S-95955A304 1/4"-20 x 1/2" Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws
Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
- Secure left-hand threading prevents loosening in counter-rotating applications, enhancing operational safety
- Easy installation and removal with 5/32" hex drive compatibility, reducing assembly time and tool requirements
- Precision thread engagement with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance
- Low-profile rounded button head provides a finished appearance while minimizing snagging hazards
- Full regulatory compliance with RoHS 3 and REACH standards for environmentally responsible sourcing
Professional Applications & Engineering Value
These left hand thread rounded head screws deliver critical engineering solutions where standard right-hand fasteners would compromise system integrity. The 18-8 stainless steel composition provides excellent corrosion resistance in manufacturing equipment, marine components, and food processing machinery where moisture exposure is constant. The UNC coarse threading and Class 2A thread fit maintain secure connections in high-vibration environments like conveyor systems and rotating machinery. The combination of hex drive compatibility and fully threaded design enables rapid installation in confined spaces while the left-hand direction specifically addresses applications involving counter-clockwise rotating components, preventing accidental disassembly and reducing maintenance frequency across industrial operations.
Specification Summary & Compliance
Manufactured to precise dimensional standards including 1/4"-20 UNC thread size with Class 2A thread fit tolerance, 0.437" head diameter, and 1/2" length. These screws feature fully threaded coarse spacing and meet all specified mechanical properties including 80,000 psi tensile strength. Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance adherence for global industrial applications.
