PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

178685Tee,pipe to Tube

Allison Transmission Inc Dba Allison Transmission, Inc · NSN 4730-01-183-5927 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-183-5927 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-183-5927. Primary manufacturer part number: 178685.
Features
  • Tee,pipe to Tube — FSC 4730
  • Connection Type: THREADED INTERNAL TUBE SECOND END
  • Thread Quantity Per Inch: 16 FIRST END
  • Leg Length: 0.562 INCHES NOMINAL SECOND END IN
  • Thread Class: 2A FIRST END A
  • Leg Length: 0.562 INCHES NOMINAL FIRST END IN
  • Seat Angle: 42.0 DEGREES SECOND END
  • Connection Type: THREADED INTERNAL TUBE FIRST END
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 4730-01-183-5927, 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 Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-183-5927
Primary Part Number178685
Item NameTee,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAllison Transmission Inc Dba Allison Transmission, Inc
StatusACTIVE
Connection TypeTHREADED INTERNAL TUBE SECOND END
Thread Quantity Per Inch16 FIRST END
Leg Length0.562 INCHES NOMINAL SECOND END IN
Thread Class2A FIRST END A
Leg Length0.562 INCHES NOMINAL FIRST END IN
Seat Angle42.0 DEGREES SECOND END
Connection TypeTHREADED INTERNAL TUBE FIRST END
Thread Class2A SECOND END A
Seat Angle42.0 DEGREES FIRST END
Thread Quantity Per Inch16 SECOND END
Connection StyleINVERTED FLARE (TUBE) SECOND END
Connection TypeTHREADED EXTERNAL PIPE THIRD END
Nominal Thread Size0.438 INCHES FIRST END IN
Connection StylePLAIN (PIPE) THIRD END
Leg Length0.469 INCHES NOMINAL THIRD END IN
Nominal Thread Size0.438 INCHES SECOND END IN
Connection StyleINVERTED FLARE (TUBE) FIRST END
Nominal Thread Size0.125 INCHES THIRD END IN
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Thread Series DesignatorUN FIRST END
Thread Series DesignatorUN SECOND END
Nominal Outside Diameter Tube Accommodated0.250 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Thread Series DesignatorNPTF THIRD END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4730-00-287-1706SAE J512 3-3-3 040401BA INTERCHANGEABLE
Tee,tube
Sae International Dba Sae International
4730-00-287-1707SAE J512 4-4-4 040401BA INTERCHANGEABLE
Tee,tube
Sae International Dba Sae International
5962-01-141-5413178-0685 INTERCHANGEABLE
Microcircuit,linear
Autek Systems Corp
Cross-Reference Index
Part NumberManufacturer
178685 PRIMARY Allison Transmission Inc Dba Allison Transmission, Inc (USA)
CNEX6-178685-1/4X1/8 Allison Transmission Inc Dba Allison Transmission, Inc (USA)
CNEX6 Allison Transmission Inc Dba Allison Transmission, Inc (USA)
178685 Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
Related Parts
4730-00-287-1706INTERCHANGEABLE
TEE,TUBE
SAE J512 3-3-3 040401BA
4730-00-287-1707INTERCHANGEABLE
TEE,TUBE
SAE J512 4-4-4 040401BA
5962-01-141-5413INTERCHANGEABLE
MICROCIRCUIT,LINEAR
178-0685

Frequently Asked Questions

What is NSN 4730-01-183-5927?

NSN 4730-01-183-5927 is a Tee,pipe to Tube, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-183-5927?

NSN 4730-01-183-5927 has 4 cross-referenced part numbers: 178685 (Allison Transmission Inc Dba Allison Transmission, Inc), CNEX6-178685-1/4X1/8 (Allison Transmission Inc Dba Allison Transmission, Inc), CNEX6 (Allison Transmission Inc Dba Allison Transmission, Inc), 178685 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).

What NSN replaces 4730-01-183-5927?

There are 3 known substitutes for 4730-01-183-5927: 4730-00-287-1706, 4730-00-287-1707, 5962-01-141-5413. Verify interchangeability with system specifications before substitution.

What are the specifications of 178685?

Key specifications for 178685: Connection Type: THREADED INTERNAL TUBE SECOND END; Thread Quantity Per Inch: 16 FIRST END; Leg Length: 0.562 INCHES NOMINAL SECOND END IN; Thread Class: 2A FIRST END A. 25 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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