S-90585A580 5/16"-18 x 5/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- Exceptional tensile strength of 70,000 psi ensures reliable performance in high-stress applications
- Precision Class 3A thread fit provides secure, vibration-resistant fastening with minimal play
- Enhanced durability from Rockwell B55 hardness and passivated surface treatment
- Easy installation with standard 82° countersink angle and hex drive for flush mounting
- Full threading along the 5/8" length offers maximum grip and adjustment flexibility
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 316 stainless steel flat head screws deliver critical performance in demanding sectors like chemical processing, marine equipment, and food manufacturing where corrosion resistance is paramount. The passivated finish enhances the natural chemical resistance of 316 grade stainless steel, preventing galvanic corrosion and extending service life in acidic or saline conditions. With a Class 3A thread fit and UNC coarse threading, these screws provide superior vibration resistance and faster installation compared to fine-thread alternatives. The hex drive and standard 82° countersink ensure flush mounting in precision-machined components, making them ideal for assemblies requiring smooth surface profiles and reliable industrial fastening under continuous stress.
Specification Summary & Compliance
This 5/16"-18 UNC flat head screw maintains precise dimensional tolerances with Class 3A thread fit and head diameter tolerance of -0.056" to 0". Manufactured in compliance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements. The screw features fully threaded coarse spacing, 82° countersink angle, and is supplied with a passivated finish for enhanced corrosion protection.
