S-92790A668 7/8"-9 x 4 1/2" ASTM A193 Super-Corrosion-Resistant 316 Stainless Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction for reliable performance in harsh environments and chemical exposure
• High tensile strength rating of 75,000 psi ensures maximum load-bearing capacity and structural integrity in heavy-duty applications
• Precision thread fit with Class 2A tolerance enables smooth installation and secure fastening without cross-threading issues
• Optimized load distribution through partially threaded design with 2" thread length and 2½" grip length for superior joint stability
• Enhanced durability with Rockwell B96 hardness rating provides excellent resistance to wear and deformation under stress
• Industry-standard compliance with ASTM A193 Grade B8M specifications guarantees consistent quality and performance in critical applications
• Easy installation and removal with external hex drive and coarse UNC threads for efficient maintenance and assembly operations

Professional Applications & Engineering Value

This 7/8"-9 UNC hex head screw delivers critical engineering solutions where corrosion resistance and structural integrity are paramount. The 316 Stainless Steel composition provides superior performance in chemical processing, marine environments, and high-humidity applications where standard fasteners would deteriorate. The partially threaded design ensures optimal clamping force distribution across the 2½" grip length while maintaining precise alignment. With coarse UNC threading and Class 2A thread fit, installation becomes significantly more efficient in field applications, reducing assembly time while preventing galling and seizing. The external hex drive accommodates standard wrenching tools for straightforward maintenance in confined spaces, making this fastener ideal for pressure vessels, structural connections, and industrial equipment requiring reliable, long-term performance under demanding conditions.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit tolerance with 7/8"-9 UNC coarse threads and complies with ASTM A193 Grade B8M specifications. The fastener maintains dimensional accuracy with 2" thread length, 4½" overall length, and meets the material and mechanical property requirements for high-temperature and corrosion-resistant applications. Manufacturing follows standardized inch system measurements ensuring compatibility with existing industrial equipment and replacement part specifications.