S-90843A160 4-40 x 3/4" Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum
Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum
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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 corrosion resistance with silver-plated 18-8 stainless steel construction, ideal for harsh industrial environments
- Superior thread engagement achieved through Class 3A fit, ensuring precise assembly and vibration resistance
- High tensile strength of 70,000 psi provides reliable performance under significant mechanical loads
- Excellent hardness (Rockwell B70) maintains fastener integrity and prevents stripping during installation
- High vacuum compatibility makes these screws suitable for critical applications in aerospace and scientific equipment
- Secure hex drive installation with 3/32" drive size prevents cam-out and ensures proper torque application
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
These silver-plated 18-8 stainless steel socket head cap screws deliver exceptional performance in demanding applications where precision and reliability are paramount. The 4-40 UNC coarse thread design combined with Class 3A thread fit ensures superior vibration resistance and consistent clamping force in machinery, aerospace components, and electronic enclosures. The high vacuum rating makes them ideal for vacuum chambers and scientific instrumentation, while the silver plating enhances conductivity and provides additional corrosion protection beyond the inherent resistance of 18-8 stainless steel. Engineered for industrial socket head applications, these fasteners solve critical challenges in assembly precision, environmental durability, and long-term performance maintenance.
Specification Summary & Compliance
These socket head cap screws feature precise Class 3A thread fit per UNC standards with 4-40 thread size and 3/4" length. Manufacturing specifications include 70,000 psi tensile strength and Rockwell B70 hardness. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial applications requiring high-performance fastening solutions.
