PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

68-3-8X3-8Adapter,straight,pipe to Tube

Exello Accessories Mfg Inc · NSN 4730-00-278-4326 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-278-4326 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-278-4326. Primary manufacturer part number: 68-3-8X3-8.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.562 INCHES FIRST END IN
  • Nominal Overall Length: 0.437 INCHES IN
  • Furnished Items and Quantity: 1 SHORT COUPLING NUT
  • Thread Series Designator: NPTF SECOND END
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Seat Angle: 45.0 DEGREES FIRST END
  • Thread Series Designator: UNEF FIRST END
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 4730-00-278-4326, 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 Exello Accessories Mfg Inc. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 7 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
NSN4730-00-278-4326
Primary Part Number68-3-8X3-8
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerExello Accessories Mfg Inc
StatusACTIVE
Nominal Thread Size0.562 INCHES FIRST END IN
Nominal Overall Length0.437 INCHES IN
Furnished Items and Quantity1 SHORT COUPLING NUT
Thread Series DesignatorNPTF SECOND END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Seat Angle45.0 DEGREES FIRST END
Thread Series DesignatorUNEF FIRST END
Specification/standard Data81343-J512 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialCOPPER ALLOY OVERALL
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Connection StyleFLARED (TUBE) FIRST END
Connection StylePLAIN (PIPE) SECOND END
Thread Class2A FIRST END A
Nominal Pipe Size Accommodated0.375 INCHES SECOND END IN
Nondefinitive Spec/std Data12 FIGURE
Nominal Outside Diameter Tube Accommodated0.375 INCHES FIRST END IN
Nominal Thread Size0.375 INCHES SECOND END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5365-00-012-0968570058-1 INTERCHANGEABLE
Spacer,ring
Honeywell International Inc. Div Aerospace - Torrance
4730-00-013-7409SAE J512 8-6 040102B INTERCHANGEABLE
Adapter,straight,pipe to Tube
Sae International Dba Sae International
4730-00-014-4304101-10014 INTERCHANGEABLE
Nut,tube Coupling
Danfoss Power Solutions II, Llc
4730-00-254-6243 INTERCHANGEABLE
Tee,pipe
4730-00-277-5751151F-10-8 INTERCHANGEABLE
Tee,pipe to Tube
Parker-Hannifin Corp Div Fluid System Connector Division
4730-00-277-73257351347 INTERCHANGEABLE
Tee,pipe to Tube
U S Army Tank Automotive Command Amsta-Im-Mm
4730-00-277-7333110-58 INTERCHANGEABLE
Tee,tube
Crane Carrier Company, Llc
4730-00-277-87697413827 INTERCHANGEABLE
Adapter,straight,pipe to Tube
U S Army Tank Automotive Command Amsta-Im-Mm
4730-00-288-9418155F-12-12 INTERCHANGEABLE
Elbow,tube
Parker-Hannifin Corp Div Fluid System Connector Division
4730-00-289-1930182-12 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Dresser Industries Inc Leroi Div
Cross-Reference Index
Part NumberManufacturer
J512 Society of Automotive Engineers Inc (USA)
E68X6B Dana Corp Weatherhead Div (USA)
6-4 060102B Society of Automotive Engineers Inc (USA)
6-4 060102B Sae International Dba Sae International (USA)
68-3-8X3-8 PRIMARY Exello Accessories Mfg Inc (USA)
SAE-J512 Sae International Dba Sae International (USA)
570058 CAGE 00000
MILF1224 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
68F38X3-8 Imperial (USA)
E68X6B Danfoss Power Solutions II, Llc (USA)
J512 Sae International Dba Sae International (USA)
SAE J512 6-4 060102B PRIMARY Sae International Dba Sae International (USA)
Related Parts
5365-00-012-0968INTERCHANGEABLE
SPACER,RING
570058-1
4730-00-013-7409INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
SAE J512 8-6 040102B
4730-00-014-4304INTERCHANGEABLE
NUT,TUBE COUPLING
101-10014
4730-00-254-6243INTERCHANGEABLE
TEE,PIPE
4730-00-277-5751INTERCHANGEABLE
TEE,PIPE TO TUBE
151F-10-8
4730-00-277-7325INTERCHANGEABLE
TEE,PIPE TO TUBE
7351347
4730-00-277-7333INTERCHANGEABLE
TEE,TUBE
110-58
4730-00-277-8769INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
7413827
4730-00-288-9418INTERCHANGEABLE
ELBOW,TUBE
155F-12-12
4730-00-289-1930INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
182-12
5950-00-784-0475INTERCHANGEABLE
COIL,RADIO FREQUENCY
3178091-1
4730-00-873-3885INTERCHANGEABLE
NIPPLE,TUBE
SAE J512 8-8 010101BA

Frequently Asked Questions

What is NSN 4730-00-278-4326?

NSN 4730-00-278-4326 is a Adapter,straight,pipe to Tube, manufactured by Exello Accessories Mfg Inc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-278-4326?

NSN 4730-00-278-4326 has 12 cross-referenced part numbers: J512 (Society of Automotive Engineers Inc), E68X6B (Dana Corp Weatherhead Div), 6-4 060102B (Society of Automotive Engineers Inc), 6-4 060102B (Sae International Dba Sae International), 68-3-8X3-8 (Exello Accessories Mfg Inc) and 7 more.

What NSN replaces 4730-00-278-4326?

There are 12 known substitutes for 4730-00-278-4326: 5365-00-012-0968, 4730-00-013-7409, 4730-00-014-4304 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 68-3-8X3-8?

Key specifications for 68-3-8X3-8: Nominal Thread Size: 0.562 INCHES FIRST END IN; Nominal Overall Length: 0.437 INCHES IN; Furnished Items and Quantity: 1 SHORT COUPLING NUT; Thread Series Designator: NPTF SECOND END. 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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