S-97832A290 1/4"-20 ASME B18.3 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 corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
- Precise alignment and rotational control due to the 2 1/2" shoulder with tight diameter tolerance, minimizing component misalignment.
- High load-bearing capability with 70,000 psi tensile strength and 35,000 psi shear strength, suitable for demanding mechanical applications.
- Secure and efficient installation using the hex drive and knurled head, providing enhanced grip and torque transmission.
- Consistent thread engagement with Class 3A UNC coarse threads, offering reliable fastening and vibration resistance.
- Compliance with industry standards including ASME B18.3, ensuring interchangeability and quality in precision assemblies.
- Environmental and safety adherence through RoHS 3 and REACH compliance, making it suitable for regulated global markets.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 2 1/2" shoulder provides a stable pivot or spacer, essential for machinery requiring precise rotational control, such as in conveyor systems, robotic arms, and assembly jigs. The Class 3A UNC thread and coarse spacing ensure quick assembly and resistance to loosening under vibration, while the knurled head and hex drive facilitate easy installation in confined spaces. Made from corrosion-resistant stainless steel, it withstands exposure to moisture and chemicals, reducing maintenance needs. Ideal for positioning and alignment tasks, this screw enhances operational efficiency and longevity in automotive, aerospace, and manufacturing applications.
Specification Summary & Compliance
The screw features a 1/4"-20 UNC Class 3A thread with a length of 3/4" and a shoulder diameter tolerance of -0.004" to -0.002" for high precision. It conforms to ASME B18.3 specifications, ensuring dimensional accuracy and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety standards for industrial use.
