S-91264A621 3/8"-16 ASME B18.3, ASTM A574 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 locking with nylon pellet thread locker maintains secure connections in temperatures from -50° to 250°F, preventing loosening in dynamic applications
- Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength ensures reliable performance under heavy mechanical stress
- Precision Class 3A thread fit provides superior engagement and consistent clamping force in demanding assembly operations
- Durable alloy steel construction with Rockwell C32 hardness offers excellent wear resistance and long service life in industrial environments
- Corrosion-resistant black oxide finish protects against oxidation and extends component lifespan in various operating conditions
- Knurled socket head design enables secure tool grip and efficient installation with standard 1/4" hex drivers
- Precision shoulder diameter control with tight -0.004" to -0.002" tolerance ensures accurate alignment in bearing and pivot applications
Professional Applications & Engineering Value
This high-strength shoulder screw addresses critical engineering challenges in precision machinery and industrial equipment where vibration resistance and positional accuracy are paramount. The alloy steel construction with Rockwell C32 hardness provides exceptional durability against wear in rotating assemblies, while the nylon pellet thread locker eliminates the need for separate locking components in automated manufacturing systems. The precision Class 3A UNC threads ensure consistent clamping force in high-vibration environments, making it ideal for robotics, conveyor systems, and precision tooling applications. The black oxide finish further enhances corrosion resistance in demanding industrial settings, reducing maintenance frequency and downtime.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 3/8"-16 UNC coarse threads and maintains tight shoulder diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, the component is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial fastening applications.
