S-91251A491 8-36 x 1/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 PSI provides superior load-bearing capacity and resistance to failure in demanding applications.
- Precision Class 3A thread fit ensures tighter tolerances and reliable, secure fastening with minimal risk of loosening.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance for improved durability in various industrial environments.
- Fine UNF thread design allows for finer adjustments and a more secure hold in materials where coarse threads are unsuitable.
- High hardness (Rockwell C37) increases wear resistance, extending the screw's service life under repetitive stress.
- Fully threaded design provides consistent clamping force along the entire length for uniform load distribution.
- Standard hex socket drive enables high-torque installation with common tools, reducing assembly time and effort.
Professional Applications & Engineering Value
This 8-36 UNF socket head cap screw is engineered for high-stress applications where precision and reliability are non-negotiable. The black-oxide alloy steel construction, combined with a Class 3A thread fit, addresses common industrial challenges like vibrational loosening and material fatigue. Its fine thread profile is ideal for securing components in thinner materials or applications requiring precise tension control, such as in machinery, automotive assemblies, and precision equipment. The fully threaded rod ensures maximum engagement, providing a robust solution for assemblies that demand uniform clamping force and superior tensile strength up to 170,000 PSI, making it a dependable choice for critical engineering projects.
Specification Summary & Compliance
This fastener adheres to Class 3A thread tolerances for precision fit and is manufactured in accordance with ASTM A574 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The UNF fine thread standard and right-hand thread direction are maintained for consistent performance in industrial applications.
