PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51506B6Elbow,pipe to Tube

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-070-8537 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-070-8537 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-070-8537. Primary manufacturer part number: MS51506B6.
Features
  • Elbow,pipe to Tube — FSC 4730
  • Thread Class: 2A FIRST END A
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Nominal Thread Size: 0.250 INCHES SECOND END IN
  • Connection Style: PLAIN (PIPE) SECOND END
  • Thread Series Designator: UNF FIRST END
  • Connection Style: FLARED (TUBE) FIRST END
  • Connection Type: THREADED INTERNAL PIPE SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Overall construction
General Description

The Elbow,pipe to Tube, cataloged under National Stock Number 4730-01-070-8537, 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 Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN4730-01-070-8537
Primary Part NumberMS51506B6
Item NameElbow,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread Class2A FIRST END A
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Nominal Thread Size0.250 INCHES SECOND END IN
Connection StylePLAIN (PIPE) SECOND END
Thread Series DesignatorUNF FIRST END
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Maximum Operating Temp121.0 CELSIUS SINGLE RESPONSE DEGC
Thread Series DesignatorNPTF SECOND END
Surface TreatmentCADMIUM OVERALL
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Outside Diameter Tube Accommodated0.375 INCHES FIRST END IN
MaterialSTEEL OVERALL
Flow Angle90.0 DEGREES
Media for Which DesignedHYDRAULIC FLUID SINGLE RESPONSE
Leg Length0.880 INCHES NOMINAL SECOND END IN
Surface Treatment Document and ClassificationQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Nominal Thread Size0.562 INCHES FIRST END IN
Seat Angle37.0 DEGREES FIRST END
Leg Length1.230 INCHES NOMINAL FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-289-2378 INTERCHANGEABLE
Elbow,pipe to Tube
Cross-Reference Index
Part NumberManufacturer
MS51506B6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-289-2378INTERCHANGEABLE
ELBOW,PIPE TO TUBE

Frequently Asked Questions

What is NSN 4730-01-070-8537?

NSN 4730-01-070-8537 is a Elbow,pipe to Tube, manufactured by Military Standards Promulgated by Military Departments 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 4730-01-070-8537?

NSN 4730-01-070-8537 has 1 cross-referenced part number: MS51506B6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-070-8537?

There is 1 known substitute for 4730-01-070-8537: 4730-00-289-2378. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51506B6?

Key specifications for MS51506B6: Thread Class: 2A FIRST END A; Connection Type: THREADED EXTERNAL TUBE FIRST END; Nominal Thread Size: 0.250 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) SECOND END. 20 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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