PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN826-4STee,pipe to Tube

Aeronautical Standards Group Dept of Navy and Air Force · NSN 4730-00-277-5039 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-277-5039 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-277-5039. Primary manufacturer part number: AN826-4S.
Features
  • Tee,pipe to Tube — FSC 4730
  • Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Nominal Thread Size: 0.125 INCHES SECOND END IN
  • Connection Style: PLAIN (PIPE) SECOND END
  • Thread Series Designator: ANPT SECOND END
  • Leg Length: 0.759 INCHES MINIMUM AND 0.797 INCHES MAXIMUM SECOND END IN
  • Connection Type: THREADED EXTERNAL TUBE THIRD END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 347 Overall construction
General Description

The Tee,pipe to Tube, cataloged under National Stock Number 4730-00-277-5039, 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 Aeronautical Standards Group Dept of Navy and Air Force. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-277-5039
Primary Part NumberAN826-4S
Item NameTee,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAeronautical Standards Group Dept of Navy and Air Force
StatusCANCELLED
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Nominal Thread Size0.125 INCHES SECOND END IN
Connection StylePLAIN (PIPE) SECOND END
Thread Series DesignatorANPT SECOND END
Leg Length0.759 INCHES MINIMUM AND 0.797 INCHES MAXIMUM SECOND END IN
Connection TypeTHREADED EXTERNAL TUBE THIRD END
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
Leg Length0.859 INCHES MINIMUM AND 0.906 INCHES MAXIMUM THIRD END IN
Thread Class3A FIRST END A
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Thread Class3A THIRD END A
Seat Angle37.0 DEGREES FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Nominal Thread Size0.438 INCHES THIRD END IN
Leg Length0.859 INCHES MINIMUM AND 0.906 INCHES MAXIMUM FIRST END IN
Connection StyleFLARED (TUBE) THIRD END
Nominal Thread Size0.438 INCHES FIRST END IN
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Seat Angle37.0 DEGREES THIRD END
Surface Treatment Document and ClassificationQQ-P-35,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MaterialSTEEL COMP 347 OVERALL
Surface TreatmentPASSIVATE OVERALL
Nominal Outside Diameter Tube Accommodated0.250 INCHES THIRD END IN
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) THIRD END
Specification/standard Data96906-MS20826 GOVERNMENT STANDARD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
4730-00-720-1982AS5198J161616 INTERCHANGEABLE
Tee,pipe to Tube
Sae International Dba Sae International
4730-00-988-7787AS5198J040204 INTERCHANGEABLE
Tee,pipe to Tube
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
AN826-4S Aeronautical Standards Group Dept of Navy and Air Force (USA)
MILF5509 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS20826 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
CE826-4SS Collins Engineering Corp (USA)
Related Parts
4730-00-720-1982INTERCHANGEABLE
TEE,PIPE TO TUBE
AS5198J161616
4730-00-988-7787INTERCHANGEABLE
TEE,PIPE TO TUBE
AS5198J040204

Frequently Asked Questions

What is NSN 4730-00-277-5039?

NSN 4730-00-277-5039 is a Tee,pipe to Tube, manufactured by Aeronautical Standards Group Dept of Navy and Air Force, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-277-5039?

NSN 4730-00-277-5039 has 4 cross-referenced part numbers: AN826-4S (Aeronautical Standards Group Dept of Navy and Air Force), MILF5509 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS20826 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), CE826-4SS (Collins Engineering Corp).

What NSN replaces 4730-00-277-5039?

There are 2 known substitutes for 4730-00-277-5039: 4730-00-720-1982, 4730-00-988-7787. Verify interchangeability with system specifications before substitution.

What are the specifications of AN826-4S?

Key specifications for AN826-4S: Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Nominal Thread Size: 0.125 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) SECOND END. 27 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-277-5039 still in active supply?

NSN 4730-00-277-5039 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com