PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2021-6-4SAdapter,straight,pipe to Tube

Danfoss Power Solutions II, Llc · NSN 4730-01-123-6813 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-123-6813 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-123-6813. Primary manufacturer part number: 2021-6-4S.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Material: STEEL OVERALL
  • Connection Style: FLARED (TUBE) SECOND END
  • Connection Type: THREADED EXTERNAL PIPE FIRST END
  • Nominal Thread Size: 0.375 INCHES AND 0.437 INCHES FIRST END IN
  • Thread Class: 2A SECOND END A
  • Operating Pressure: 8000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Connection Style: PLAIN (PIPE) FIRST 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 4730-01-123-6813, 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 5 commercial cross-references from 4 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
NSN4730-01-123-6813
Primary Part Number2021-6-4S
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerDanfoss Power Solutions II, Llc
StatusACTIVE
MaterialSTEEL OVERALL
Connection StyleFLARED (TUBE) SECOND END
Connection TypeTHREADED EXTERNAL PIPE FIRST END
Nominal Thread Size0.375 INCHES AND 0.437 INCHES FIRST END IN
Thread Class2A SECOND END A
Operating Pressure8000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Connection StylePLAIN (PIPE) FIRST END
Surface TreatmentCHROMIUM AND ZINC OUTSIDE
Seat Angle37.0 DEGREES SECOND END
Nominal Overall Length1.420 INCHES IN
Pipe Wall Thickness Designation for Which DesignedSCHEDULE 80 FIRST END
Thread Series DesignatorNPT AND UNF FIRST END
Style DesignatorCENTER WRENCHING FACILITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-942-9147100001-009 INTERCHANGEABLE
Adapter,straight,pipe to Tube
North Wind Test Llc
Cross-Reference Index
Part NumberManufacturer
2021-6-4S PRIMARY Danfoss Power Solutions II, Llc (USA)
25950AX Oshkosh Corp (USA)
12303943-3 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
25950AX Oshkosh Defense Llc (USA)
12303943 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Related Parts
4730-00-942-9147INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
100001-009

Frequently Asked Questions

What is NSN 4730-01-123-6813?

NSN 4730-01-123-6813 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 4730-01-123-6813?

NSN 4730-01-123-6813 has 5 cross-referenced part numbers: 2021-6-4S (Danfoss Power Solutions II, Llc), 25950AX (Oshkosh Corp), 12303943-3 (U S Army Tank Automotive Command Amsta-Im-Mm), 25950AX (Oshkosh Defense Llc), 12303943 (U S Army Tank Automotive Command Amsta-Im-Mm).

What NSN replaces 4730-01-123-6813?

There is 1 known substitute for 4730-01-123-6813: 4730-00-942-9147. Verify interchangeability with system specifications before substitution.

What are the specifications of 2021-6-4S?

Key specifications for 2021-6-4S: Material: STEEL OVERALL; Connection Style: FLARED (TUBE) SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Nominal Thread Size: 0.375 INCHES AND 0.437 INCHES FIRST END IN. 14 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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