S-90271A540 1/4"-20 x 3/4" ASME B18.6.3 Steel Truss Head Slotted Screws
Steel Truss 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 with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments.
- Maximum holding power from 60,000 PSI tensile strength and Rockwell B69 hardness, providing reliable performance under heavy loads.
- Easy installation and removal with a slotted drive design, compatible with standard tools for efficient assembly.
- Enhanced load distribution due to the wide truss head profile, reducing surface pressure and preventing material damage.
- Secure fastening in coarse materials with UNC coarse threading and Class 2A fit, offering excellent grip and vibration resistance.
- Full thread engagement along the 3/4" length, ensuring consistent clamping force across the entire fastener.
- Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these zinc-plated steel truss head screws address common challenges like corrosion, vibration loosening, and high-stress conditions. The wide rounded head design distributes clamping force evenly, minimizing the risk of surface damage in softer materials or thin sheets. With a 1/4"-20 UNC coarse thread and Class 2A fit, they provide superior grip in wood, plastic, and metal assemblies, resisting pull-out and maintaining integrity under dynamic loads. The slotted drive allows for quick installation with standard screwdrivers, making them ideal for maintenance, machinery, and electrical enclosures where reliability and compliance with ASME B18.6.3 standards are critical.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.25" and length of 3/4", ensuring dimensional accuracy per ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in various industrial sectors.
