S-92186A571 1/4"-20 x 9" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for marine and chemical applications
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• External hex drive design provides secure, high-torque installation with standard tools for efficient assembly
• Coarse UNC threading (1/4"-20) offers faster installation and reduced cross-threading risk in industrial settings
• Class 2A thread fit guarantees consistent, precision mating with nuts and threaded components
• Partial threading configuration allows for optimal clamping force distribution across joint surfaces
• Rockwell B70 hardness maintains structural integrity and thread durability through repeated use

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 1/4"-20 UNC hex head screw in 316 stainless steel addresses critical challenges in corrosive environments. The coarse thread design prevents galling and seizing during installation, while the external hex drive enables high-torque fastening without stripping. With 9" length and partial threading, it provides superior clamping force in structural assemblies, machinery, and marine equipment where vibration resistance and long-term reliability are paramount. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures consistent performance in heavy-duty fastening applications, reducing maintenance frequency and downtime.

Specification Summary & Compliance

This hex head screw features precision Class 2A thread fit with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 specifications with Rockwell B70 hardness and 70,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.