S-91268A130 1/4"-20 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex 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 load-bearing capacity with 150,000 PSI tensile strength for reliable performance in demanding applications
- Superior durability and wear resistance thanks to Grade 8 steel construction and Rockwell C33 hardness
- Secure fastening with precise thread engagement through Class 2A thread fit and 1/4"-20 UNC coarse threading
- Easy installation and removal with standard external hex drive and 7/16" head width
- Optimized for vibration resistance with partially threaded design preventing loosening under stress
- Full regulatory compliance meeting ASME B18.2.1, SAE J429 standards and environmental regulations
- Versatile 1" length providing flexibility for various industrial assembly requirements
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in heavy-duty industrial applications where failure is not an option. The 150,000 PSI tensile strength and Rockwell C33 hardness ensure reliable performance in high-stress environments including machinery assembly, structural steel connections, and automotive components. The 1/4"-20 UNC coarse threading provides superior grip in various materials while the partially threaded design concentrates strength where needed most. The external hex drive allows for high-torque installation, making these steel fasteners ideal for applications requiring both precision and brute force. Engineered to withstand extreme conditions while maintaining Class 2A thread fit accuracy, these screws prevent costly downtime and maintenance in critical industrial operations.
Specification Summary & Compliance
This inch system fastener features precise Class 2A thread fit with 1/4"-20 UNC coarse threading and meets ASME B18.2.1 and SAE J429 manufacturing specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. With a standardized 1" length and 3/4" minimum thread length, this fastener maintains consistent dimensional accuracy for reliable performance in professional applications.
