S-8077A863 1/4"-28 ASME B18.3 Shoulder Screws
Shoulder 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 316 Stainless Steel construction and Black Oxide finish for extended service life in harsh environments
- Precision alignment capabilities with 1/2" shoulder length providing accurate component positioning and reduced wear
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Exceptional thread reliability through Class 3A thread fit ensuring secure fastening and vibration resistance
- Easy installation and removal with 5/32" hex socket drive and knurled head texture for superior grip
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for global market acceptance
Professional Applications & Engineering Value
This 1/4"-28 UNF shoulder screw delivers exceptional engineering value in precision applications where alignment accuracy and corrosion resistance are critical. The 316 Stainless Steel construction combined with Black Oxide finish provides superior protection against chemical exposure and atmospheric corrosion, making it ideal for marine, chemical processing, and food industry applications. The Class 3A thread fit ensures tight tolerances for vibration-resistant assemblies, while the standard shoulder diameter and precise length tolerances enable exact component positioning in machinery, automation systems, and precision instruments. The socket head design with hex drive facilitates installation in confined spaces, reducing assembly time and improving maintenance efficiency in industrial settings.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 1/4"-28 UNF fine threads and maintains tight dimensional tolerances including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, the component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring global compliance and environmental responsibility in industrial applications.
