S-92210A540 1/4"-20 x 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 for extended service life in harsh environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
- Precision thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
- Efficient installation with hex drive design providing superior torque transmission and reduced cam-out risk
- Optimal flush mounting with standard 82° countersink angle for seamless surface integration
- Full thread coverage along the entire 3/4" length for maximum grip and load distribution
- Regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These 18-8 stainless steel flat head screws with UNC coarse threading and passivated finish deliver critical performance advantages for industrial applications. The combination of 70,000 psi tensile strength and Class 3A thread fit ensures reliable fastening in high-vibration environments while preventing loosening. The hex drive design allows for high-torque installation without stripping, making them ideal for machinery assembly, equipment manufacturing, and structural applications where flush mounting is required. The corrosion-resistant properties of the stainless steel material with passivated surface treatment provide long-term durability in challenging conditions, reducing maintenance frequency and replacement costs.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNC coarse thread (1/4"-20) for precision dimensional accuracy. Features include 0.25" thread diameter, 3/4" length with full threading, and standard 82° countersink angle. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
