S-91249A550 1/4"-20 x 1 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 PSI tensile strength and Rockwell B70 hardness for reliable load-bearing applications
• Optimized fastening efficiency with fully threaded UNC coarse thread design ensuring quick installation and secure holding power
• Precise thread compatibility through Class 2A fit, providing consistent engagement and reducing cross-threading risks
• Enhanced drive stability with Phillips No. 3 drive and standard pan head profile for secure tool engagement and reduced cam-out
• Broad regulatory compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for global industrial use
• Versatile rounded head design offering low-profile installation with 0.492" head diameter for flush mounting in various applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these black-oxide 18-8 stainless steel screws combine material durability with precision manufacturing to address critical fastening challenges. The pan head design with Phillips drive provides superior torque transmission while preventing surface damage during installation. With 1/4"-20 UNC coarse threads and Class 2A fit, these fully threaded screws ensure rapid assembly and vibration resistance in machinery, electrical enclosures, and structural frameworks. The black-oxide coating enhances corrosion protection beyond standard stainless steel, making them ideal for outdoor equipment, marine applications, and chemical processing facilities where environmental resistance is paramount. Their 70,000 PSI tensile strength guarantees structural integrity under dynamic loads, while the standardized dimensions ensure compatibility with existing industrial components and tooling systems.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with UNC coarse threads maintaining Class 2A dimensional tolerances for precise fit. The 1/4"-20 thread size with 1-1/2" length provides standardized fastening solutions. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance. Material certification confirms 18-8 stainless steel composition with Rockwell B70 hardness and 70,000 PSI tensile strength verification.