S-91746A437 5/16"-18 x 1" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior grip and easy manual operation with knurled round head design requiring no tools for installation
- Excellent corrosion resistance and durability from 18-8 stainless steel construction suitable for harsh environments
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
- Low-profile head design providing clearance in tight spaces while maintaining ample turning surface
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe industrial use
- Optimized thread configuration with partial threading for precise positioning and reduced assembly time
Professional Applications & Engineering Value
This 5/16"-18 UNC thumb screw delivers exceptional value in industrial settings where frequent adjustments and reliable fastening are critical. The 18-8 stainless steel construction provides superior corrosion resistance, making it ideal for manufacturing equipment, electronic enclosures, and machinery subjected to moisture or chemicals. The knurled round head offers exceptional grip even with gloved hands, significantly reducing installation time while the low-profile design minimizes protrusion in compact assemblies. With coarse UNC threads and Class 2A thread fit, this partially threaded screw ensures quick engagement and consistent clamping force, solving common issues of cross-threading and inconsistent torque in high-volume production environments.
Specification Summary & Compliance
This thumb screw features precision 5/16"-18 UNC right-hand threads with Class 2A thread fit for reliable mechanical fastening. The partially threaded design extends 15/16" on a 1" long body with 3/4" knurled head diameter. Manufactured from 18-8 stainless steel with 80,000 psi tensile strength and Rockwell B83 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications.
