S-97715A264 1/4"-20 x 5/8" ASME B18.3 Brass Button Head Hex-Drive Screws
Brass 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 brass construction ideal for harsh environments and electrical applications
- Precise, reliable fastening ensured by Class 3A thread fit for minimal backlash and vibration resistance
- High tensile strength of 50,000 psi provides dependable load-bearing capacity for demanding industrial use
- Enhanced durability from Rockwell B55 hardness, offering excellent wear resistance and long service life
- Easy installation and removal with 5/32" hex drive, preventing cam-out and reducing assembly time
- Versatile coarse UNC threading ensures quick engagement and is less prone to clogging in dirty conditions
- Full compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
Professional Applications & Engineering Value
This 1/4-20 UNC brass rounded head screw delivers exceptional performance in critical industrial applications where corrosion resistance and electrical conductivity are paramount. The Class 3A thread fit provides superior precision, eliminating play in assemblies subject to vibration—common in machinery, automotive, and marine equipment. Its coarse threading enables rapid installation in soft materials or environments where fine debris is present, reducing assembly time and maintenance costs. The combination of 50,000 psi tensile strength and Rockwell B55 hardness ensures the screw maintains integrity under dynamic loads, while the rounded button head offers a low-profile finish that minimizes snagging. Fully compliant with ASME B18.3, it meets rigorous engineering specifications for reliable, repeatable performance in OEM and MRO scenarios.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision and right-hand threading. It is fully threaded with a length of 5/8", head diameter of 0.437", and drive size of 5/32" hex. Manufactured to meet ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
