2. Other products referenced in EN standards

2.1 HV bolts

These bolts are very common on the European market, as they are less expensive than HR bolts. Initially conforming to the specifications of a German DIN standard (their name comes from the German "Hochfest Vorgespann" meaning "high strength for prestressing"), they are now standardized at European level (standard NF EN 14399-4) and can be used as high-strength bolts suitable for prestressing.

Screw and nut are marked "HV". The washers are for the HR system.

Their mechanical characteristics differ from those of HR bolts:

• only available in 10.9 quality;

• The height of the nuts is lower than that of the HR bolts (approximately 80% of the nominal...