S-92949A540 1/4"-20 x 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
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 and passivated finish, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable fastening under demanding mechanical loads
- Precise Class 3A thread fit provides excellent engagement and vibration resistance in critical assemblies
- Hex drive design with 5/32" drive size enables secure tool engagement and high torque application
- Rounded button head profile offers a low-profile, aesthetically pleasing finish while minimizing snagging risks
- Coarse UNC threading allows for quicker installation and better performance in softer materials
- Full threading along the 3/4" length ensures maximum grip and adjustability throughout the fastener
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw delivers exceptional performance in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of passivated finish and stainless steel material provides superior protection against chemical exposure and environmental factors, making it ideal for machinery, electrical enclosures, and outdoor equipment. The hex drive design ensures positive torque transmission without cam-out, while the Class 3A UNC thread fit maintains precise tolerances for vibration-resistant assemblies. With 70,000 psi tensile strength and Rockwell B55 hardness, this fastener withstands significant structural loads while the rounded button head creates a flush, professional appearance in finished products.
Specification Summary & Compliance
This 1/4"-20 x 3/4" screw features Class 3A thread fit with UNC coarse threading and full threading along the entire shank. Manufactured to ASME B18.3 specifications with compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both dimensional accuracy and regulatory adherence for global industrial applications.
