S-90276A534 1/4"-20 x 5/16" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round 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
- Enhanced corrosion resistance with zinc-plated steel construction, ensuring longevity in demanding environments.
- Reliable fastening performance due to UNC coarse threading and Class 2A fit, providing secure connections with minimal risk of cross-threading.
- Optimized for manual installation with a slotted rounded head design, allowing easy driving using standard screwdrivers.
- Consistent strength and durability from Rockwell B69 hardness, resisting deformation under typical industrial loads.
- Full thread engagement across the entire 5/16" length, maximizing grip and load distribution in assemblies.
- Broad compatibility with inch-based systems and coarse thread applications, reducing inventory complexity.
- Compliance with industry standards including ASME B18.6.3, ensuring quality and interchangeability.
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws are engineered to address common industrial challenges such as corrosion-induced failure and installation inefficiency. The zinc plating provides a protective barrier against moisture and chemicals, extending service life in applications like machinery assembly, electrical enclosures, and outdoor equipment. The UNC coarse thread and Class 2A fit ensure quick, reliable fastening with reduced risk of stripping, while the slotted drive offers simplicity for maintenance and field repairs. Ideal for industrial fastening solutions requiring consistent performance, these screws help minimize downtime and maintenance costs in right-hand thread systems.
Specification Summary & Compliance
This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse threading (1/4"-20), ensuring compatibility and ease of assembly. Manufactured in compliance with ASME B18.6.3 for mechanical and dimensional consistency, it also meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming the absence of restricted hazardous substances. The fully threaded design and specified hardness (Rockwell B69) support reliable performance in regulated industrial settings.
