S-90417A133 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior thread retention in plastics with the Tri-Lobe shank design that creates durable, vibration-resistant threads without pre-tapping.
• Enhanced corrosion resistance thanks to the Black-Oxide Steel finish, providing reliable performance in various industrial environments.
• Optimized for high-volume assembly featuring a Phillips No. 2 drive for efficient installation with common tools, reducing operator fatigue.
• Precision thread forming action with a 0.164" diameter and 16 threads per inch, minimizing stress cracking in plastic components.
• Secure fastening with a standard pan head that offers a low-profile, rounded design for a flush finish and excellent clamp load distribution.
• Full-length threading ensures maximum grip along the entire 1/2" length, providing consistent holding power in plastic assemblies.
• Compliance with global environmental standards including RoHS 3 and REACH, making them suitable for regulated industries and export products.

Professional Applications & Engineering Value

This No. 8 TRS tapping screw is engineered specifically for plastic fastening applications, where traditional screws can cause material failure. The thread forming (Type TRS) design with its Tri-Lobe shank cross-section displaces plastic material to create strong, clean internal threads without generating chips. This eliminates the need for separate tapping operations and reduces assembly time. The Black-Oxide Steel construction provides a protective layer against oxidation, extending the fastener's life in enclosures, automotive trim, and consumer electronics. The combination of a blunt tip and precise 16 TPI thread ensures easy starting and reduces the risk of boss cracking, making it an ideal high-performance fastener for demanding production environments.

Specification Summary & Compliance

This screw conforms to standard inch dimensions: a No. 8 screw size with a 1/2" length and a thread diameter of 0.164". It features a fully threaded right-hand design with 16 threads per inch and is designed for use with a No. 23 drill bit (0.154" diameter). The product is manufactured to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.