S-91264A804 5/8"-11 ASME B18.3, ASTM A574 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 load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength for reliable performance in demanding applications
- Vibration-resistant locking through integrated nylon pellet thread locker that maintains secure fastening from -50° to 250°F
- Precision alignment and smooth rotation with Class 3A thread fit and 2-1/2" shoulder length for accurate component positioning
- Enhanced corrosion resistance with black oxide finish protecting against rust in industrial environments
- Easy installation and removal with 3/8" hex drive socket head and knurled texture for improved grip during tool operation
- Durable alloy steel construction with Rockwell C32 hardness ensuring long service life under repetitive stress
- Industry-standard compatibility meeting ASME B18.3 specifications for reliable interchangeability
Professional Applications & Engineering Value
This alloy steel shoulder screw with 5/8"-11 UNC coarse threads and black oxide finish delivers exceptional engineering value in precision assembly applications. The 2-1/2" shoulder length provides precise alignment for rotating components in machinery, while the Class 3A thread fit ensures consistent engagement in high-vibration environments. The integrated nylon pellet thread locker prevents loosening under dynamic loads, making these socket head shoulder screws ideal for industrial equipment, automation systems, and heavy machinery where vibration resistance and positioning accuracy are critical. The combination of high tensile strength and corrosion-resistant finish addresses common failure points in demanding applications.
Specification Summary & Compliance
This shoulder screw features Class 3A thread fit with UNC coarse threads (5/8"-11) and precise shoulder diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications with material compliance to ASTM A574. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial use.
