Specifies requirements for high strength steel bolts of property class 8.8 and steel nuts of property class 8 with ISO metric coarse pitch series threads and associated washers in diameters from 16 mm to 36 mm inclusive, mainly intended for use in steel structures.
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.5 MARKING (see Figure 1.1)
1.5.1 Bolts
1.5.2 Nuts
1.5.3 Washers
1.6 DESIGNATION
1.6.1 Bolts
1.6.2 Nuts
1.6.3 Washers
2 HIGH-STRENGTH STEEL BOLTS
2.1 METHOD OF MANUFACTURE
2.2 SHAPE, DIMENSIONS AND FINISH
2.2.1 Head
2.2.2 Length
2.2.3 Ends
2.2.4 Screw threads
2.2.4.1 General
2.2.4.2 Tolerances
2.2.5 Thread length (b)
2.2.6 Squareness, concentricity and symmetry
2.2.6.1 Squareness of bearing face
2.2.6.2 Concentricity of shank to screw thread
2.2.6.3 Symmetry of head to shank
2.2.7 Chamfering and washer facing
2.2.8 Shank
2.2.8.1 Diameter
2.2.8.2 Straightness
2.2.9 Underhead fillet
2.2.10 Finish
2.2.10.1 General
2.2.10.2 Surface roughness
2.2.10.3 Surface finish
2.2.10.4 Coatings
2.3 MATERIALS AND MECHANICAL PROPERTIES
2.4 TEST METHODS
3 HIGH-STRENGTH STEEL NUTS
3.1 METHOD OF MANUFACTURE
3.2 SHAPE, DIMENSIONS AND FINISH
3.2.1 General
3.2.2 Screw threads
3.2.2.1 General
3.2.2.2 Tolerances
3.2.3 Chamfering, washer facing and countersinking
