S-90337A488 5/16"-18 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 wear resistance with TiCN coating, extending service life in high-friction applications
- Excellent corrosion protection from 18-8 stainless steel construction, ideal for harsh environments
- Precise component alignment through controlled shoulder diameter and length tolerances
- Reliable thread engagement with Class 2A fit ensuring consistent assembly performance
- High strength-to-weight ratio delivering 70,000 psi tensile strength for demanding applications
- Space-saving low-profile design with socket head for confined installation spaces
- Regulatory compliance meeting RoHS and REACH standards for global manufacturing requirements
Professional Applications & Engineering Value
This precision shoulder screw solves critical alignment challenges in industrial machinery, automation systems, and precision instruments. The 18-8 stainless steel core provides inherent corrosion resistance while the TiCN coating significantly enhances surface hardness to Rockwell B55, reducing galling and wear in high-cycle applications. The controlled shoulder dimensions (-0.001" to 0" diameter tolerance, 0" to 0.002" length tolerance) ensure exact component positioning, eliminating play in rotating assemblies. The 5/16"-18 UNC coarse thread with Class 2A fit maintains reliable engagement while the low-profile socket head allows installation in space-constrained designs. These features combine to deliver consistent performance in precision manufacturing equipment, robotic arms, and medical devices where alignment accuracy and durability are paramount.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter control (3/8" ±0.001") and shoulder length (3/8" +0.002"/-0"). Manufactured from 18-8 stainless steel with TiCN coating, it delivers 70,000 psi tensile strength and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility in industrial applications.
