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ASME B18.31.1M Metric Clamping Full Body Type Studs Dimensions Standards

ASME B18.31.1M Metric Clamping Full Body Type Studs standard covers the complete dimensional and general data for double end metric series studs recognized as an American National Standard.
Double End Stud (clamping type): studs with screw threads of the same length and configuration on each end. This type of stud serves the function of clamping two bodies together with a nut on each end.
NOTE: Double end studs in ASME B18.31.1M standard may be installed with a nut on each end. Similarly, one end may be set in a tapped hole, usually with a locking compound.
The inclusion of dimensional data in ASME B18.31.1M standard is not intended to imply that all products described are stock production items. Consumers should consult with suppliers concerning availability of products.
The Tables measurements are also converted into millimeters to make the information clearer and easier to understand.

ASME B18.31.1M Metric Clamping Full Body Type Studs Dimensions Drawing

ASME B18.31.1M Metric Clamping Full Body Type Studs Dimensions (mm)

Nominal Size
Diameter, D		 Thread Length, B UMax.
= 2P		 Nominal Length, L Body Diameter, DS
LT ≤ 250 250 < LT ≤ 400 LT > 400 Max. Min. (by Length)
Min. Max. Min. Max. Min. Max. Range Incr. LT ≤ 150 LT > 150
M1.6 9.2 9.9 - - - - 0.7 25-50 5 1.60 1.29 1.29
M2 10 10.8 - - - - 0.8 25-50 5 2.00 1.65 1.65
M2.5 11 11.9 - - - - 0.9 30-50 5 2.50 2.12 2.12
M3 12 13 - - - - 1 30-50 5 3.00 2.58 2.58
M4 14 15.4 - - - - 1.4 35-90 5 4.00 3.43 3.43
M5 16 17.6 - - - - 1.6 40-90 5 5.00 4.36 4.36
M6 18 20 24 26 - - 2 50-90
100-160		 5
10		 6.00 5.82 5.70
M8 18 20.5 26.5 24 - - 2.5 50-90
≥ 100		 5
10		 8.00 7.78 7.64
M10 26 29 32 35 45 48 3 60-160
≥ 180		 10
20		 10.00 9.78 9.64
M12 30 33.5 36 39.5 49 52.5 3.5 60-160
≥ 180		 10
20		 12.00 11.73 11.57
M14 34 38 40 44 53 57 4 80-160
≥ 180		 10
20		 14.00 13.73 13.57
M16 38 42 44 48 57 61 4 90-160
≥ 180		 10
20		 16.00 15.73 15.57
M20 46 51 52 57 65 70 5 100-160
> 180		 10
20		 20.00 19.67 19.48
M24 54 60 60 66 73 79 6 130-160
≥ 180		 10
20		 24.00 23.67 23.48
M30 66 73 72 79 85 92 7 150-160
≥ 180		 10
20		 30.00 - 29.48
M36 78 86 84 92 97 105 8 ≥ 200 20 36.00 - 35.38
M42 90 99 96 105 109 118 9 ≥ 240 20 42.00 - 41.38
M48 - - 108 118 121 131 10 ≥ 280 20 48.00 - 47.38
M56 - - 124 135 137 148 11 ≥ 300 20 56.00 - 55.26
M64 - - 140 152 153 165 12 ≥ 340 20 64.00 - 63.26
M72 - - 156 168 169 181 12 ≥ 380 20 72.00 - 71.26
M80 - - 172 184 185 197 12 ≥ 400 20 80.00 - 79.26
M90 - - - - 205 217 12 ≥ 440 20 90.00 - 89.13
M100 - - - - 225 237 12 ≥ 480 20 100.00 - 99.13

ASME B18.31.1M Metric Full Body Clamping Type Studs Length Tolerances (mm)

Nominal Length Tolerance
Over Through
6 10 ± 0.29
10 18 ± 0.35
18 30 ± 0.42
30 50 ± 0.50
50 80 ± 0.95
80 120 ± 1.10
120 180 ± 1.25
180 250 ± 1.45
250 315 ± 1.60
315 400 ± 1.80
400 500 ± 2.00
>500 ... ± 5.00

ASME Material Specifications

ASTM A193/A193M Bolting, Stud Bolts, Screws
ASTM A320/A320M Bolting, Stud Bolts, Screws
ASTM A354 Bolts
ASTM A449 Hex Cap Screws, Bolts, Studs
ASTM A453/A453M Bolting, Stud Bolts, Screws, Nuts
ASTM A574/A574M Standard Specification for Alloy Steel Socket Head Cap Screws
ASTM A1014/A1014M UNS N07718 Bolting, Stud Bolts, Screws, Nuts
ASTM A1082/A1082M Bolting, Stud Bolts, Screws, Nuts
ASTM F1554 Anchor Bolts, Anchor Rods
ASTM F2882 Stud Bolts, Screws, Threaded Rod
ASTM F3042 Socket Set, Square Head Slotted Headless Screw
ASTM F3125/F3125M Heavy Hex Bolts, Screws, Studs
ASTM F468/F468M Bolting, Stud Bolts, Screws
ASTM F593 Bolting, Stud Bolts, Screws
ASTM F738/F738M Stud Bolts, Screws
ASTM F835/F835M Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws
ASTM F837/F837M Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM F880/F880M Standard Specification for Stainless Steel Socket Set Screws
ASTM F901 Aluminium Transmission Tower Bolts
ASTM F912/912M Standard Specification for Alloy Steel Socket Set Screws

EN Material Specifications

EN 10269 Bolting Fasteners, Bolting Stud Bolts, Screws, Nuts, Washers

ISO Material Specifications

ISO 898-1 Bolting Fasteners, Bolting Stud Bolts, Screws
ISO 3506-1 Bolting, Stud Bolts, Screws, Nuts
ISO 3506-5 Bolting, Stud Bolts, Screws, Nuts