S-91794A128 5-40 x 1/2" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws
Stainless Steel Fillister Head Slotted Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity under stress
- Class 2A thread fit provides consistent, smooth assembly with standard UNC coarse threads for faster installation
- Fully threaded design offers maximum grip and holding power along the entire 1/2" length
- High, narrow fillister head profile allows for deeper tool engagement and reduced risk of cam-out in tight spaces
- Rockwell B55 hardness maintains thread form and head integrity during repeated use and torquing
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for industrial procurement
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 5-40 UNC fillister head slotted screws address common challenges like corrosion, vibration loosening, and assembly efficiency. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to rust and chemicals, making them suitable for electronics enclosures, machinery panels, and automotive components. The high, narrow rounded head design ensures secure driver engagement with standard slotted tools, reducing slippage and damage during installation. With coarse UNC threads and a Class 2A fit, these screws enable quick, precise fastening in metals and plastics, minimizing production downtime while meeting rigorous ASME B18.6.3 specifications for consistent performance.
Specification Summary & Compliance
This screw features a 5-40 UNC coarse thread with Class 2A tolerance for reliable interchangeability, a 1/2" length, and full threading. It is manufactured in compliance with ASME B18.6.3 for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations without hazardous substances.
