S-93015A216 1/4"-20 x 2" Thumb Screws

Key Features & Benefits at a Glance

• Superior hand-tightening grip with precision knurled texture on the 1" diameter head, enabling quick installation and removal without tools in tight spaces.
• Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in humid or chemically exposed industrial environments.
• High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness, providing reliable performance under heavy loads and repeated use.
• Easy alignment and engagement thanks to the extended tip design and coarse 1/4"-20 UNC threads, reducing cross-threading risks and speeding up assembly.
• Space-saving low-profile round head that minimizes protrusion while maintaining comfortable thumb pressure for frequent adjustments.
• Precision threading compliance with Class 2A fit for consistent engagement and reduced wear in high-vibration applications.
• Global regulatory compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries and international markets.

Professional Applications & Engineering Value

This 18-8 stainless steel thumb screw delivers critical engineering advantages in industrial settings where tool-less access and corrosion resistance are paramount. The knurled head provides a secure grip even with oily hands or gloves, solving slippage issues during rapid maintenance on machinery, electronic enclosures, and access panels. Its coarse UNC threading and partially threaded shank allow for faster installation in soft materials or pre-tapped holes, while the extended tip guides alignment to prevent damage to sensitive components. With 80,000 psi tensile strength, it withstands vibrational loosening in automotive, aerospace, and marine applications, offering a durable fastening solution that reduces downtime and replacement costs.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and 1/4"-20 UNC coarse threads ensuring interchangeability. The screw features a low-profile round head (1" diameter, 5/16" height) with knurled texture, partial threading up to 1 5/8", and an extended tip (0.125" length). Material certification includes 18-8 stainless steel with Rockwell B83 hardness. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions.