S-91283A554 1 3/4"-5 x 6" ASME B18.2.1, ASTM A449 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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
- Superior load-bearing capacity with 90,000 psi tensile strength for reliable performance in demanding applications
- Enhanced durability and wear resistance thanks to Rockwell B90 hardness and Grade 5 steel construction
- Optimized thread engagement with Class 2A UNC coarse threading for faster assembly and reduced cross-threading risk
- Secure external hex drive provides excellent torque transmission and tool access in confined spaces
- Partial threading design offers both gripping strength and unthreaded shank stability for structural connections
- Comprehensive regulatory compliance including RoHS 3 and REACH for global industrial use
- Standardized dimensions per ASME B18.2.1 ensure interchangeability and replacement consistency
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver exceptional engineering value for heavy-duty industrial applications where vibration resistance and structural integrity are critical. The 1 3/4"-5 UNC coarse threading provides superior holding power in steel frameworks, machinery assembly, and construction projects, while the partially threaded design ensures precise clamping force distribution. Manufactured from high-strength steel with Rockwell B90 hardness, these fasteners withstand extreme mechanical stress and repetitive loading cycles. The external hex drive configuration allows for high-torque installation in confined spaces, making them ideal for maintenance, equipment manufacturing, and structural steel connections where reliability cannot be compromised.
Specification Summary & Compliance
This 6" length hex head screw features 1 3/4"-5 UNC coarse threading with Class 2A thread fit for standard industrial applications. The fastener meets ASME B18.2.1 dimensional specifications and ASTM A449 material standards, ensuring consistent performance and dimensional accuracy. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and unrestricted use in global markets. The combination of 90000 psi tensile strength and standardized threading provides reliable mechanical performance for critical bolting applications.
