S-91783A535 1/4"-20 x 3/8" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• High tensile strength of 100,000 psi provides secure, vibration-resistant fastening for demanding industrial applications.
• Coarse UNC threading with Class 2A fit allows for quick, easy installation and superior grip in a wide range of materials.
• Fully threaded design maximizes engagement length and load distribution for enhanced joint integrity.
• Slotted drive and rounded head offer straightforward installation with standard tools while providing a smooth, finished appearance.
• Compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability with other standard components.
• Rockwell B100 hardness ensures durability and resistance to wear during repeated use or adjustments.

Professional Applications & Engineering Value

Engineered for industrial environments where corrosion resistance and mechanical reliability are critical, these 1/4-20 UNC slotted screws address common challenges like fastener failure due to environmental exposure or vibrational loosening. The 18-8 stainless steel material, combined with a passivated finish, significantly extends service life in applications exposed to moisture, chemicals, or outdoor conditions. The coarse thread design ensures rapid assembly and strong holding power in softer materials or where alignment tolerances are wider, making these screws ideal for machinery assembly, electrical enclosures, and structural frameworks. Their fully threaded configuration provides consistent clamping force along the entire length, reducing the risk of joint fatigue. By meeting ASME B18.6.3 specifications, these screws deliver predictable performance and compatibility, minimizing downtime and replacement costs in B2B procurement scenarios.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A tolerance for consistent fit and easy assembly. It is manufactured in compliance with ASME B18.6.3 standards, ensuring dimensional accuracy and performance reliability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free of hazardous substances and suitable for use in regulated industries.