S-90299A538 1/4"-20 x 5/8" ASME B18.3, ASTM A574 Brass-Tip Alloy Steel Socket Head Screws
Brass-Tip Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 180,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Non-marring brass tip protects sensitive surfaces from scratches and damage during installation, maintaining product aesthetics.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies.
- Black-oxide finish on alloy steel enhances corrosion resistance and durability in demanding industrial environments.
- Rockwell C39 hardness offers excellent wear resistance, extending the screw's service life under repetitive loads.
- Fully threaded UNC coarse design allows for faster installation and stronger holding power in various materials.
- Hex socket drive enables easy access and high torque application in confined spaces, improving assembly efficiency.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in precision machinery, automotive, and heavy equipment assembly. The Class 3A UNC coarse thread ensures minimal backlash and secure fastening in high-vibration settings, while the non-marring brass tip prevents damage to finished surfaces—ideal for applications requiring both structural integrity and aesthetic preservation. With a tensile strength of 180,000 psi and Rockwell C39 hardness, it withstands extreme operational stresses, reducing maintenance needs and downtime. The fully threaded design and hex drive facilitate quick, reliable installations in tight spaces, making it a versatile solution for engineers seeking durability and efficiency in industrial fasteners.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy under the UNC coarse thread standard. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
