S-99926A164 1/2"-13 x 1 1/4" 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 thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 psi ensures reliable, high-load performance in demanding applications
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant fastening
- Undercut flat head with 100° countersink angle allows for flush mounting and improved seating in countersunk holes
- 5/16" hex drive enables high-torque installation with standard tools, reducing assembly time
- UNC coarse threading offers faster installation and better performance in softer materials
- Full compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance
Professional Applications & Engineering Value
Engineered for industrial applications where corrosion resistance and high tensile strength are critical, these 18-8 stainless steel flat head screws deliver exceptional performance in machinery, structural assemblies, and outdoor equipment. The Class 3A thread fit and UNC coarse threading provide superior vibration resistance and faster installation in soft metals or plastics, while the undercut flat head profile ensures a flush finish that prevents snagging and improves aerodynamics. The passivated finish enhances surface durability against chemical exposure, making these partially threaded screws ideal for applications requiring both precise alignment and maximum holding power in corrosive environments.
Specification Summary & Compliance
This 1/2"-13 UNC flat head screw features precision Class 3A thread fit with coarse thread spacing, manufactured to exact dimensional standards including 0.5" thread diameter and 1-1/4" length. The screw meets Rockwell B70 hardness specifications and maintains 70,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
