S-90434A188 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior plastic retention with TRS thread forming design that creates strong, permanent threads without chipping or cracking plastic materials
• Exceptional vibration resistance through Tri-Lobe shank cross-section that provides superior holding power in dynamic applications
• Corrosion-resistant protection with Black Oxide Steel finish that extends service life in various industrial environments
• Efficient installation with Phillips No. 1 drive and standard 82° countersink angle for flush mounting and reduced installation time
• Optimized thread engagement featuring fully threaded 20 TPI design for maximum pull-out strength in plastic assemblies
• Precise fitment with No. 37 drill bit compatibility (0.104" diameter) ensuring proper hole preparation and secure fastening
• Regulatory compliance meeting RoHS 3 and REACH standards for use in regulated industrial applications

Professional Applications & Engineering Value

These No. 4 TRS thread forming screws are specifically engineered to address common challenges in plastic fastening applications where traditional fasteners often cause material stress or failure. The thread forming technology displaces plastic material rather than cutting it, creating zero clearance threads that significantly reduce the risk of plastic cracking or stress fractures. The Tri-Lobe shank design provides three-point contact that resists loosening under vibration, making these Black Oxide Steel screws ideal for automotive components, electronic enclosures, and industrial equipment where reliability is critical. The combination of 20 TPI thread pitch and fully threaded construction ensures maximum engagement depth while the 82° countersink angle allows for flush mounting in plastic assemblies requiring aesthetic finishes.

Specification Summary & Compliance

These thread forming screws feature precision manufacturing with a 0.112" thread diameter and 5/16" length for consistent performance. The TRS tapping screw type follows industry-standard thread forming specifications with right-hand threading direction. Manufacturing compliance includes RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant certifications, ensuring environmental responsibility and material safety for industrial applications worldwide.