S-90357A140 1/4"-20 x 7/8" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile Socket 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 140,000 psi provides superior reliability in high-stress applications, reducing the risk of fastener failure.
- Precision Class 3A thread fit ensures consistent, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
- Black-oxide finish on alloy steel offers excellent corrosion resistance, extending service life in harsh industrial environments.
- Ultra-low socket head profile allows for installation in confined spaces where standard head heights are prohibitive.
- Fully threaded design maximizes grip and load distribution along the entire length, improving joint integrity.
- Rockwell C32 hardness provides durable wear resistance, maintaining thread integrity through repeated use.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance for global industrial supply chains.
Professional Applications & Engineering Value
These 1/4-20 UNC socket head cap screws are engineered to address critical challenges in precision machinery, automotive assemblies, and heavy-duty equipment. The black-oxide alloy steel construction combats rust and wear, while the ultra-low profile head and coarse thread spacing facilitate quick, secure installations in tight spaces. With a Class 3A thread fit, these fasteners deliver consistent clamping force and vibration resistance, preventing loosening in dynamic applications. Ideal for use in robotics, aerospace, and manufacturing fixtures, they provide reliable performance where high tensile strength and dimensional accuracy are non-negotiable.
Specification Summary & Compliance
This product adheres to UNC coarse thread standards with a precise Class 3A thread fit and length tolerance of -0.005" to 0.005". Manufactured from alloy steel with a black-oxide surface treatment, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring suitability for regulated industrial and export markets.
