S-91746A923 4-48 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with knurled round head for superior grip without tools
• Corrosion-resistant performance in demanding environments thanks to 18-8 stainless steel construction
• High strength and durability with 80,000 psi tensile strength and Rockwell B83 hardness
• Precise thread engagement with Class 2A fine UNF threads ensuring reliable fastening
• Full thread coverage along the 3/4" length for maximum adjustability and holding power
• Compliance with environmental standards including RoHS 3 and REACH for safe industrial use
• Narrow profile design for applications with limited clearance while maintaining easy handling

Professional Applications & Engineering Value

This 4-48 UNF thumb screw delivers exceptional value in precision assembly applications where manual adjustments and frequent access are required. The 18-8 stainless steel material provides excellent corrosion resistance, making it ideal for electronics, instrumentation, and medical equipment exposed to moisture or chemicals. The fully threaded design with fine thread spacing ensures secure positioning in delicate components, while the knurled head offers reliable hand-tightening without slipping. Engineers benefit from the narrow profile round head that fits confined spaces while maintaining the Class 2A thread fit for consistent performance in repetitive maintenance cycles.

Specification Summary & Compliance

This thumb screw features 4-48 UNF fine threads with Class 2A fit for precision tolerance, manufactured from 18-8 stainless steel with 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) regulations, ensuring environmental safety in industrial applications.