S-91099A425 12-24 x 1" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength rated at 80,000 psi ensures reliable performance under high-stress applications
- Precise flush mounting with undercut flat head design and 82° countersink angle for seamless surface integration
- Optimized drive engagement through No. 3 Phillips drive style, reducing cam-out risks during installation
- Consistent thread performance with Class 2A UNC coarse threads providing secure fastening and vibration resistance
- Full threading along 1" length delivers maximum grip strength across the entire fastener engagement
- Hardened durability with Rockwell B80 hardness rating for extended service life in demanding applications
Professional Applications & Engineering Value
These 12-24 UNC flat head screws deliver critical engineering solutions where flush surface mounting and corrosion resistance are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for industrial equipment, marine components, and outdoor machinery. The undercut flat head profile ensures perfect countersinking without material protrusion, while the coarse UNC threads offer superior holding power in various substrates. With fully threaded design and 80,000 psi tensile strength, these Phillips drive screws maintain structural integrity in high-vibration environments, reducing maintenance frequency and downtime.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (12-24 size) and right-hand thread direction. Complies with ASME B18.6.3 manufacturing specifications, ensuring dimensional accuracy and performance reliability. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for hazardous substance restrictions.
