S-93996A521 4-40 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Vibration-resistant performance with nylon patch thread locker that maintains integrity across -70° to 250°F temperature ranges
- Superior corrosion resistance through 18-8 stainless steel construction for extended service life in harsh environments
- Precision alignment capability with Class 2A thread fit and controlled shoulder diameter tolerances (-0.001" to 0")
- High-strength reliability delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Secure hex drive engagement with 5/64" socket head preventing cam-out during installation
- Simplified assembly through standardized UNC coarse threading and right-hand direction
- Regulatory compliance assurance meeting RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw with nylon patch locking technology addresses critical vibration-induced loosening in precision assemblies. The 18-8 stainless steel construction provides exceptional corrosion resistance for industrial environments while maintaining 70,000 psi tensile strength. The precisely machined 1/8" shoulder diameter with tight tolerances ensures accurate component alignment in machinery, automotive, and electronic applications. The socket head design with hex drive allows for high-torque installation in confined spaces, making it ideal for precision shoulder screw applications where reliability and dimensional accuracy are paramount. The integrated thread locker performs consistently across extreme temperature ranges from -70° to 250°F, eliminating the need for secondary locking compounds.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and shoulder diameter tolerance of -0.001" to 0". Features UNC coarse threading with 4-40 thread size and right-hand direction. The shoulder length maintains 1/4" dimension with 0" to 0.002" tolerance for precise fitment. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industries. The nylon patch thread locker provides consistent locking performance without compromising the 18-8 stainless steel material properties.
