PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

018025Reducer,pipe

Velvac Inc · NSN 4730-01-421-8113 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-421-8113 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-421-8113. Primary manufacturer part number: 018025.
Features
  • Reducer,pipe — FSC 4730
  • Connection Type: THREADED EXTERNAL PIPE ALL ENDS
  • Thread Series Designator: NPT ALL ENDS
  • Nominal Thread Size: 0.250 INCHES SECOND END IN
  • Nominal Thread Size: 0.375 INCHES FIRST END IN
  • 3 verified cross-references
  • Primary manufacturer: Velvac Inc
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Reducer,pipe, cataloged under National Stock Number 4730-01-421-8113, 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 Velvac Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-421-8113
Primary Part Number018025
Item NameReducer,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerVelvac Inc
StatusACTIVE
Connection TypeTHREADED EXTERNAL PIPE ALL ENDS
Thread Series DesignatorNPT ALL ENDS
Nominal Thread Size0.250 INCHES SECOND END IN
Nominal Thread Size0.375 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-01-421-8114017015 INTERCHANGEABLE
Elbow,pipe
Velvac Inc
4730-01-422-9413018023 INTERCHANGEABLE
Nipple,pipe
Velvac Inc
4730-01-422-9420017017 INTERCHANGEABLE
Elbow,pipe
Velvac Inc
4820-01-652-4166035068 INTERCHANGEABLE
Cock,shutoff,screw Stem
Velvac Inc
Cross-Reference Index
Part NumberManufacturer
6350998 Naval Sea Systems Command (USA)
6350998 ITEM 60 Naval Sea Systems Command (USA)
018025 PRIMARY Velvac Inc (USA)
Related Parts
4730-01-421-8114INTERCHANGEABLE
ELBOW,PIPE
017015
4730-01-422-9413INTERCHANGEABLE
NIPPLE,PIPE
018023
4730-01-422-9420INTERCHANGEABLE
ELBOW,PIPE
017017
4820-01-652-4166INTERCHANGEABLE
COCK,SHUTOFF,SCREW STEM
035068

Frequently Asked Questions

What is NSN 4730-01-421-8113?

NSN 4730-01-421-8113 is a Reducer,pipe, manufactured by Velvac Inc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-421-8113?

NSN 4730-01-421-8113 has 3 cross-referenced part numbers: 6350998 (Naval Sea Systems Command), 6350998 ITEM 60 (Naval Sea Systems Command), 018025 (Velvac Inc).

What NSN replaces 4730-01-421-8113?

There are 4 known substitutes for 4730-01-421-8113: 4730-01-421-8114, 4730-01-422-9413, 4730-01-422-9420 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 018025?

Key specifications for 018025: Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Thread Series Designator: NPT ALL ENDS; Nominal Thread Size: 0.250 INCHES SECOND END IN; End Item Identification: JEEP AY, DDS. 5 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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