S-91249A369 1/4"-20 x 3" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Superior tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Class 2A thread fit provides smooth assembly and consistent engagement with standard nuts
• Fully threaded UNC coarse spacing delivers maximum holding power and faster installation
• Rockwell B70 hardness maintains thread integrity and resists wear during repeated use
• No. 3 Phillips drive offers secure tool engagement and reduces cam-out risk
• Rounded pan head design provides a low-profile finish while distributing clamping force evenly

Professional Applications & Engineering Value

This 1/4-20 x 3" Black-Oxide Stainless Steel Rounded Head Phillips Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The 18-8 stainless steel with black-oxide coating significantly enhances durability in moist or chemically aggressive environments, reducing maintenance frequency. Its fully threaded UNC coarse spacing ensures rapid installation in metal framing, machinery, and equipment assembly, while the Class 2A thread fit guarantees compatibility with standard components. The pan head and Phillips drive design make it suitable for applications requiring a flush finish and reliable torque transfer, from automotive to construction sectors.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with Class 2A dimensional accuracy and coarse spacing. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring consistent quality and interchangeability. The product is also verified to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming its suitability for global industrial and commercial use without hazardous substances.