S-90969A250 1/4"-20 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
- Exceptional alignment precision with Class 3A thread fit for reduced assembly play and improved component positioning
- Superior load-bearing capacity from 140,000 psi tensile strength alloy steel construction for demanding applications
- Enhanced corrosion resistance through black oxide finish that provides durable protection in industrial environments
- Optimized space utilization with ultra-low socket head profile and 5/32" hex drive for confined spaces
- Secure grip and handling thanks to knurled head texture that prevents slipping during installation
- Reliable coarse threading with 1/4"-20 UNC configuration for faster assembly and reduced cross-threading risks
- Precision shoulder dimensions maintaining tight tolerances for consistent pivot and bearing functions
Professional Applications & Engineering Value
These alloy steel shoulder screws deliver critical engineering solutions where precise alignment and rotational movement are paramount. The Class 3A thread fit ensures minimal backlash in assemblies, while the 7/16" shoulder length provides accurate spacing between components in machinery, automation systems, and precision instruments. The black oxide finish offers corrosion protection without significant dimensional change, making these socket head shoulder screws ideal for pivots, axles, and locating pins in manufacturing equipment. The ultra-low profile head with 5/32" hex drive accommodates space-constrained designs while the knurled texture enhances grip during installation. With 140,000 psi tensile strength and Rockwell C30 hardness, these fasteners maintain integrity under substantial mechanical stress in industrial environments.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse threading (1/4"-20). Shoulder diameter maintains -0.004" to -0.002" tolerance while shoulder length holds ±0.005" precision. These shoulder screws comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet current industrial compliance requirements for hazardous substance restrictions.
