Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) - Diameters below ¼ inWhat is BS 3409 2 Specifications for tapped holes about? BS 3409 2 is the second part of the BS 3409 multi series that discusses the specification for the tapping of holes to receive wire thread inserts. BS 3409 2 comprises three sections: Section 1, which specifies limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from No. 2 to No. 12 UNC and UNF Section 2, which recommends screwing taps intended to produce

at the latest by April 2014

1 Defects as determined by visual assessment

angle and crescent test pieces

They can be used by clients and suppliers to demonstrate in real terms a commitment to more responsible business practices

It is not applicable to aircraft re-fuellers

Manufacturers of electric equipment used for railways

• Frequency-scanning technique: measurement

Network security officers

BS ISO 15031-1 gives an overview of the structure and the partitioning of ISO 15031

ISO 20080 on Information for remote diagnostic support — General requirements

BS EN 54-5:2001 specifies the requirements

for example that described in BS ISO 7743