PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

552-1-4X1-4Adapter,straight,pipe to Tube

United Technologies Automotive Inc Components Div · NSN 4730-00-723-5549 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-723-5549 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-723-5549. Primary manufacturer part number: 552-1-4X1-4.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Seat Angle: 45.0 DEGREES FIRST END
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Nominal Overall Length: 1.125 INCHES IN
  • Thread Class: 3A FIRST END A
  • Connection Style: FLARED (TUBE) FIRST END
  • Nominal Pipe Size Accommodated: 0.250 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-723-5549, 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 United Technologies Automotive Inc Components Div. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN4730-00-723-5549
Primary Part Number552-1-4X1-4
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerUnited Technologies Automotive Inc Components Div
StatusACTIVE
Nominal Thread Size0.438 INCHES FIRST END IN
Seat Angle45.0 DEGREES FIRST END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Nominal Overall Length1.125 INCHES IN
Thread Class3A FIRST END A
Connection StyleFLARED (TUBE) FIRST END
Nominal Pipe Size Accommodated0.250 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Connection StylePLAIN (PIPE) SECOND END
Thread Series DesignatorNPT SECOND END
Nominal Thread Size0.250 INCHES SECOND END IN
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Reduced Passage Nominal Inside Diameter0.187 INCHES FIRST END IN
Thread Series DesignatorUNF FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5307-00-217-06904844 INTERCHANGEABLE
Stud,plain
Brinkley Technology Group Llc Dba Hercules Manufacturing
3439-00-372-3480BB-4 INTERCHANGEABLE
Desoldering Wick
Eis Inc Dba Com-Kyl,div of Eis
5815-00-412-91254844 INTERCHANGEABLE
Stiffener,contact
Lucent Technologies Inc Corporate Headquarters
5331-00-580-5053485GOV INTERCHANGEABLE
O-Ring
Dill Air Controls Products Llc Dba Dill Air Controls Products Llc
5950-00-593-524148-44 INTERCHANGEABLE
Coil,radio Frequency
Keysight Technologies Inc
5307-00-695-65514844 INTERCHANGEABLE
Stud,plain
Clark Material Handling Company
5330-01-474-98014844 INTERCHANGEABLE
Gasket
Bunn-O-Matic Corporation Div Government Sales
5331-01-498-79464844 INTERCHANGEABLE
O-Ring
Amw Cuyuna Engine Co. Inc Dba Two Stroke International
Cross-Reference Index
Part NumberManufacturer
FU2-C2 Brass Craft Mfg Co Sub of Masco Corp (USA)
552-1-4X1-4 PRIMARY United Technologies Automotive Inc Components Div (USA)
JD659 Jenny Products, Inc (USA)
48-4-4 Brass Craft Mfg Co Sub of Masco Corp (USA)
Related Parts
5307-00-217-0690INTERCHANGEABLE
STUD,PLAIN
4844
3439-00-372-3480INTERCHANGEABLE
DESOLDERING WICK
BB-4
5815-00-412-9125INTERCHANGEABLE
STIFFENER,CONTACT
4844
5331-00-580-5053INTERCHANGEABLE
O-RING
485GOV
5950-00-593-5241INTERCHANGEABLE
COIL,RADIO FREQUENCY
48-44
5307-00-695-6551INTERCHANGEABLE
STUD,PLAIN
4844
5330-01-474-9801INTERCHANGEABLE
GASKET
4844
5331-01-498-7946INTERCHANGEABLE
O-RING
4844

Frequently Asked Questions

What is NSN 4730-00-723-5549?

NSN 4730-00-723-5549 is a Adapter,straight,pipe to Tube, manufactured by United Technologies Automotive Inc Components Div, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-723-5549?

NSN 4730-00-723-5549 has 4 cross-referenced part numbers: FU2-C2 (Brass Craft Mfg Co Sub of Masco Corp), 552-1-4X1-4 (United Technologies Automotive Inc Components Div), JD659 (Jenny Products, Inc), 48-4-4 (Brass Craft Mfg Co Sub of Masco Corp).

What NSN replaces 4730-00-723-5549?

There are 8 known substitutes for 4730-00-723-5549: 5307-00-217-0690, 3439-00-372-3480, 5815-00-412-9125 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 552-1-4X1-4?

Key specifications for 552-1-4X1-4: Nominal Thread Size: 0.438 INCHES FIRST END IN; Seat Angle: 45.0 DEGREES FIRST END; Connection Type: THREADED EXTERNAL PIPE SECOND END; Nominal Overall Length: 1.125 INCHES IN. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com