Category: Technical Insights
Masofit 37° Flare Union (SAE J514): Technical Guide, Specifications & Applications
Published 30 August 2024 · 2 min read
The Masofit 37° Flare Union (SAE J514) is a precision hydraulic fitting engineered for demanding industrial applications — manufactured to SAE J514 and designed for long service life under high pressure and vibration. This article covers construction, material options, installation guidance, and industry applications.
Product Overview
37° Flare Union (SAE J514) from Masofit delivers a reliable 37° flare connection for hydraulic tube systems. Pressure capability reaches as per hose specification, making it suitable for construction & earthmoving, industrial machinery, oil & gas, agriculture, and automotive hydraulic circuits. Every fitting is marked MAS / MF with material grade and batch number for full batch traceability.
Construction & Materials
Available in carbon steel, stainless steel 304, stainless steel 316, and brass. Surface finish is Cr(VI)-free zinc plating as standard; zinc-nickel plating and SS passivation are available on request. The precision-machined body ensures consistent thread engagement and leak-free sealing from the first assembly.
Standards Compliance
- Manufacturing standard: SAE J514
- Connection type: 37° flare
- Product marking: MAS / MF with material grade and batch number
- Testing: 100% hydrostatic pressure tested before dispatch
Typical Applications
- Construction & earthmoving: Excavators, loaders, and mining equipment hydraulics
- Industrial machinery: CNC machine tools, presses, and injection moulding
- Oil & gas: Process hydraulics and instrumentation lines
- Agriculture: Tractor hydraulics and farm equipment
- Automotive manufacturing: Assembly line hydraulics and test rigs
Selection Guide
When specifying the 37° Flare Union (SAE J514), consider:
- Pressure series: Match LL (very light), L (light), or S (heavy) to your system working pressure
- Material: Choose carbon steel for standard industrial use; specify SS316 for corrosive or marine environments
- Tube O.D.: Verify exact outer diameter — metric and imperial sizes are not interchangeable
- Sealing: NBR O-rings are standard; FKM (Viton) is available for elevated temperature or chemical resistance
Installation Best Practices
- Inspect fitting and tube end for damage, burrs, or contamination before assembly
- Use the correct torque specification from Masofit torque and dimension specifications
- Do not mix thread standards — confirm BSPP, BSPT, NPT, or metric before installation
- For high-vibration environments, use support clamps within 150 mm of each fitting
- Re-check connections after first pressurisation and again at 50 operating hours
Ordering Information
Part numbers follow the Masofit MAS/MF coding system. Full dimensions, pressure ratings, and part-number structure are available on the product page. For custom materials, special finishes, or OEM quantities, contact Masofit sales.