S-92981A911 M4 ASTM A108 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 durability with 140,000 psi tensile strength and Rockwell C32 hardness for reliable performance in demanding applications.
- Superior corrosion resistance thanks to the black oxide finish, extending service life in harsh industrial environments.
- Precise alignment and secure positioning with a 35mm shoulder length and standard shoulder fit, minimizing assembly errors.
- Easy installation and removal using a standard 2.5 mm hex drive and knurled head for improved grip and torque application.
- Consistent thread engagement with Class 5g6g thread fit and M4 x 0.7mm coarse pitch, ensuring reliable fastening in various materials.
- Broad compliance and safety meeting ASTM A108 standards, RoHS 3, and REACH regulations for global use and environmental responsibility.
- Versatile metric design with right-hand threads and alloy steel construction, ideal for precision machinery and equipment assemblies.
Professional Applications & Engineering Value
This M4 shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in high-stress assemblies. Made from alloy steel with a black oxide finish, it provides excellent resistance to corrosion and abrasion, making it suitable for automotive, aerospace, and machinery applications. The 35mm shoulder length and precise Class 5g6g thread fit ensure accurate positioning and reduced vibration, while the socket head with hex drive allows for easy access in confined spaces. Ideal for securing rotating parts and guiding components, this screw enhances assembly reliability and longevity in precision engineering projects.
Specification Summary & Compliance
This shoulder screw features a Class 5g6g thread fit with M4 x 0.7mm coarse pitch and a shoulder diameter tolerance of -0.072 to -0.01 mm for high dimensional accuracy. It complies with ASTM A108 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence.
