S-91746A439 5/16"-18 x 1 1/2" 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 corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced manual grip from the knurled thumb head design, allowing for tool-free tightening without slippage
- Space-saving low-profile head provides clearance in confined assembly areas while maintaining easy access
- High tensile strength of 80,000 psi ensures reliable, durable fastening under mechanical stress
- Precise Class 2A thread fit guarantees smooth engagement and consistent performance in UNC threaded applications
- Partially threaded shank concentrates thread engagement where needed, preventing over-tightening and material damage
- Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
Professional Applications & Engineering Value
This low profile knurled thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-less operation. Manufactured from 18-8 Stainless Steel, it resists oxidation and chemical exposure in manufacturing, electronics, and outdoor equipment. The coarse UNC 5/16"-18 threading and Class 2A fit enable quick installation with minimal cross-threading risk. Its partially threaded design prevents jamming in deep tapped holes, while the knurled head texture ensures positive grip even with oily hands or gloves. Engineers specify this thumb screw for access panels, jigs, and machinery where corrosion-resistant, high-strength fastening and rapid disassembly are critical.
Specification Summary & Compliance
This thumb screw features a 5/16"-18 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. The 1 1/2" length includes a 1 7/16" threaded portion with right-hand direction. Material properties include Rockwell B83 hardness and 80,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting strict industry standards for hazardous substance restrictions.
