S-91249A119 4-40 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibrations.
- Rockwell B70 hardness provides superior durability and resistance to wear over time.
- Fully threaded design offers maximum grip and uniform clamping force across the entire length.
- Class 2A coarse UNC threads enable quick assembly and reduce cross-threading risks in various materials.
- Phillips drive with No. 1 size allows for efficient installation using standard tools, minimizing slippage.
- Rounded pan head profile delivers a low-profile finish that reduces snagging and improves safety.
Professional Applications & Engineering Value
These 4-40 UNC rounded pan head Phillips screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The Black-Oxide coating on 18-8 Stainless Steel significantly enhances corrosion resistance, making them suitable for outdoor equipment, marine applications, and chemical processing industries where moisture and chemicals are prevalent. The coarse thread design ensures fast, secure fastening in metals, plastics, and composite materials, reducing installation time and labor costs. With a fully threaded body and high tensile strength, they provide consistent clamping force in dynamic environments, preventing joint failure and maintenance downtime. Ideal for machinery, electronics, and automotive assemblies, these screws offer long-term reliability and compliance with stringent industry standards.
Specification Summary & Compliance
This screw features precise Class 2A thread fit with UNC coarse threading, ensuring dimensional accuracy and interchangeability. It is manufactured in compliance with ASME B18.6.3 specifications for consistent quality and performance. Additionally, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming it is free from hazardous substances and safe for use in various industrial and consumer applications.
