S-92949A328 4-48 x 3/8" 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- Precise thread engagement with Class 3A fit and UNF fine threads, ensuring reliable, vibration-resistant connections
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Easy installation and removal with hex drive design providing secure tool grip and reduced cam-out risk
- Full thread coverage along the 3/8" length for maximum holding power in thin materials
- Rounded button head profile delivering a low-profile, finished appearance while minimizing snagging
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
Professional Applications & Engineering Value
Engineered for precision assemblies, these 4-48 UNF fine thread rounded head screws provide exceptional performance in electronics, aerospace, and medical equipment where space constraints and reliability are critical. The 18-8 stainless steel material, combined with a passivated finish, resists oxidation and chemical exposure, extending service life in humid or corrosive conditions. The Class 3A thread fit and fine threading minimize backlash and improve load distribution, reducing the risk of loosening under dynamic stresses. With a hex drive and fully threaded design, these screws ensure quick, secure fastening in tight spaces, enhancing assembly efficiency and structural integrity for OEM and MRO applications.
Specification Summary & Compliance
This product adheres to ASME B18.3 specifications, with threads manufactured to UNF fine thread standards and Class 3A fit for high precision. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. Dimensions include a 3/8" length, 0.213" head diameter, and 1/16" hex drive size, providing consistent performance in industrial fastener systems.
