S-94688A327 1/2"-13 x 2" ASME B18.2.1 Square Head Screws
Square Head 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
- Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh or outdoor environments.
- Coarse UNC threading allows for faster installation and better performance in materials prone to vibration or debris.
- Precise Class 3A thread fit ensures tight, secure connections with minimal risk of loosening under dynamic loads.
- External square drive design offers high torque capability and easy installation with standard tools, reducing assembly time.
- Full threading along the 2" length provides maximum grip and adjustability in a variety of material thicknesses.
- Compliance with ASME B18.2.1 specifications guarantees consistent quality and interchangeability in professional applications.
Professional Applications & Engineering Value
This SAE Grade 8 square head screw is engineered for demanding environments where high tensile strength and durability are critical. The steel construction and zinc yellow-chromate plating provide excellent resistance to corrosion, making it ideal for construction, heavy machinery, and automotive assemblies exposed to moisture or chemicals. The UNC coarse thread and Class 3A fit ensure secure fastening in soft materials or applications subject to vibration, reducing maintenance needs. With its external square drive, it supports high-torque installation without stripping, streamlining assembly in industrial settings where reliability and efficiency are paramount.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It is manufactured from high-strength steel with a zinc yellow-chromate finish and meets ASME B18.2.1 standards, ensuring consistent performance and interchangeability. The product is fully threaded and designed for right-hand application, supporting compliance with common industrial specifications for heavy-duty fastening.
