S-94688A321 3/8"-16 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 load-bearing capability with 150,000 PSI tensile strength for secure, long-lasting connections in demanding environments
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial conditions
- Reliable high-strength performance guaranteed by SAE Grade 8 classification, ensuring consistent quality under extreme stress
- Easy installation and removal with external square drive design, allowing for high torque application without slippage
- Precise thread engagement with Unified Standard Class 3A fit and coarse UNC threading, reducing cross-threading risks
- Full-length threading for maximum grip and adjustment flexibility across the entire 2" length
- Industry-standard compliance with ASME B18.2.1 specifications, ensuring interchangeability and reliability
Professional Applications & Engineering Value
This high-strength square head screw delivers critical engineering value in heavy machinery, construction equipment, and industrial assembly where vibration resistance and structural integrity are paramount. The SAE Grade 8 steel construction combined with 150,000 PSI tensile strength prevents joint failure under dynamic loads, while the coarse UNC threading maintains holding power in materials prone to stripping. The zinc yellow-chromate plating provides essential corrosion protection in outdoor or chemically aggressive environments, significantly reducing maintenance frequency. The external square drive design enables secure tool engagement for high-torque applications where rounded fastener heads would compromise safety and efficiency.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with 3/8"-16 UNC coarse threading and Unified Standard Class 3A thread fit for optimal engagement. Fully compliant with ASME B18.2.1 specifications governing dimensional accuracy and mechanical properties. Features 2" length with full threading and 9/16" square head dimensions. The zinc yellow-chromate plating meets industry standards for corrosion protection while maintaining the fastener's high-strength characteristics.
