S-94701A612 4-40 x 3/8" ASME B18.6.3 Plastic Pan Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional temperature performance maintains integrity from -350°F to 500°F for reliable operation in extreme environments
• Superior chemical resistance thanks to PTFE plastic construction, ideal for corrosive applications
• Precision Class 2A thread fit ensures consistent engagement and secure fastening in assemblies
• Easy installation and removal with standard slotted drive design for straightforward maintenance
• Rounded pan head profile provides smooth surface finish while preventing snagging in sensitive applications
• Full threading along 3/8" length delivers maximum grip strength and uniform load distribution
• Regulatory compliance assurance meets ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These PTFE plastic rounded head screws deliver critical performance advantages in demanding industrial environments where metal fasteners would fail. The 4-40 UNC coarse thread configuration with Class 2A fit provides reliable engagement in plastic components and soft materials while resisting vibration loosening. The white PTFE material offers exceptional chemical inertness, making these slotted screws ideal for chemical processing equipment, food manufacturing machinery, and laboratory instruments where contamination must be avoided. The extreme temperature resistance (-350° to 500°F) ensures dimensional stability in thermal cycling applications, while the rounded pan head design eliminates sharp edges that could damage sensitive components or wiring. These fully threaded plastic fasteners solve critical challenges in electrical insulation, corrosion-prone environments, and applications requiring non-magnetic, non-conductive properties.

Specification Summary & Compliance

This 4-40 UNC plastic screw features precision Class 2A thread fit with coarse thread spacing and right-hand thread direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance standards. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. The rounded pan head maintains standard profile dimensions with 0.219" head diameter and 0.068" head height, while the 3/8" length provides optimal fastening depth for various assembly requirements.