S-92949A564 1/4"-28 x 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 thanks to 18-8 stainless steel construction and a passivated finish, ideal for harsh environments.
- Superior thread engagement and vibration resistance with a Class 3A fine thread fit, ensuring reliable, secure fastening.
- High-strength performance with a 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Easy installation and a clean, low-profile appearance provided by the rounded button head and 5/32" hex drive.
- Maximum grip and holding power from the fully threaded design along the entire 3/4" length.
- Guaranteed dimensional consistency and interchangeability through compliance with the ASME B18.3 standard.
- Safe for use in regulated industries as it is RoHS 3 and REACH compliant.
Professional Applications & Engineering Value
This 1/4"-28 UNF Rounded Head Screw is engineered to solve critical challenges in industrial assembly and precision machinery. The combination of 18-8 Stainless Steel and a passivated finish provides a robust defense against corrosion, significantly extending service life in moist or chemically aggressive environments. The Class 3A thread fit and fine thread spacing deliver exceptional clamp load retention, making it an ideal choice for applications prone to vibration, such as in automotive sub-assemblies, electronic enclosures, and aerospace components. The button head style with a hex drive offers a secure, flush installation that minimizes protrusion, protecting both the fastener and surrounding components from damage.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF thread with a precision Class 3A fit for superior thread engagement. It is manufactured in full compliance with the ASME B18.3 standard, ensuring dimensional accuracy and reliability. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.
