PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-18866Tee,tube

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-413-1974 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-413-1974 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-413-1974. Primary manufacturer part number: MIL-DTL-18866.
Features
  • Tee,tube — FSC 4730
  • Thread Series Designator: UN ALL ENDS
  • Leg Length: 1.810 INCHES NOMINAL SECOND END IN
  • Leg Length: 2.000 INCHES NOMINAL FIRST END IN
  • Nominal Thread Size: 1.312 INCHES ALL ENDS IN
  • Leg Length: 1.810 INCHES NOMINAL THIRD END IN
  • Thread Quantity Per Inch: 12 ALL ENDS
  • 2 verified cross-references
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Tee,tube, cataloged under National Stock Number 4730-01-413-1974, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-413-1974
Primary Part NumberMIL-DTL-18866
Item NameTee,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread Series DesignatorUN ALL ENDS
Leg Length1.810 INCHES NOMINAL SECOND END IN
Leg Length2.000 INCHES NOMINAL FIRST END IN
Nominal Thread Size1.312 INCHES ALL ENDS IN
Leg Length1.810 INCHES NOMINAL THIRD END IN
Thread Quantity Per Inch12 ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-827-5852 INTERCHANGEABLE
Tee,tube
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS51523B16 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-827-5852INTERCHANGEABLE
TEE,TUBE

Frequently Asked Questions

What is NSN 4730-01-413-1974?

NSN 4730-01-413-1974 is a Tee,tube, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-413-1974?

NSN 4730-01-413-1974 has 2 cross-referenced part numbers: MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS51523B16 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-413-1974?

There is 1 known substitute for 4730-01-413-1974: 4730-00-827-5852. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-18866?

Key specifications for MIL-DTL-18866: Thread Series Designator: UN ALL ENDS; Leg Length: 1.810 INCHES NOMINAL SECOND END IN; Leg Length: 2.000 INCHES NOMINAL FIRST END IN; Nominal Thread Size: 1.312 INCHES ALL ENDS IN. 7 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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