S-91773A741 4-48 x 1/4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round 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 18-8 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
- Superior mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for reliable, high-stress fastening applications.
- Precise and secure thread engagement with a Class 2A UNF fine thread fit, minimizing the risk of loosening under vibration.
- Efficient installation and removal facilitated by the No. 1 Phillips drive and rounded head design, reducing assembly time and tool slippage.
- Full-length threading for maximum grip and holding power along the entire 1/4" length of the screw.
- Compliance with major industry standards including ASME B18.6.3, ensuring dimensional consistency and interchangeability.
- Environmentally responsible manufacturing that meets RoHS 3 and REACH regulations, supporting your green procurement initiatives.
Professional Applications & Engineering Value
This 4-48 UNF fine thread screw is engineered to solve critical challenges in precision assembly. The combination of 18-8 Stainless Steel and a passivated finish provides robust defense against oxidation and chemical exposure, making it a top choice for electronics, instrumentation, and marine applications. The UNF fine thread and Class 2A fit ensure a tight, secure connection in tapped holes, reducing the risk of strip-out in softer materials or thin sections. The rounded head with a Phillips drive offers a low-profile, flush finish while allowing for efficient torque application, streamlining production lines and maintenance procedures where reliability is non-negotiable.
Specification Summary & Compliance
This screw features a 4-48 UNF fine thread with a Class 2A thread fit for standard clearance and ease of assembly. It is manufactured to meet the dimensional requirements of ASME B18.6.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its adherence to restricted substance directives.
