S-91253A052 1-72 x 3/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy 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 black-oxide coating, extending service life in demanding industrial environments
- Exceptional tensile strength (130,000 psi) ensures reliable performance under high-stress assembly conditions
- Precision Class 3A thread fit provides tighter tolerances for secure, vibration-resistant fastening in critical applications
- Hex drive design (0.050") enables high-torque installation without cam-out, reducing tool wear and assembly time
- 82° countersink angle with standard flat head profile allows for flush mounting in precision-machined components
- Fully threaded construction maximizes grip length and load distribution across the entire fastener
- Rockwell C39 hardness rating maintains thread integrity and prevents stripping during repeated installations
Professional Applications & Engineering Value
These 1-72 UNF fine thread screws with black-oxide alloy steel construction address critical challenges in precision assembly applications. The Class 3A thread fit ensures minimal backlash in sensitive equipment where vibration resistance is paramount, while the flat head design with 82° countersink provides seamless integration in aerospace components, electronic enclosures, and medical devices. The hex drive configuration prevents slippage during high-torque installations, reducing rework rates in automated production lines. Combined with 130,000 psi tensile strength, these fully threaded fasteners deliver reliable performance in applications requiring consistent clamping force and dimensional stability across thermal cycles.
Specification Summary & Compliance
Manufactured to Class 3A thread tolerances with UNF fine threads (1-72) and right-hand threading. Compliant with ASTM F835 manufacturing specifications, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety regulations. All dimensional characteristics including 0.168" head diameter and 3/16" length maintain consistent precision for industrial fastener applications.
