PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6FNTX-BCap,tube

Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division · NSN 4730-00-277-5129 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-277-5129 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-277-5129. Primary manufacturer part number: 6FNTX-B.
Features
  • Cap,tube — FSC 4730
  • Thread Direction: RIGHT-HAND INTERNAL
  • Seat Angle: 30.0 DEGREES
  • Surface Treatment: CADMIUM OVERALL
  • Thread Series Designator: UNF INTERNAL
  • Thread Class: 3B INTERNAL
  • Tube Outside Diameter for Which Designed: 0.375 INCHES NOMINAL IN
  • Connection Style: FLARE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Cap,tube, cataloged under National Stock Number 4730-00-277-5129, 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 Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-277-5129
Primary Part Number6FNTX-B
Item NameCap,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division
StatusACTIVE
Thread DirectionRIGHT-HAND INTERNAL
Seat Angle30.0 DEGREES
Surface TreatmentCADMIUM OVERALL
Thread Series DesignatorUNF INTERNAL
Thread Class3B INTERNAL
Tube Outside Diameter for Which Designed0.375 INCHES NOMINAL IN
Connection StyleFLARE
Nominal Thread Size0.562 INCHES INTERNAL IN
MaterialCOPPER ALLOY OVERALL
Style DesignatorCAP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-051-200111031 INTERCHANGEABLE
Transformer,power
Staco Energy Products Co Dba Staco Energy Products Co
5330-00-198-6194 INTERCHANGEABLE
Packing,preformed
4730-00-254-2744 INTERCHANGEABLE
Elbow,pipe
6730-00-341-7782SMD338664 INTERCHANGEABLE
Blower and Housing
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6635-00-456-2919 INTERCHANGEABLE
Speed Converter
5340-00-495-32590612-10000 INTERCHANGEABLE
Shield,expansion
Star Expansion Co
5962-00-524-2036 INTERCHANGEABLE
Microcircuit,digital
6105-00-643-253011TA8-0164 INTERCHANGEABLE
Motor-Tachometer Generator
Motor Magnetics, Inc. Dba Motor Magnetics Corp
8145-00-760-363311031 INTERCHANGEABLE
Shipping and Storag
Naval Inventory Control Point
5975-00-834-6780 INTERCHANGEABLE
Chase Nipple,conduit
Cross-Reference Index
Part NumberManufacturer
10007 Tube Fitting Mfg Co Inc (USA)
6FNTX-B PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
11031 Phoenix Steel Corp (USA)
6FNTX-B Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters (USA)
6FNTX-B Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
6FNT Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters (USA)
57649-006 Tld Ace Corp Div Tld Ace (USA)
10031 Phoenix Steel Corp (USA)
A11099 PRIMARY Curtiss-Wright Controls, Inc. Div Actuation Division (USA)
6FNTX-B Parker Hannifin (australia) Pty. Limited (AUS)
Related Parts
5950-00-051-2001INTERCHANGEABLE
TRANSFORMER,POWER
11031
5330-00-198-6194INTERCHANGEABLE
PACKING,PREFORMED
4730-00-254-2744INTERCHANGEABLE
ELBOW,PIPE
6730-00-341-7782INTERCHANGEABLE
BLOWER AND HOUSING
SMD338664
6635-00-456-2919INTERCHANGEABLE
SPEED CONVERTER
5340-00-495-3259INTERCHANGEABLE
SHIELD,EXPANSION
0612-10000
5962-00-524-2036INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
6105-00-643-2530INTERCHANGEABLE
MOTOR-TACHOMETER GENERATOR
11TA8-0164
8145-00-760-3633INTERCHANGEABLE
SHIPPING AND STORAG
11031
5975-00-834-6780INTERCHANGEABLE
CHASE NIPPLE,CONDUIT
5360-01-111-1148INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2910-01-131-7862INTERCHANGEABLE
BOWL,SEDIMENT
RK11-1550

Frequently Asked Questions

What is NSN 4730-00-277-5129?

NSN 4730-00-277-5129 is a Cap,tube, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-277-5129?

NSN 4730-00-277-5129 has 10 cross-referenced part numbers: 10007 (Tube Fitting Mfg Co Inc), 6FNTX-B (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division), 11031 (Phoenix Steel Corp), 6FNTX-B (Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters), 6FNTX-B (Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division) and 5 more.

What NSN replaces 4730-00-277-5129?

There are 12 known substitutes for 4730-00-277-5129: 5950-00-051-2001, 5330-00-198-6194, 4730-00-254-2744 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6FNTX-B?

Key specifications for 6FNTX-B: Thread Direction: RIGHT-HAND INTERNAL; Seat Angle: 30.0 DEGREES; Surface Treatment: CADMIUM OVERALL; Thread Series Designator: UNF INTERNAL. 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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