Specification for self-tapping screws and metallic drive screws
Specification for self-tapping screws and metallic drive screws
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What is BS 4174 - Self-tapping screws and metallic drive screws about?
BS 4174 focuses on ferrous and non-ferrous tapping screws and metallic drive screws. Provisions are made for two classes of tapping screw, namely thread forming and thread cutting, each available in several types which are described and illustrated in BS 4174 . BS 4174 provides general dimensions for countersunk, raised countersunk, and pan head tapping screws with slotted or recessed heads, slotted mushroom heads, recessed flange heads and hexagon head tapping screws and round head metallic drive screws. Countersunk and raised countersunk head tapping screws in short lengths have shallower truncated heads than those in normal lengths and separate tables of dimensions are accordingly provided in BS 4174 . Note: BS 4174 does not include round head screws other than metallic drive screws as it is considered that pan head screws provide for most of the applications in which round head screws are normally used and allow more conveniently for the application of torque.
Who is BS 4174 - Self-tapping screws and metallic drive screws for?
BS 4174 on self-tapping screws and metallic drive screws is useful for:
Другие стандарты BS
