Metric Hex & Lock Nuts

NUTS - MOST COMMON METRIC STANDARD SPECIFICATIONS

DIN 934 Hexagon Nuts
ASTM A194M Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both (Metric)
ANSI B18.16.3M DIMENSIONAL REQUIREMENTS FOR PREVAILING-TORQUE TYPE STEEL METRIC HEX NUTS AND HEX FLANGE NUTS
SAE J995 Mechanical and Material Requirements for Metric Steel Nuts
DIN 985 Nylon Insert Lock Nuts

METRIC HEX NUTS

 

HEX NUTS - BASIC DIMENSIONS

METRIC BASIC DIMENSIONS FINISH NUTS

SizeWidth Across FlatsFinished Full NutsFinished Jam Nut
    Thick-
ness
Thick-
ness
4 7 3.2 2.2
5 8 4 2.7
6 10 5 3.2
7 11 5.5  
8 13 6.5 4
10 17 8 5
12 19 10 6
14 22 11 7
16 24 13 8
18 27 15 9
20 30 27 10
22 32 18 11
24 36 19 12
27 41 22 13.35
30 46 24 15
33 50 26 16.5
36 55 29 18
39 60 31  
42 65 34  
45 70 36  
48 75 38  
52 80 42  

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STANDARD THREAD PITCH

SizeCoarse ThreadFine ThreadExtra Fine Thread
4 0.7    
5 0.8    
6 1.0 0.8  
7 1.0    
8 1.3 1.0  
10 1.5 1.3 1.0
12 1.5 1.3 1.0
14 2.0 1.5  
16 2.0 1.5 1.0
18 2.5 2.0 1.5
20 2.5 2.0 1.5
22 2.5 2.0 1.5
24 3.0 2.0 1.5
27 3.0 2.0 1.5
30 3.5 2.0 1.5
33 3.5 2.0 1.5
36 4.0 3.0 2.0
39 4.0 3.0  
42 4.5 3.0 2.0
45 4.5    
48 5.0 3.0 2.0
52 5.0 2.0  

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METRIC COUPLING NUTS

SizeLengthWidth Across Flats
6 25 10
8 30 13
10 30 17
12 40 19
16 50 24
20 50 30
24 50 36
30 60.0 46.0

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METRIC HEX NUTS - STRENGTH

Property ClassHardnessProof Load Strength (MPa)
6 Rb 70/Rc 32 680 Mpa
Class 8 M6 to M16 Rb80/Rc 32 880 Mpa
Class 8 over M16 Rc 23/Rc 35 920 Mpa
10 Rc 26/36 1040 Mpa

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METRIC HEAVY HEX NUTS - 2H

SizeHeightWrench Size
12-1.75 12 21
14-2 14 24
16-2 16 27
18-2.5 18 30
20-2.5 20 34
22-2.5 22 36
24-3.0 24 41
27-3.0 27 46
30-3.5 30 50
36-4.0 36 60

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BASIC DIMENSIONS NYLON INSERT LOCK NUTS

SizeWidth Across FlatsThicknessWrenching Height
4 7 5.0 2.9
5 8 5.0 3.2
6 10 6.0 4.0
8 13 8.0 5.5
10 17 10.0 6.5
12 19 12.0 8.0
14 22 14.0 9.5
16 24 16.0 10.5
18 27 18.5 13.0
20 30 20.0 14.0
22 32 22.0 15.0
24 36 24.0 15.0
27 41 27.0 17.0
30 46 30.0 19.0
33 50 33.0 22.0
36 55 36.0 25.0
42 65 42.0 29.0
48 75 48.0 36.0

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