S-95894A111 4-40 x 1/4" Thread-Locking Stainless Steel Button Head Torx Screws
Thread-Locking Stainless Steel Button Head Torx 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
- Permanent vibration resistance through epoxy thread locker that hardens in just 4 hours and reaches full strength in 72 hours
- Exceptional temperature tolerance from -65°F to 400°F for reliable performance in extreme industrial environments
- Superior corrosion resistance with 18-8 stainless steel construction and Rockwell B55 hardness for long-term durability
- Enhanced torque transmission with T8 Torx drive that reduces cam-out and provides secure installation
- Precise thread engagement with Class 3A thread fit and UNC coarse threading for consistent fastening performance
- Secure rounded button head design that provides a low-profile finish while preventing snagging in tight spaces
- High tensile strength of 70,000 psi ensures reliable performance under heavy load conditions
Professional Applications & Engineering Value
These 4-40 UNC T8 Torx rounded head screws with permanent epoxy thread locker provide critical solutions for industrial applications where vibration-induced loosening compromises safety and performance. The 18-8 stainless steel construction offers excellent corrosion resistance while maintaining 70,000 psi tensile strength, making them ideal for machinery, electronic enclosures, and automotive components exposed to harsh environments. The Class 3A thread fit ensures precise engagement with mating components, while the T8 Torx drive prevents stripping during high-torque installation. The epoxy adhesive begins hardening within 4 hours and reaches full strength in 72 hours, creating a permanent bond that withstands temperature fluctuations from -65°F to 400°F, eliminating the need for maintenance or retightening in critical assemblies.
Specification Summary & Compliance
This 1/4" length screw features 4-40 UNC coarse threading with Class 3A thread fit precision and fully threaded design. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength. The permanent epoxy thread locker provides reliable locking performance across the specified temperature range. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
