S-91882A439 5/16"-18 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Superior hand-tightening grip with knurled round head texture for quick, tool-free adjustments in industrial settings
• Enhanced corrosion resistance through black-oxide steel coating, extending service life in demanding environments
• High tensile strength (70,000 psi) and Rockwell B84 hardness for reliable performance under mechanical stress
• Coarse UNC threading ensures faster assembly and reduced cross-threading risks in repetitive applications
• Full threading along 1" length provides maximum engagement depth and clamping force distribution
• Class 2A thread fit guarantees consistent interchangeability and smooth installation with standard nuts
• Regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

Engineered for industrial equipment, machinery panels, and frequent-access enclosures, this black-oxide steel thumb screw solves critical operational challenges. The knurled round head design delivers exceptional grip even with oily hands or gloves, reducing installation time and eliminating tool dependency. Its coarse 5/16"-18 UNC threads resist jamming in high-vibration environments while maintaining secure fastening. The fully threaded shank ensures uniform stress distribution, preventing localized wear in repeated adjustment applications. With 70,000 psi tensile strength, it withstands mechanical loads in production fixtures, electronic chassis, and maintenance hatches without deformation.

Specification Summary & Compliance

Manufactured to UNC coarse thread standards with Class 2A thread fit for precise dimensional accuracy. The black-oxide steel construction meets RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I and REACH (EC 1907/2006) standards. Right-hand thread direction and 1" fully threaded length ensure compatibility with standard industrial components.