S-95560A115 1/4"-20 x 1/2" Stainless Steel Oversized-Flange Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments like marine or chemical processing
• Enhanced durability and load distribution from the flanged design, eliminating the need for separate washers and speeding up assembly
• High tensile strength of 80,000 psi ensures reliable performance under heavy mechanical stress and vibration
• Easy installation and removal with the 5/32" hex drive and wide button head, providing secure tool engagement in tight spaces
• Precision threading with Class 2A UNC coarse threads delivers consistent fit and reduces cross-threading risks in industrial applications
• Full threading along the 1/2" length allows for adjustable fastening depth and strong grip across various material thicknesses
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for hazardous substances

Professional Applications & Engineering Value

This 316 stainless steel flanged rounded head screw is engineered to address common industrial challenges such as corrosion-induced failure and assembly inefficiency. The UNC coarse thread with Class 2A fit ensures quick installation and reliable holding power in metals, plastics, and composites, reducing downtime in production lines. Its flanged button head design distributes clamping force evenly, preventing surface damage and minimizing loosening under vibration—critical in machinery, automotive, and electrical enclosures. Combined with 80,000 psi tensile strength and Rockwell B85 hardness, it offers long-term reliability in demanding environments, from outdoor equipment to chemical processing plants, while the hex drive allows for high-torque applications without stripping.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy for consistent fit and performance. It is fully threaded, with a length of 1/2", flange diameter of 0.656", and right-hand threading. Manufactured from 316 stainless steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial fasteners.