PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-18866Sleeve,flared,tube Fitting

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-126-7757 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-126-7757 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-126-7757. Primary manufacturer part number: MIL-DTL-18866.
Features
  • Sleeve,flared,tube Fitting — FSC 4730
  • Specification/standard Data: 96906-MS51533 GOVERNMENT STANDARD
  • Sleeve Outside Diameter: 1.510 INCHES NOMINAL IN
  • Flange Outside Diameter: 1.784 INCHES NOMINAL IN
  • Seat Angle in Deg: 37.0
  • Hose/tube Outside Diameter for Which Designed: 1.500 INCHES NOMINAL IN
  • Flange Width: 0.340 INCHES NOMINAL IN
  • Surface Treatment: PASSIVATE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 316 construction
General Description

The Sleeve,flared,tube Fitting, cataloged under National Stock Number 4730-01-126-7757, 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 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-126-7757
Primary Part NumberMIL-DTL-18866
Item NameSleeve,flared,tube Fitting
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Specification/standard Data96906-MS51533 GOVERNMENT STANDARD
Sleeve Outside Diameter1.510 INCHES NOMINAL IN
Flange Outside Diameter1.784 INCHES NOMINAL IN
Seat Angle in Deg37.0
Hose/tube Outside Diameter for Which Designed1.500 INCHES NOMINAL IN
Flange Width0.340 INCHES NOMINAL IN
Surface TreatmentPASSIVATE
MaterialSTEEL COMP 316
Style DesignatorSLEEVE
Casehardening IndicatorNOT CASEHARDENED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-00-943-7175 INTERCHANGEABLE
Tee,pipe to Tube
4820-01-225-5795583-1 1/2D1 INTERCHANGEABLE
Valve,check
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
4710-01-230-68714693042-2 INTERCHANGEABLE
Tube Assembly,metal
Naval Air Warfare Center Weapons Div
4730-01-541-577924TX-SS INTERCHANGEABLE
Sleeve,flared,tube Fitting
Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
J24S Ssp Fittings Corp (USA)
4592488 ITEM 104 Naval Air Warfare Center Weapons Div (USA)
24TXSS Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
24TXSS Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
4592488 Naval Air Warfare Center Weapons Div (USA)
AA67033-24K Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA)
MS51533B24S Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-943-7175INTERCHANGEABLE
TEE,PIPE TO TUBE
4820-01-225-5795INTERCHANGEABLE
VALVE,CHECK
583-1 1/2D1
4710-01-230-6871INTERCHANGEABLE
TUBE ASSEMBLY,METAL
4693042-2
4730-01-541-5779INTERCHANGEABLE
SLEEVE,FLARED,TUBE FITTING
24TX-SS

Frequently Asked Questions

What is NSN 4730-01-126-7757?

NSN 4730-01-126-7757 is a Sleeve,flared,tube Fitting, 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 4730-01-126-7757?

NSN 4730-01-126-7757 has 8 cross-referenced part numbers: MIL-DTL-18866 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), J24S (Ssp Fittings Corp), 4592488 ITEM 104 (Naval Air Warfare Center Weapons Div), 24TXSS (Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division), 24TXSS (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division) and 3 more.

What NSN replaces 4730-01-126-7757?

There are 4 known substitutes for 4730-01-126-7757: 4730-00-943-7175, 4820-01-225-5795, 4710-01-230-6871 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-18866?

Key specifications for MIL-DTL-18866: Specification/standard Data: 96906-MS51533 GOVERNMENT STANDARD; Sleeve Outside Diameter: 1.510 INCHES NOMINAL IN; Flange Outside Diameter: 1.784 INCHES NOMINAL IN; Seat Angle in Deg: 37.0. 11 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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