

Key specifications for W1381: Nominal Outside Diameter Tube Accommodated: 3.125 INCHES SECOND END IN; Connection Style: PLAIN (TUBE) SECOND END; Nominal Overall Length: 4.000 INCHES IN; Connection Style: SOCKET (TUBE) FIRST END. 9 total characteristics are documented in the Federal Logistics Information System.

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