PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51F3-8X1-2X3-8Tee,pipe to Tube

Imperial · NSN 4730-00-905-1944 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-905-1944 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-905-1944. Primary manufacturer part number: 51F3-8X1-2X3-8.
Features
  • Tee,pipe to Tube — FSC 4730
  • Leg Length: 1.060 INCHES NOMINAL FIRST END IN
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Connection Type: THREADED EXTERNAL TUBE THIRD END
  • Connection Style: PLAIN (PIPE) SECOND END
  • Thread Class: 2A THIRD END A
  • Nominal Thread Size: 0.625 INCHES THIRD END IN
  • Thread Class: 2A FIRST END A
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Tee,pipe to Tube, cataloged under National Stock Number 4730-00-905-1944, 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 Imperial. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-905-1944
Primary Part Number51F3-8X1-2X3-8
Item NameTee,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerImperial
StatusACTIVE
Leg Length1.060 INCHES NOMINAL FIRST END IN
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Connection TypeTHREADED EXTERNAL TUBE THIRD END
Connection StylePLAIN (PIPE) SECOND END
Thread Class2A THIRD END A
Nominal Thread Size0.625 INCHES THIRD END IN
Thread Class2A FIRST END A
Nominal Thread Size0.500 INCHES SECOND END IN
Leg Length1.060 INCHES NOMINAL THIRD END IN
Maximum Operating Temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Leg Length1.380 INCHES NOMINAL SECOND END IN
Connection StyleFLARED (TUBE) THIRD END
Seat Angle45.0 DEGREES FIRST END
Nominal Outside Diameter Tube Accommodated0.375 INCHES FIRST END IN
Thread Series DesignatorNPTF SECOND END
Nominal Outside Diameter Tube Accommodated0.375 INCHES THIRD END IN
Thread Series DesignatorUNF FIRST END
MaterialCOPPER ALLOY OVERALL
Seat Angle45.0 DEGREES THIRD END
Thread Series DesignatorUNF THIRD END
Operating Pressure1800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size0.625 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6685-00-257-1568 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-257-1571 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-526-8483 INTERCHANGEABLE
Gage,pressure,dial Indicating
5940-00-636-60251382B INTERCHANGEABLE
Terminal Board
Birnbach Co Inc
6685-00-807-5952 INTERCHANGEABLE
Gage,pressure,dial Indicating
3439-00-856-9497 INTERCHANGEABLE
Heat Sink,soldering Aid
6695-01-108-2409 INTERCHANGEABLE
Gage,altitude and Pressure,dial
Cross-Reference Index
Part NumberManufacturer
51F3-8X1-2X3-8 Imperial (USA)
51F Imperial (USA)
Related Parts
6685-00-257-1568INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-257-1571INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-526-8483INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
5940-00-636-6025INTERCHANGEABLE
TERMINAL BOARD
1382B
6685-00-807-5952INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
3439-00-856-9497INTERCHANGEABLE
HEAT SINK,SOLDERING AID
6695-01-108-2409INTERCHANGEABLE
GAGE,ALTITUDE AND PRESSURE,DIAL

Frequently Asked Questions

What is NSN 4730-00-905-1944?

NSN 4730-00-905-1944 is a Tee,pipe to Tube, manufactured by Imperial, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-905-1944?

NSN 4730-00-905-1944 has 2 cross-referenced part numbers: 51F3-8X1-2X3-8 (Imperial), 51F (Imperial).

What NSN replaces 4730-00-905-1944?

There are 7 known substitutes for 4730-00-905-1944: 6685-00-257-1568, 6685-00-257-1571, 6685-00-526-8483 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51F3-8X1-2X3-8?

Key specifications for 51F3-8X1-2X3-8: Leg Length: 1.060 INCHES NOMINAL FIRST END IN; Connection Type: THREADED EXTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL TUBE THIRD END; Connection Style: PLAIN (PIPE) SECOND END. 24 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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