S-91783A266 2-56 x 1 1/4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh or humid environments.
• Exceptional mechanical strength with a 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under high stress.
• Precise and reliable fastening ensured by the Class 2A thread fit and UNC coarse thread profile, reducing cross-threading risks.
• Broad compatibility and easy installation with a standard slotted drive and fully threaded 1-1/4" length for versatile use.
• Enhanced durability and longevity from the rounded head design, which minimizes stress concentration and potential snagging.
• Compliance with major industry standards including ASME B18.6.3, ensuring consistent quality and dimensional accuracy.
• Safe for regulated industries with full RoHS 3 and REACH compliance, meeting strict environmental and safety requirements.

Professional Applications & Engineering Value

This 2-56 UNC Rounded Head Slotted Screw is engineered to address common industrial challenges, such as component failure due to corrosion and vibration. Manufactured from 18-8 Stainless Steel with a passivated finish, it provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in electronics, marine hardware, and food processing equipment. The coarse thread spacing and Class 2A thread fit facilitate quick assembly and secure fastening, even in materials prone to stripping. Its fully threaded design and rounded head profile ensure uniform load distribution and reduce the risk of damage to surrounding components, offering reliable performance in precision assemblies and machinery where durability and regulatory compliance are critical.

Specification Summary & Compliance

This screw features a 2-56 UNC thread with Class 2A dimensional tolerance and coarse thread spacing for reliable engagement. It is manufactured in accordance with ASME B18.6.3 specifications, ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for hazardous substances.