S-91783A743 4-48 x 1/2" ASME B18.6.3 Stainless Steel Round Head Slotted Screws
Stainless Steel Round Head Slotted 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 and passivated finish for extended service life in harsh environments
- Precise thread engagement with Class 2A fit and UNF fine threads ensuring secure, vibration-resistant fastening
- Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for high-stress applications
- Optimized drive performance featuring a standard slotted drive and rounded head for straightforward installation and removal
- Full thread coverage across the entire 1/2" length providing maximum grip and load distribution
- Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
These 4-48 UNF fine thread screws with rounded head slotted design deliver critical performance advantages in precision assembly applications. The combination of 18-8 stainless steel material and passivated surface treatment provides exceptional resistance to corrosion and chemical exposure, making them ideal for electronics, instrumentation, and medical equipment where reliability is paramount. The fine thread configuration offers superior holding power in thin materials and delicate components, while the Class 2A thread fit ensures consistent engagement without binding. The fully threaded design maximizes connection integrity across the entire fastener length, preventing loosening under vibration and thermal cycling conditions common in industrial environments.
Specification Summary & Compliance
This rounded head slotted screw features precise Class 2A thread fit with 4-48 UNF fine threads and right-hand threading direction. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy, including 0.211" head diameter and 1/2" length. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring compliance for international industrial applications requiring restricted substance control.
