PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

437-251Reducer,pipe

George Fischer Sloane, Inc. · NSN 4730-01-171-3340 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-171-3340 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-171-3340. Primary manufacturer part number: 437-251.
Features
  • Reducer,pipe — FSC 4730
  • Specification/standard Data: 81346-ANSI/ASTMD2466 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
  • Connection Style: PLAIN (TUBE) ALL ENDS
  • Reducer Type: CONCENTRIC
  • Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN
  • Material: PLASTIC POLYVINYL CHLORIDE (PVC) OVERALL
  • Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
  • Nominal Overall Length: 3.000 INCHES IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Plastic Polyvinyl Chloride (pvc) Overall construction
General Description

The Reducer,pipe, cataloged under National Stock Number 4730-01-171-3340, 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 George Fischer Sloane, Inc.. Government technical data includes 9 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-171-3340
Primary Part Number437-251
Item NameReducer,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerGeorge Fischer Sloane, Inc.
StatusACTIVE
Specification/standard Data81346-ANSI/ASTMD2466 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Connection StylePLAIN (TUBE) ALL ENDS
Reducer TypeCONCENTRIC
Nominal Pipe Size Accommodated2.000 INCHES FIRST END IN
MaterialPLASTIC POLYVINYL CHLORIDE (PVC) OVERALL
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Nominal Overall Length3.000 INCHES IN
Nominal Pipe Size Accommodated1.500 INCHES SECOND END IN
Pipe Wall Thickness Designation for Which DesignedSCHEDULE 40 ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4730-00-415-1368402-094 INTERCHANGEABLE
Tee,pipe
George Fischer Sloane, Inc.
4730-00-472-5058D2466 COUPLING NPS 3/4 PVCI INTERCHANGEABLE
Coupling,pipe
American Society for Testing and Materials Dba Astm International
4730-00-476-7136D2466 90 ELBOW NPS 3/4 PVCI INTERCHANGEABLE
Elbow,pipe
American Society for Testing and Materials Dba Astm International
4730-00-517-7879542-4800-1415687PCF19PVC INTERCHANGEABLE
Tee,pipe
Naval Sea Systems Command
4730-00-837-1110407-015 INTERCHANGEABLE
Elbow,pipe
Nibco Inc Chemtrol Div
4730-00-851-4715 INTERCHANGEABLE
Elbow,pipe
4730-00-891-7671 INTERCHANGEABLE
Reducer,pipe
4730-01-011-8253 INTERCHANGEABLE
Elbow,pipe
4730-01-185-2358 INTERCHANGEABLE
Reducer,pipe
4730-01-207-0446 INTERCHANGEABLE
Elbow,pipe
Cross-Reference Index
Part NumberManufacturer
437-251 George Fischer Sloane, Inc. (USA)
D2466 American Society for Testing and Materials Dba Astm International (USA)
ASTM-D2466 American Society for Testing and Materials Dba Astm International (USA)
Related Parts
4730-00-415-1368INTERCHANGEABLE
TEE,PIPE
402-094
4730-00-472-5058INTERCHANGEABLE
COUPLING,PIPE
D2466 COUPLING NPS 3/4 PVCI
4730-00-476-7136INTERCHANGEABLE
ELBOW,PIPE
D2466 90 ELBOW NPS 3/4 PVCI
4730-00-517-7879INTERCHANGEABLE
TEE,PIPE
542-4800-1415687PCF19PVC
4730-00-837-1110INTERCHANGEABLE
ELBOW,PIPE
407-015
4730-00-851-4715INTERCHANGEABLE
ELBOW,PIPE
4730-00-891-7671INTERCHANGEABLE
REDUCER,PIPE
4730-01-011-8253INTERCHANGEABLE
ELBOW,PIPE
4730-01-185-2358INTERCHANGEABLE
REDUCER,PIPE
4730-01-207-0446INTERCHANGEABLE
ELBOW,PIPE
4520-01-307-5714INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,IMMER
D2466

Frequently Asked Questions

What is NSN 4730-01-171-3340?

NSN 4730-01-171-3340 is a Reducer,pipe, manufactured by George Fischer Sloane, Inc., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-171-3340?

NSN 4730-01-171-3340 has 3 cross-referenced part numbers: 437-251 (George Fischer Sloane, Inc.), D2466 (American Society for Testing and Materials Dba Astm International), ASTM-D2466 (American Society for Testing and Materials Dba Astm International).

What NSN replaces 4730-01-171-3340?

There are 11 known substitutes for 4730-01-171-3340: 4730-00-415-1368, 4730-00-472-5058, 4730-00-476-7136 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 437-251?

Key specifications for 437-251: Specification/standard Data: 81346-ANSI/ASTMD2466 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION; Connection Style: PLAIN (TUBE) ALL ENDS; Reducer Type: CONCENTRIC; Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN. 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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