S-99468A188 1/4"-20 x 1/2" ASME B18.6.3 Aluminum Slotted Flat Head Screws

Key Features & Benefits at a Glance

• High-strength aluminum construction provides excellent durability while maintaining lightweight properties ideal for weight-sensitive applications
• Precise Class 2A thread fit ensures smooth installation and reliable fastening performance in industrial assemblies
• 82° countersink angle design allows for flush mounting with standard countersunk holes, creating clean, professional finishes
• Full threading along the entire 1/2" length offers maximum grip and holding power throughout the fastener engagement
• 50,000 psi tensile strength with Rockwell B55 hardness delivers exceptional mechanical performance for demanding applications
• Comprehensive compliance with ASME B18.6.3 standards guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH environmental compliance ensures safe use across various industries without hazardous substance concerns

Professional Applications & Engineering Value

These 1/4-20 UNC flat head slotted screws engineered from 2024 aluminum provide an optimal solution for applications requiring high strength-to-weight ratio and corrosion resistance. The coarse thread spacing and Class 2A thread fit ensure rapid installation and secure fastening in materials where fine threads might strip or fail. The standard flat head profile with 82° countersink angle creates seamless, flush surfaces in machinery, aerospace components, and electronic enclosures. The slotted drive style offers compatibility with standard tools while the right-hand thread direction provides familiar installation for maintenance personnel. These fully threaded screws maintain consistent holding power across their entire length, making them ideal for vibration-resistant assemblies in industrial equipment and transportation applications.

Specification Summary & Compliance

This flat head screw features precise 1/4"-20 UNC coarse threads with Class 2A thread fit tolerance per ASME standards. Manufacturing and dimensional compliance adhere to ASME B18.6.3 specifications, ensuring consistent performance and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for restricted hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. Mechanical properties include Rockwell B55 hardness and 50,000 psi tensile strength, providing reliable performance in various industrial fastening applications.