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(Non-preferred) dimensions in parentheses.

Unit:mm

High Strength Bolts with Large Hexagon Head Assemblies for Steel Structures

GB /T 1231 (assemblies) - 2024

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国标GB /T1231 (assemblies) - 2024 GB1231 1 High Strength Bolts with Large Hexagon Head Assemblies for Steel Structures
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Size
Assemblies M12 M16 M20 (M22) M24 (M27) M30 (M33) M36
1
2
3
4
螺栓/bolt M12 M16 M20 M22 M24 M27 M30 M33 M36
垫圈A/washer A 12 16 20 22 24 27 30 33 36
垫圈B/washer B 12 16 20 22 24 27 30 33 36
螺母/nut M12 M16 M20 M22 M24 M27 M30 M33 M36
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Similar Standards

1 Screw and Washer Assemblies Made of Steel with Plain Washers – Washer Hardness Classes 200 HV and 300 HV [DIN EN ISO]
DIN EN ISO 10644 - 1998 		Screw and Washer Assemblies Made of Steel with Plain Washers – Washer Hardness Classes 200 HV and 300 HV

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2 Hexagon Head Bolts and Plain Washers Assemblies [DIN]
DIN 6900-1 - 1990 		Hexagon Head Bolts and Plain Washers Assemblies

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3 Cross Recessed Hexagon Bolt with Indentation and Plain Washer Assemblies [GB]
GB 9074.11 - 1988 		Cross Recessed Hexagon Bolt with Indentation and Plain Washer Assemblies

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4 Cross Recessed Hexagon Bolt with Indentation and Single Coil Spring Lock Washer Assemblies [GB]
GB 9074.12 - 1988 		Cross Recessed Hexagon Bolt with Indentation and Single Coil Spring Lock Washer Assemblies

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5 Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies [GB]
GB 9074.13 - 1988 		Cross Recessed Hexagon Bolt with Indentation, Single Coil Lock Washer and Plain Washer Assemblies

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6 Small Recessed Hex Head Bolts and Flat Washer Combination [JIS]
JIS B 1187 (T8) - 2017 		Small Recessed Hex Head Bolts and Flat Washer Combination

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7 Small Recessed Hex Head Bolts and Flat Washer Combination [JIS]
JIS B 1187 - 1995 		Small Recessed Hex Head Bolts and Flat Washer Combination

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8 Hexagon Head Bolts (Full Thread) and Washer Assemblies with Plain Washers [DIN EN ISO]
DIN EN ISO 10644 (S1) 		Hexagon Head Bolts (Full Thread) and Washer Assemblies with Plain Washers
9 Hex Head Screw and Helical Spring Lock Washers for SEMS [ASME]
ASME B 18.13 - 2017 		Hex Head Screw and Helical Spring Lock Washers for SEMS
10 Metric Hexagon Cap Screw and Spring Washer Assemblies-SEMS (Machine Screw Thread Diameter) [ASME/ANSI]
ASME/ANSI B 18.13.1M - 2011 		Metric Hexagon Cap Screw and Spring Washer Assemblies-SEMS (Machine Screw Thread Diameter)
11 Hexagon Head Bolts and Washer Assemblies with Plain Washers [DIN EN ISO]
DIN EN ISO 10644 (S2) 		Hexagon Head Bolts and Washer Assemblies with Plain Washers
12 Hexagon Cap Screw and Spring Washer Assemblies - SEMS [ASME/ANSI]
ASME/ANSI B 18.13 - 1996 		Hexagon Cap Screw and Spring Washer Assemblies - SEMS
13 Small Hexagon Cap Screw and Spring Washer Assemblies [JIS]
JIS B 1187 - 1995 		Small Hexagon Cap Screw and Spring Washer Assemblies
14 Small Hexagon Head Bolt and Flat Washer Assemblies [JIS]
JIS B 1187 (T6) - 2017 		Small Hexagon Head Bolt and Flat Washer Assemblies
15 Cross Recessed Pan Screw Assemblies with Washers [JIS]
JIS B 1130 - 2012 		Cross Recessed Pan Screw Assemblies with Washers
16 Small Hexagon Head Bolt and Flat Washer Assemblies [JIS]
JIS B 1187 - 1995 		Small Hexagon Head Bolt and Flat Washer Assemblies
17 Small Hexagon Cap Screw and Spring Washer Assemblies [JIS]
JIS B 1187 (T6) - 2017 		Small Hexagon Cap Screw and Spring Washer Assemblies
18 Hexagon Head Bolt and Plain Washer Assemblies [JIS]
JIS B 1187 - 1995 		Hexagon Head Bolt and Plain Washer Assemblies
19 Hexagon Head Bolts and Single Coil Spring Lock Washer Assemblies [GB]
GB 9074.15 - 1988 		Hexagon Head Bolts and Single Coil Spring Lock Washer Assemblies
20 Hexagon Head Bolts (Full Thread) And Washer Assemblies with Plain Washers [GB]
GB /T 9074.1 (S1) 		Hexagon Head Bolts (Full Thread) And Washer Assemblies with Plain Washers
21 Hexagon Head Bolt and Plain Washer Assemblies [GB]
GB 9074.14 - 1988 		Hexagon Head Bolt and Plain Washer Assemblies
22 Hexagon Head Tapping Screws and Plain Washer Assemblies [JIS]
JIS B 1130 - 2006 		Hexagon Head Tapping Screws and Plain Washer Assemblies
23 Hexagon Head Bolts and Washer Assemblies with Plain Washers [GB]
GB /T 9074.1 (S2) 		Hexagon Head Bolts and Washer Assemblies with Plain Washers
24 Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies [JIS]
JIS B 1187 (T4) - 2017 		Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies
25 Small Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies [JIS]
JIS B 1187 (T6) - 2017 		Small Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies
26 Hexagon Cap Screw and Spring Washer Assemblies [JIS]
JIS B 1187 - 1995 		Hexagon Cap Screw and Spring Washer Assemblies
27 Hexagon Cap Screw and Spring Washer Assemblies [JIS]
JIS B 1187 (T4) - 2017 		Hexagon Cap Screw and Spring Washer Assemblies
28 Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies [GB]
GB 9074.16 - 1988 		Hexagon Head Bolt and Serrated Lock Washer External Teeth Assemblies
29 Hexagon Head Bolt, Single Coil Spring Lock Washer and Plain Washer Assemblies [GB]
GB 9074.17 - 1988 		Hexagon Head Bolt, Single Coil Spring Lock Washer and Plain Washer Assemblies
30 Hexagon Head Bolt and Plain Washer Assemblies [JIS]
JIS B 1187 (T4) - 2017 		Hexagon Head Bolt and Plain Washer Assemblies
31 Hexagon Head Screws and Spring Washer Assemblies [KS]
KS B 1040 - 2012 (R2022) 		Hexagon Head Screws and Spring Washer Assemblies
32 Hexagon Head Bolt and Plain Washer Assemblies [KS]
KS B 1040 - 2012 (R2022) 		Hexagon Head Bolt and Plain Washer Assemblies
33 Hexagon Head Screws and Spring Washer Assemblies [KS]
KS B 1040 - 1998 		Hexagon Head Screws and Spring Washer Assemblies
34 Hexagon Head Bolt and Plain Washer Assemblies [KS]
KS B 1040 - 1998 		Hexagon Head Bolt and Plain Washer Assemblies