S-90291A880 1/2"-20 ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Vibration-resistant nylon tip prevents loosening under dynamic loads, maintaining secure positioning in high-stress applications
- Class 3A precision threads ensure superior fit and consistent clamping force for reliable performance in critical assemblies
- 18-8 stainless steel construction provides excellent corrosion resistance and durability in demanding environments
- Temperature-stable nylon 6/6 tip maintains integrity across extreme thermal conditions (-50° to 250°F)
- 1/4" hex drive design enables high-torque installation without head protrusion for space-constrained applications
- Fine UNF thread profile delivers enhanced holding power and resistance to vibrational loosening
- Rockwell B80 hardness ensures optimal balance of strength and machinability for long service life
Professional Applications & Engineering Value
This nylon tip set screw addresses critical engineering challenges in industrial applications where vibration resistance and surface protection are paramount. The 18-8 stainless steel body provides exceptional corrosion resistance while the UNF fine thread with Class 3A tolerance ensures precise engagement and consistent clamping force. The non-marring nylon 6/6 tip protects sensitive shaft surfaces while effectively dampening vibrations in machinery, automotive, and precision equipment applications. The headless hex drive configuration allows for flush mounting in space-limited assemblies, making it ideal for adjustable components, collars, and knobs where reliable positioning is essential without damaging the contact surface.
Specification Summary & Compliance
This 1/2"-20 UNF set screw features Class 3A thread fit precision with a 5/8" length and 1/4" hex drive. Manufactured to ASME B18.3 specifications, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The right-hand thread direction and fine thread spacing ensure optimal performance in industrial fastening applications requiring high vibration resistance and precise torque control.
