S-91400A851 1/4"-28 x 5/8" FF-S-92, QQ-P-35, MS51958-80, NASM51958 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
- Superior corrosion resistance with Passivated 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
- High tensile strength of 80,000 psi provides exceptional load-bearing capacity for demanding industrial applications.
- Fine UNF thread with Class 2A fit delivers precise, secure fastening and vibration resistance in machinery assemblies.
- Phillips No. 3 drive design allows for efficient installation with common tools, reducing assembly time.
- Fully threaded shank ensures consistent grip along the entire length, enhancing joint stability.
- Compliance with Fed. Spec. FF-S-92, QQ-P-35, MS51958-80, and NASM51958 guarantees adherence to rigorous industrial standards.
- RoHS 3 and REACH compliance supports environmental regulations and safe use in global markets.
Professional Applications & Engineering Value
This 1/4"-28 UNF Rounded Head Screw is engineered to address critical challenges in industrial settings, such as corrosion-induced failure and vibration loosening. Crafted from Passivated 18-8 Stainless Steel, it offers robust protection against moisture and chemicals, making it ideal for applications in marine, automotive, and food processing equipment. The fine thread design and Class 2A thread fit ensure tight, reliable connections that withstand dynamic loads, while the pan head with Phillips No. 3 drive facilitates quick and secure installation. Its fully threaded configuration provides uniform stress distribution, reducing the risk of joint fatigue in assemblies requiring high tensile strength and durability.
Specification Summary & Compliance
This screw features precise Class 2A thread fit per UNF standards, with a diameter of 0.25" and fine thread spacing for accurate fastening. It complies with Fed. Spec. FF-S-92, QQ-P-35, MS51958-80, and NASM51958, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory adherence in industrial use.
