PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-18866Elbow,pipe to Tube

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-302-6026 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-302-6026 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-302-6026. Primary manufacturer part number: MIL-DTL-18866.
Features
  • Elbow,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.500 INCHES SECOND END IN
  • Thread Series Designator: UNF FIRST END
  • Connection Style: PLAIN (PIPE) SECOND END
  • Seat Angle: 37.0 DEGREES FIRST END
  • Connection Style: FLARED (TUBE) FIRST END
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Material: STEEL CORROSION RESISTING OVERALL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Elbow,pipe to Tube, cataloged under National Stock Number 4730-01-302-6026, 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 16 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
NSN4730-01-302-6026
Primary Part NumberMIL-DTL-18866
Item NameElbow,pipe to 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
Nominal Thread Size0.500 INCHES SECOND END IN
Thread Series DesignatorUNF FIRST END
Connection StylePLAIN (PIPE) SECOND END
Seat Angle37.0 DEGREES FIRST END
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
MaterialSTEEL CORROSION RESISTING OVERALL
Thread Class2A FIRST END A
Nominal Outside Diameter Tube Accommodated0.500 INCHES FIRST END IN
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Criticality Code JustificationFEAT
Flow Angle90.0 DEGREES
Thread Series DesignatorNPTF SECOND END
Leg Length1.470 INCHES NOMINAL SECOND END IN
Leg Length1.330 INCHES NOMINAL FIRST END IN
Nominal Thread Size0.750 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-322-8462 INTERCHANGEABLE
Elbow,pipe to 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
MS51504A8-8S Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-322-8462INTERCHANGEABLE
ELBOW,PIPE TO TUBE

Frequently Asked Questions

What is NSN 4730-01-302-6026?

NSN 4730-01-302-6026 is a Elbow,pipe to 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 4730-01-302-6026?

NSN 4730-01-302-6026 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), MS51504A8-8S (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-302-6026?

There is 1 known substitute for 4730-01-302-6026: 4730-00-322-8462. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-18866?

Key specifications for MIL-DTL-18866: Nominal Thread Size: 0.500 INCHES SECOND END IN; Thread Series Designator: UNF FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Seat Angle: 37.0 DEGREES FIRST 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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