S-93310A716 1/2"-13 x 1 1/2" ASME B18.3, ASTM F879, MIL-DTL-18240 Thread-Locking Stainless Steel Button Head Hex-Drive Screws
Thread-Locking 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
- Vibration-resistant locking with permanent nylon patch ensures reliable fastening in high-motion environments, preventing loosening under stress
- Exceptional corrosion resistance from 18-8 stainless steel construction maintains integrity in harsh or humid industrial settings
- High tensile strength of 70,000 PSI provides robust load-bearing capacity for demanding mechanical applications
- Wide temperature tolerance (-70° to 250°F) allows consistent performance across extreme thermal conditions
- Precision Class 3A UNC coarse threads deliver superior fit and faster installation in coarse-thread applications
- Hex drive design with 5/16" drive size enables high-torque application and secure tool engagement
- Fully threaded shank maximizes grip length and distributes clamping force evenly across the entire fastener
Professional Applications & Engineering Value
Engineered for high-vibration environments where fastener integrity is critical, these 18-8 stainless steel rounded head screws solve common industrial challenges through their integrated nylon patch locking technology. The button head profile provides a low-profile installation while the coarse UNC threads ensure rapid assembly in machinery, structural frameworks, and equipment subjected to constant motion or thermal cycling. With Rockwell B55 hardness and 70,000 PSI tensile strength, they maintain clamp load under dynamic stresses where standard fasteners would fail. The combination of corrosion-resistant material and permanent thread locker makes them ideal for automotive, manufacturing, and outdoor equipment applications requiring durable, maintenance-free fastening solutions.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (1/2"-13) and full compliance with ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications. These rounded head screws meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications while maintaining consistent dimensional accuracy and performance reliability.
