PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3150-4112Spacer,flexible,pipeline

Unaflex Inc. · NSN 4730-00-401-3751 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-401-3751 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-401-3751. Primary manufacturer part number: 3150-4112.
Features
  • Spacer,flexible,pipeline — FSC 4730
  • Inside Diameter: 2.500 INCHES NOMINAL IN
  • Flange Thickness: 0.625 INCHES NOMINAL IN
  • Body Length: 10.750 INCHES NOMINAL IN
  • Thickness: 0.562 INCHES NOMINAL IN
  • Style Designator: ROUND
  • Material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR AND PLASTIC POLYESTER
  • Outside Diameter: 6.125 INCHES NOMINAL IN
Applications
  • Applications requiring Rubber Isobutylene-Isoprene Class Iir and Plastic Polyester construction
General Description

The Spacer,flexible,pipeline, cataloged under National Stock Number 4730-00-401-3751, 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 Unaflex Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-401-3751
Primary Part Number3150-4112
Item NameSpacer,flexible,pipeline
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerUnaflex Inc.
StatusACTIVE
Inside Diameter2.500 INCHES NOMINAL IN
Flange Thickness0.625 INCHES NOMINAL IN
Body Length10.750 INCHES NOMINAL IN
Thickness0.562 INCHES NOMINAL IN
Style DesignatorROUND
MaterialRUBBER ISOBUTYLENE-ISOPRENE CLASS IIR AND PLASTIC POLYESTER
Outside Diameter6.125 INCHES NOMINAL IN
Flange Height1.812 INCHES NOMINAL IN
Fabrication MethodMOLDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4730-00-192-88961-15-518 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-88982-15-618 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-88991-15-824 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-89002-15-2512 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-89022-15-315 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-89042-15-415 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4730-00-192-89052-15-518 INTERCHANGEABLE
Spacer,flexible,pipeline
La Favorite Industries Inc.
4720-01-028-17911-15-212 INTERCHANGEABLE
Hose Assembly,nonmetallic
La Favorite Industries Inc.
Cross-Reference Index
Part NumberManufacturer
3150-4112 PRIMARY Unaflex Inc. (USA)
1-15-2512 La Favorite Industries Inc. (USA)
94000-1161 Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
CS4730-0130-2-1/2X12 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
3212-0212 Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
CS4730-0130 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
3111-7012-11-70 PRIMARY Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
75-2512-22FP Flow-Flex Engineering Co Div of Dearborn Rubber Corp (USA)
FP-075188 Flow-Flex Engineering Co Div of Dearborn Rubber Corp (USA)
Related Parts
4730-00-192-8896INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
1-15-518
4730-00-192-8898INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
2-15-618
4730-00-192-8899INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
1-15-824
4730-00-192-8900INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
2-15-2512
4730-00-192-8902INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
2-15-315
4730-00-192-8904INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
2-15-415
4730-00-192-8905INTERCHANGEABLE
SPACER,FLEXIBLE,PIPELINE
2-15-518
4720-01-028-1791INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
1-15-212

Frequently Asked Questions

What is NSN 4730-00-401-3751?

NSN 4730-00-401-3751 is a Spacer,flexible,pipeline, manufactured by Unaflex Inc., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-401-3751?

NSN 4730-00-401-3751 has 9 cross-referenced part numbers: 3150-4112 (Unaflex Inc.), 1-15-2512 (La Favorite Industries Inc.), 94000-1161 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc), CS4730-0130-2-1/2X12 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)), 3212-0212 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc) and 4 more.

What NSN replaces 4730-00-401-3751?

There are 8 known substitutes for 4730-00-401-3751: 4730-00-192-8896, 4730-00-192-8898, 4730-00-192-8899 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3150-4112?

Key specifications for 3150-4112: Inside Diameter: 2.500 INCHES NOMINAL IN; Flange Thickness: 0.625 INCHES NOMINAL IN; Body Length: 10.750 INCHES NOMINAL IN; Thickness: 0.562 INCHES NOMINAL IN. 10 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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