PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2018-2-4SAdapter,straight,pipe to Tube

Danfoss Power Solutions II, Llc · NSN 4730-01-331-2850 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-331-2850 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-331-2850. Primary manufacturer part number: 2018-2-4S.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Material: STEEL OVERALL
  • Thread Class: 2B FIRST END
  • Nominal Overall Length: 1.300 INCHES IN
  • Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
  • Connection Style: PLAIN (PIPE) SECOND END
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Thread Series Designator: NPT SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-01-331-2850, 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 Danfoss Power Solutions II, Llc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-331-2850
Primary Part Number2018-2-4S
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerDanfoss Power Solutions II, Llc
StatusACTIVE
MaterialSTEEL OVERALL
Thread Class2B FIRST END
Nominal Overall Length1.300 INCHES IN
Connection StyleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
Connection StylePLAIN (PIPE) SECOND END
Nominal Thread Size0.438 INCHES FIRST END IN
Thread Series DesignatorNPT SECOND END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Seat Angle37.0 DEGREES FIRST END
Nominal Thread Size0.125 INCHES SECOND END IN
Connection TypeTHREADED INTERNAL TUBE FIRST END
Thread Series DesignatorUNF FIRST END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5315-00-010-3708103708 INTERCHANGEABLE
Pin,straight,headless
Us Army Aviation and Missile Command
5970-00-677-8364103708 INTERCHANGEABLE
Insulator,bushing
Triumph Thermal Systems - Maryland, Inc.
6640-00-764-2245NM320 INTERCHANGEABLE
Detergent,glassware and Instrume
Steris Corporation Dba Steris Applied Sterilization Technololgies
6530-01-339-6927103708 INTERCHANGEABLE
Cleaning Solution,sterilizer and
Steris Corporation Dba Steris Applied Sterilization Technololgies
1680-01-549-954788206-10 INTERCHANGEABLE
Actuator,electro-Mechanical,line
Thomas Instrument, Incorporated
Cross-Reference Index
Part NumberManufacturer
103708 North Wind Test Llc (USA)
88-20610 Department of Defense Project Manager-Mobile Electric Power (USA)
103708-001 North Wind Test Llc (USA)
4-26X-S Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
88-20610-1 Department of Defense Project Manager-Mobile Electric Power (USA)
2018-2-4S PRIMARY Danfoss Power Solutions II, Llc (USA)
4-26X-S Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
Related Parts
5315-00-010-3708INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
103708
5970-00-677-8364INTERCHANGEABLE
INSULATOR,BUSHING
103708
6640-00-764-2245INTERCHANGEABLE
DETERGENT,GLASSWARE AND INSTRUME
NM320
6530-01-339-6927INTERCHANGEABLE
CLEANING SOLUTION,STERILIZER AND
103708
1680-01-549-9547INTERCHANGEABLE
ACTUATOR,ELECTRO-MECHANICAL,LINE
88206-10

Frequently Asked Questions

What is NSN 4730-01-331-2850?

NSN 4730-01-331-2850 is a Adapter,straight,pipe to Tube, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-331-2850?

NSN 4730-01-331-2850 has 7 cross-referenced part numbers: 103708 (North Wind Test Llc), 88-20610 (Department of Defense Project Manager-Mobile Electric Power), 103708-001 (North Wind Test Llc), 4-26X-S (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division), 88-20610-1 (Department of Defense Project Manager-Mobile Electric Power) and 2 more.

What NSN replaces 4730-01-331-2850?

There are 5 known substitutes for 4730-01-331-2850: 5315-00-010-3708, 5970-00-677-8364, 6640-00-764-2245 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2018-2-4S?

Key specifications for 2018-2-4S: Material: STEEL OVERALL; Thread Class: 2B FIRST END; Nominal Overall Length: 1.300 INCHES IN; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END. 13 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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