Specifications

Binding Undercut Head Phillips Machine Screw
Standard: ASME B18.6.3
Drive Style: Cross recessed, Type 1.

Binding Undercut Head Phillips Machine Screw

 Specification Requirements:
• Standard: ASME B18.6.3
• Drive Style: Cross recessed, Type 1.
• Material: Carbon Steel, 60,000 PSI Min. Tensile
• Thread requirements: ASME B1.1 UNC & UNF Class 2A. (Fastenal will inspect and
accept parts with a 1A no-go-gauge)
• Coating: Fe/Zn 3AT Per ASTM F1941 Machine thread type is used in a pre-tapped hole with or without a nut. The Binding Head features a 10% larger bearing surface than pan head screws and may have an undercut on the bearing surface near the shank of the screw. Zinc plating, retards the corrosion rate in a normal atmosphere.