S-92360A318 1/4"-20 x 5/8" ASME B18.3, ASTM F835, MIL-DTL-18240 Thread-Locking Steel Button Head Hex-Drive Screws
Thread-Locking 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
- Permanent vibration resistance with Nylon Patch thread locker that maintains integrity across a wide -70° to 250° F temperature range
- Exceptional durability and corrosion resistance from Black-Oxide Alloy Steel construction with Rockwell C39 hardness
- Superior load-bearing capacity thanks to 120,000 psi tensile strength for demanding industrial applications
- Reliable, precise fastening with Class 3A thread fit and UNC coarse threading for maximum holding power
- Easy installation and removal using standard 5/32" hex drive tooling
- Full-thread engagement for consistent clamping force along the entire 5/8" length
- Compliant with major industry standards including ASME B18.3, ASTM F835, and MIL-DTL-18240
Professional Applications & Engineering Value
These Black-Oxide Alloy Steel rounded head screws deliver critical vibration resistance in demanding mechanical assemblies where loosening under dynamic loads is a primary concern. The permanent Nylon Patch thread locker provides reliable locking without requiring additional compounds, maintaining secure fastening across extreme temperature fluctuations from -70° to 250° F. The combination of 120,000 psi tensile strength and Rockwell C39 hardness ensures these fully threaded UNC coarse pattern screws withstand high-stress applications in machinery, automotive, and heavy equipment. The rounded button head profile with hex drive offers both aesthetic appeal and practical installation advantages, while the Class 3A thread fit guarantees precise engagement for maximum clamping force in critical joints.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (1/4"-20) and full threading along the 5/8" length. Complies with ASME B18.3, ASTM F835, and MIL-DTL-18240 specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements.
