S-94735A721 4-40 x 3/8" Plastic Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Excellent corrosion resistance ensures long-term reliability in harsh chemical and humid environments without rust or degradation.
• Superior electrical insulation properties prevent short circuits, making it ideal for sensitive electronic assemblies.
• Wide operating temperature range from -40° to 185°F maintains structural integrity in both freezing and elevated heat conditions.
• Coarse UNC threads with Class 2A fit provide quick, secure installation and reliable holding power in plastic or soft materials.
• Phillips No. 1 drive and pan head design allows for easy, efficient driving with standard tools and a low-profile, rounded finish.
• Full threading along the 3/8" length offers maximum grip and adjustability for versatile mounting applications.
• RoHS 3 and REACH compliance guarantees safety for use in regulated industries, free from hazardous substances.

Professional Applications & Engineering Value

This 4-40 UNC nylon plastic screw is engineered to address common industrial challenges such as corrosion in chemical processing and electrical insulation in PCB and electronic enclosures. The nylon material provides inherent resistance to moisture, oils, and many solvents, eliminating the risk of galvanic corrosion when used with dissimilar metals. Its coarse thread design ensures strong engagement in plastic housings and soft substrates, reducing stripping and improving assembly speed. With a temperature range of -40° to 185°F, it performs reliably in outdoor, automotive, and HVAC applications where thermal stability is critical. The Phillips drive and pan head facilitate quick installation, while the fully threaded shank allows for precise clamping force distribution, making it a versatile plastic fastener for maintenance-free, durable assemblies.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for consistent, precise engagement. Dimensions include a 3/8" length, 0.215" head diameter, and pan head style with Phillips No. 1 drive. It is manufactured from nylon plastic and is fully threaded. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted substances for safe use in global markets.