S-95092A316 4-40 x 1/4" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Flat and Split Lock Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh industrial environments.
• Reliable vibration resistance thanks to the integrated split lock washer, preventing loosening under dynamic loads.
• High tensile strength of 70,000 psi ensures dependable performance in demanding mechanical assemblies.
• Easy installation and removal with Phillips #1 drive and standard pan head design for common tool compatibility.
• Precise thread engagement with UNC coarse threads and Class 2A fit, facilitating quick assembly and reducing cross-threading risks.
• Durable washer assembly made from matching 18-8 Stainless Steel, maintaining consistent corrosion protection and mechanical integrity.
• Full threading along the 1/4" length provides maximum grip and adjustability in various material thicknesses.

Professional Applications & Engineering Value

Engineered for reliability, this 4-40 UNC pan head screw with lock washer addresses critical challenges in industrial fastening. The 18-8 Stainless Steel construction, enhanced by a passivated finish, offers excellent resistance to oxidation and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The integrated split lock washer effectively counters vibration-induced loosening, a common failure point in dynamic systems. With a coarse thread profile and Class 2A thread fit, it ensures rapid installation and secure holding in metals and plastics, reducing assembly time and improving production efficiency. Its fully threaded design and Phillips #1 drive provide versatility and ease of use across automated and manual assembly lines, supporting consistent performance in high-volume manufacturing.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy. It complies with ASME B18.13 specifications, ensuring consistent manufacturing quality. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for global industrial use.