S-91283A552 1 3/4"-5 x 5" ASME B18.2.1, ASTM A449 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex 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 load-bearing capacity with 90000 PSI tensile strength for demanding industrial applications
- Superior durability and wear resistance thanks to Rockwell B90 hardness and Grade 5 steel construction
- Reliable coarse threading (UNC) provides excellent grip and vibration resistance in heavy machinery
- Precision Class 2A thread fit ensures smooth assembly and consistent performance
- Large hex head design (2 5/8" width) enables high-torque installation with standard tools
- Partial threading configuration offers optimal clamping force distribution
- Full regulatory compliance with RoHS 3, REACH, and ASME B18.2.1 standards for worry-free procurement
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical performance in heavy industrial environments where fastener failure is not an option. The 1 3/4"-5 UNC coarse thread design provides superior resistance to vibration loosening in construction equipment, structural steel connections, and heavy machinery assemblies. Manufactured from ASTM A449 steel with Rockwell B90 hardness, these fasteners maintain integrity under extreme stress conditions. The partially threaded configuration concentrates clamping force precisely where needed, while the external hex drive accommodates high-torque applications. These industrial fasteners solve critical challenges in structural bolting, machinery maintenance, and heavy equipment manufacturing where reliability and compliance are paramount.
Specification Summary & Compliance
This Grade 5 hex head screw features precision Class 2A thread fit with 1 3/4"-5 UNC coarse threading and minimum thread length of 4 1/2". Manufactured to ASME B18.2.1 specifications using ASTM A449 steel, these fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable procurement for industrial applications.
