EN 14399 - Mechanical Properties for Washers inc. DTI washer
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EN 14399 Mechanical properties for Washers

Mechanical Properties

EN 14399 Part 5: Plain Washer

Mechanical Properties Requirement
VICKERS HARDNESS 300 HV to 370 HV

BS EN 14399-5: High-strength structural bolting assemblies for preloading. Plain washers

EN 14399 Part 6: Plain Chamfered Washer

Mechanical Properties Requirement
VICKERS HARDNESS 300 HV to 370 HV

BS EN 14399-6: High-strength structural bolting assemblies for preloading. Plain chamfered washers

EN 14399 Part 9: Nut Face / Bolt Face Washer

Mechanical Properties Requirement
HEAT TREATMENT HARDENED AND TEMPERED
ROCKWELL HARDNESS 38 HRC TO 45 HRC
VICKERS HARDNESS 372 HV30 TO 448 HV30

BS EN 14399-9: High strength structural bolting for preloading. System HR or HV. Direct tension indicators for bolt and nut assemblies

EN 14399 Part 9: Direct Tension Indicators (DTI)

Direct Tension Indicators Washer Direct Tension Indicators Washer

Mechanical Properties Requirement
HEAT TREATMENT HARDENED AND TEMPERED OR CONTROLLED ROLLED AND TEMPERED
MAXIMUM HARDNESS 380 HV (~38.8 HRC)

BS EN 14399-9: High strength structural bolting for preloading. System HR or HV. Direct tension indicators for bolt and nut assemblies

Washers to be used with high strength structural bolting for preloading. System HR or HV.

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