S-93996A118 4-40 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
- Vibration-resistant locking: Nylon patch thread locker ensures secure fastening in high-vibration environments, maintaining integrity from -70° to 250° F.
- Exceptional strength and durability: 70,000 psi tensile strength and Rockwell B55 hardness provide reliable performance under heavy loads and repetitive use.
- Precise shoulder fit: Tight diameter tolerance of -0.001" to 0" and controlled shoulder length enable accurate alignment in assemblies.
- Corrosion resistance: 18-8 stainless steel construction offers excellent resistance to rust and corrosion in harsh industrial conditions.
- Easy installation and removal: Socket head design with slotted drive allows for efficient tool engagement and straightforward maintenance.
- Standardized threading: 4-40 UNC coarse threads with Class 2A fit ensure compatibility and smooth assembly in various applications.
- Regulatory compliance: Meets RoHS 3 and REACH standards, supporting safe and sustainable manufacturing practices.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. Made from 18-8 stainless steel, it resists corrosion in demanding environments like machinery, automotive systems, and electronic enclosures. The nylon patch locking feature prevents loosening under vibration, reducing maintenance needs and downtime. With a 1/8" shoulder diameter and precise tolerances, it ensures accurate positioning of parts like gears and pulleys, enhancing operational reliability. Ideal for industrial applications requiring temperature stability from -70° to 250° F, this screw delivers consistent performance where strength and precision are critical.
Specification Summary & Compliance
The screw features a Class 2A thread fit per UNC standards, with a shoulder diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002" for precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Manufactured to high-quality standards, it supports reliable use in technical and engineering contexts.
