S-90324A020 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional tensile strength rated at 70,000 psi for reliable performance under heavy loads
- Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical applications
- Knurled socket head design provides enhanced grip and prevents tool slippage during installation
- Left-hand thread configuration offers specialized solutions for reverse-thread applications and safety mechanisms
- 1/2" precision shoulder length maintains accurate component spacing and alignment in assemblies
- Environmental compliance with RoHS 3 and REACH regulations for global manufacturing acceptance
Professional Applications & Engineering Value
This 4-40 UNC left hand thread shoulder screw delivers critical engineering solutions where reverse-thread functionality meets precision spacing requirements. The 18-8 stainless steel composition provides excellent corrosion resistance, making it suitable for chemical processing, marine applications, and food processing equipment where moisture resistance is paramount. The knurled socket head with 5/64" hex drive ensures maximum torque transmission without cam-out, while the Class 3A thread fit maintains tight tolerances in high-vibration environments. The precision 1/2" shoulder length acts as a reliable axle or pivot point in machinery, electrical components, and precision instruments, preventing lateral movement and ensuring proper alignment of rotating parts.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and UNC coarse thread specifications. The shoulder features precise dimensional tolerances with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Mechanical properties include Rockwell B55 hardness and minimum shear strength of 35,000 psi. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global industrial applications.
