S-94361A336 1/4"-28 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
- Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C32 hardness, ensuring reliable performance in high-stress industrial applications.
- Superior corrosion resistance provided by the black oxide finish, extending service life in harsh or humid operating environments.
- Precise thread engagement with Class 3A thread fit and 1/4"-28 UNF fine threads, offering secure fastening and vibration resistance in precision assemblies.
- Accurate shoulder dimensions with tight tolerances (shoulder diameter: -0.004" to -0.002", length: -0.005" to 0.005"), enabling exact alignment and smooth rotational movement.
- Easy installation and removal thanks to the knurled socket head with 5/32" hex drive, allowing for secure tool grip and efficient maintenance.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries and global markets.
- Versatile application fit with standard shoulder profile and right-hand thread direction, suitable for a wide range of machinery and equipment.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining exact alignment and withstanding repetitive motion. The Class 3A thread fit and UNF fine threads provide superior resistance to loosening under vibration, making it ideal for rotating machinery, automation systems, and tooling jigs. The black oxide finish enhances corrosion resistance, prolonging component life in demanding environments like manufacturing plants or outdoor equipment. With a knurled socket head and precise shoulder tolerances, it ensures easy installation and reliable performance in applications requiring strict dimensional control, such as bearings, pulleys, and linkages.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit for high precision, with UNF fine threads (1/4"-28) and shoulder diameter tolerance of -0.004" to -0.002". It meets RoHS 3 (2015/863/EU) compliance with exemption 6(a) for lead in steel and is REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence.
