S-90298A749 1/2"-13 ASME B18.3 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 and passivated finish, ideal for harsh industrial environments.
- Precise alignment and reduced wear thanks to the 5/8" shoulder with tight diameter tolerance of -0.001" to 0.001".
- High-strength, reliable fastening achieved through Class 3A UNC threads and Rockwell B55 hardness for demanding applications.
- Easy installation and removal with a 5/16" hex socket drive and knurled head for improved grip.
- Durable construction ensures long service life under heavy loads and repetitive use.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality and safety assurance.
- Versatile right-hand coarse threading provides secure, quick assembly in various machinery and equipment.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The passivated finish enhances corrosion resistance, making it suitable for applications in moist or chemically aggressive settings, such as industrial machinery, automotive systems, and conveyor equipment. The 5/8" shoulder diameter with minimal tolerance ensures exact positioning of components, reducing misalignment and wear. Combined with Class 3A UNC threads and a hex socket drive, it offers reliable, high-strength fastening that withstands vibration and heavy loads, improving overall equipment longevity and reducing maintenance needs in B2B environments.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise engagement, a shoulder diameter of 5/8" with tolerance from -0.001" to 0.001", and a shoulder length of 1 1/4" with tolerance from -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and quality in industrial use.
