New Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 3) which is identical to ISO 7051 : 2011 'Cross-recessed raised countersunk (oval) head tapping screws' issued by the International Organization for Standardization was adopted by the Bureau of Indian Standards on the recommendation of the General Engineering and Fasteners Standards Sectional Committee and approval of the Production and General Engineering Division Council.

Cross recessed tapping screws are a type of fastener designed for efficiently joining two or more materials together. These are externally threaded fasteners that 'tap' their own mating threads in metallic and non-metallic (such as plastic) materials. Some screws require a hole, while others drill their own hole ('self-drilling'). These screws feature a unique cross-shaped indentation on their head, which corresponds to a specialized screwdriver or bit. This design allows for easy and secure driving of the screw into the material.

Tapping screws are also sometimes called sheet metal screw. Cross recessed tapping screws can be used for fastening objects to thin metal, wood or plastic. These screws are commonly used in a wide range of industries, including woodworking, metalworking, electronics, automotive, and more.