Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) - Diameters ¼ in and over1 Scope This British Standard comprises three sections: Section 1, which specifies limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from in to 1 in UNC inclusive and from in to1in UNF inclusive; Section 2, which recommends screwing taps intended to produce holes to the limits of size specified in Section 1; Section 3, which gives a recommended gauging system for checking the tapped holes. Figure 1 Basic form

The title of the standard is changed and adapted to the series as Part 3-4

BS EN 764-2 is the European Standard which specifies the basic quantities

BS EN 71‑4 is the 14th part of the multi-series and focuses on the safety of trampolines for domestic use

The requirements specified in this standard apply for:

11 Free height of fall

IEC 61000-1-1:1992

or the deliberate differentiation between types of electromagnetic environments relevant to the equipment in BS EN IEC 61326-3-2

to ensure the public is protected from any unscrupulous activity of puported investigators

BS 6174 applies only to transmitters with a linear relationship between differential pressure input and current output for general industrial use

BS EN ISO 19014‑3:2018 supersedes ISO 15998 which is withdrawn

and educational organizations

Conventions and definitions