PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

68AB-4-6Adapter,straight,pipe to Tube

Parker-Hannifin Corp Div Fluid System Connector Division · NSN 4730-01-105-3557 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-105-3557 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-105-3557. Primary manufacturer part number: 68AB-4-6.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nondefinitive Spec/std Data: 1A FIGURE A
  • Furnished Items and Quantity: 1 LONG COUPLING NUT
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Specification/standard Data: 81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nominal Overall Length: 1.690 INCHES IN
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Nominal Thread Size: 0.375 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 4730-01-105-3557, 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 Corp Div Fluid System Connector Division. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-105-3557
Primary Part Number68AB-4-6
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerParker-Hannifin Corp Div Fluid System Connector Division
StatusACTIVE
Nondefinitive Spec/std Data1A FIGURE A
Furnished Items and Quantity1 LONG COUPLING NUT
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Specification/standard Data81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nominal Overall Length1.690 INCHES IN
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Nominal Thread Size0.375 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Thread Series DesignatorNPTF SECOND END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Thread Pitch Diameters+0.4055 TO 0.4093 INCHES FIRST END IN
Connection StylePLAIN (PIPE) SECOND END
Connection StyleFLARELESS (TUBE) FIRST END
Seat Angle20.0 DEGREES FIRST END
Thread Quantity Per Inch24 FIRST END
Thread Series DesignatorUNS FIRST END
Nominal Thread Size0.438 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5940-00-258-540610-411-2-01 INTERCHANGEABLE
Terminal,stud
Concord Electronics, Inc.
9540-01-300-285952735 INTERCHANGEABLE
Angle,structural
Aluminum Co of America
Cross-Reference Index
Part NumberManufacturer
68AB-4-6 PRIMARY Parker-Hannifin Corp Div Fluid System Connector Division (USA)
VS68AB-4-6 PRIMARY Parker-Hannifin Corp Div Fluid System Connector Division (USA)
J246 Sae International Dba Sae International (USA)
4-6 120102BA Society of Automotive Engineers Inc (USA)
4-6 120102BA PRIMARY Sae International Dba Sae International (USA)
52735 Midland Brake Inc Div of Echlin Inc (USA)
J246 Society of Automotive Engineers Inc (USA)
H-168-4X6 Velvac Inc (USA)
836-0502B6003-13 Wheeler Fleet Solutions, Co. (USA)
Related Parts
5940-00-258-5406INTERCHANGEABLE
TERMINAL,STUD
10-411-2-01
9540-01-300-2859INTERCHANGEABLE
ANGLE,STRUCTURAL
52735

Frequently Asked Questions

What is NSN 4730-01-105-3557?

NSN 4730-01-105-3557 is a Adapter,straight,pipe to Tube, manufactured by Parker-Hannifin Corp Div Fluid System Connector Division, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-105-3557?

NSN 4730-01-105-3557 has 9 cross-referenced part numbers: 68AB-4-6 (Parker-Hannifin Corp Div Fluid System Connector Division), VS68AB-4-6 (Parker-Hannifin Corp Div Fluid System Connector Division), J246 (Sae International Dba Sae International), 4-6 120102BA (Society of Automotive Engineers Inc), 4-6 120102BA (Sae International Dba Sae International) and 4 more.

What NSN replaces 4730-01-105-3557?

There are 2 known substitutes for 4730-01-105-3557: 5940-00-258-5406, 9540-01-300-2859. Verify interchangeability with system specifications before substitution.

What are the specifications of 68AB-4-6?

Key specifications for 68AB-4-6: Nondefinitive Spec/std Data: 1A FIGURE A; Furnished Items and Quantity: 1 LONG COUPLING NUT; Connection Type: THREADED EXTERNAL TUBE FIRST END; Specification/standard Data: 81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD. 17 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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