GB/T 5276-2015Fasteners -- Bolts, screws, studs and nuts -- Symbols and descriptions of dimensions (English PDF)

National Standard of the People's Republic of China

ICS

21.060.10

Contents

• Foreword4
• 1 Scope6
• 2 Normative references7
• 3 Bolts, screws and studs7
• 3.1 Hexagonal head products7
• 3.2 Hexagon socket head screws8
• 3.3 Hexalobular socket head screws10
• 3.4 Triple square socket head screws11
• 3.5 Cup head square neck bolts (see Figure 13)13
• 3.6 Slotted and cross-recessed head screws (see Figures 14 to 17)13
• 3.7 Studs (see Figure 18)14
• 3.8 Set screws (see Figure 19)14
• 3.9 Headless screws with shank (see Figure 20)15
• 3.10 Ends of parts with external thread15
• 3.11 Thread rolling screws (see Figure 32)16
• 3.12 Thread cutting screws (see Figure 33)16
• 3.13 Tapping screws (see Figure 34)16
• 3.14 Drilling screws with tapping screw head (see Figure 35)17
• 3.15 Symbol and description of dimensions of bolts, screws and studs17
• 4 Nuts32
• 4.1 Hexagon nuts (see Figure 36)32
• 4.2 Prevailing torque type nuts (see Figures 37 to 40)33
• 4.4 Symbol and description of dimensions of nuts34