S-97705A139 2-56 x 1/8" QQ-P-35, MS51021-1 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, ensuring long-term reliability in harsh environments
- Exceptional holding power achieved through Class 3A thread fit precision, providing secure fastening in critical applications
- Easy installation and removal with 0.035" hex drive design, allowing efficient maintenance and adjustments
- Enhanced grip and minimal slippage thanks to the cup point tip that bites into mating surfaces
- Reliable performance in vibration-prone settings due to right-hand coarse (UNC) thread design
- Space-saving headless configuration ideal for compact assemblies where protruding components aren't feasible
- Compliance with major industry standards including Fed. Spec. QQ-P-35, RoHS 3, and REACH for quality assurance
Professional Applications & Engineering Value
This 2-56 UNC thread set screw delivers critical engineering value in precision assemblies where space constraints and corrosion resistance are paramount. Manufactured from 18-8 stainless steel, it effectively resists oxidation and chemical degradation in industrial environments, eliminating premature failure risks. The hex drive configuration ensures high torque transmission without cam-out, while the cup point tip creates permanent seating in shafts and collars, preventing rotational loosening under vibration. Particularly valuable in machinery, electronics, and automotive sub-assemblies, this headless set screw provides flush mounting where clearance is limited. The Class 3A thread fit maintains dimensional accuracy across production runs, ensuring consistent clamping force and reducing assembly rejects.
Specification Summary & Compliance
This set screw features precision 2-56 UNC coarse threads with Class 3A thread fit tolerances, manufactured to Fed. Spec. QQ-P-35 (MS51021-1) requirements. The fastener maintains dimensional accuracy with 0.086" thread diameter and 1/8" length. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restriction of hazardous substances in industrial applications.
