S-97705A242 4-40 x 3/8" QQ-P-35, MS51021-13 Set Screws
Set 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 corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
- Maximum holding power achieved through cup point tip design that bites into mating surfaces
- Precise thread engagement with Class 3A thread fit ensuring tight, secure fastening
- Easy installation and removal with hex drive design requiring minimal clearance space
- Space-saving headless design ideal for applications where protruding fasteners aren't feasible
- Right-hand coarse UNC threads providing quick assembly and disassembly in industrial settings
- Environmental compliance meeting RoHS 3 and REACH standards for safe usage
Professional Applications & Engineering Value
This 4-40 UNC set screw delivers exceptional engineering value in precision assembly applications where space constraints and corrosion resistance are critical concerns. The 18-8 stainless steel construction provides excellent resistance to oxidation and chemical exposure, making it ideal for machinery, electronic enclosures, and automotive components exposed to moisture or harsh operating conditions. The cup point tip creates positive locking action by embedding into the mating surface, preventing rotational slippage in high-vibration environments. The hex drive headless design allows for installation in confined spaces where traditional headed fasteners cannot be used, while the Class 3A thread fit ensures precise engagement with mating components for reliable, repeatable performance in manufacturing and maintenance operations.
Specification Summary & Compliance
This precision set screw features a 4-40 UNC coarse thread with Class 3A thread fit for superior dimensional accuracy and tight tolerances. The fastener complies with Fed. Spec. QQ-P-35 (MS51021-13) manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. The right-hand thread direction and 0.050" hex drive size provide standardized installation compatibility across industrial applications.
