S-91783A083 2-56 x 5/8" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• High mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under stress
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring consistent fastening and vibration resistance
• Full threading design providing maximum grip length and uniform load distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use in regulated industries
• Easy installation and removal featuring a standard slotted drive and rounded head profile for straightforward manual operation

Professional Applications & Engineering Value

These 2-56 UNC rounded head slotted screws deliver exceptional engineering value in precision assembly applications where corrosion resistance and mechanical reliability are critical. The 18-8 stainless steel material combined with passivated finish provides superior protection against oxidation and chemical exposure, making them ideal for electronics, instrumentation, marine components, and food processing equipment. The fully threaded design ensures maximum thread engagement in thin materials, while the Class 2A thread fit maintains consistent clamping force without galling or seizing. The rounded head profile with slotted drive offers a low-profile solution for applications where clearance is limited, while the coarse thread spacing enables quick installation and superior resistance to vibration loosening in dynamic environments.

Specification Summary & Compliance

This precision fastener features Class 2A thread fit with UNC coarse threads (2-56 size) and right-hand threading direction, ensuring dimensional accuracy per ASME B18.6.3 manufacturing standards. The screw maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated industries and international markets. With a length of 5/8" and complete threading throughout, this fastener delivers consistent performance meeting industrial specifications for precision mechanical assemblies.