Metric Fastener Reference Charts: Fastener Mart (2024)

Table of Contents
DIN & ISO Designations Common Metric Sizes Metric vs. Inch Series Sizes Fastener Sizes in Inches Pitch vs. Threads per Inch Millimeters to Inch Conversion
Fastener Mart
www.FastenerMart.com
Common Metric Sizes
Metric vs. Inch Series Sizes
Fastener Sizes in Inches
Pitch vs. Threads per Inch
Millimeters to Inch Conversion

DIN & ISO Designations

No.Description
DIN 84Slotted Cheese Head Machine Screw
DIN 85Slotted Pan Head Machine Screw
DIN 94Cotter Pin
DIN 125AFlat Washer (without Chamfer)
DIN 125BFlat Washer (with Chamfer)
DIN 127BSplit Lock Washer
DIN 137BSpring Wave Washer
DIN 315Wing Nut
DIN 439BMachine Screw Hex Nut
Finished Hex Jam Nut
DIN 911Long Arm Hex Key
DIN 912Hex Socket Head Cap Screw
DIN 916Hex Socket Set Screw
DIN 931Hex Head Cap Screw Partially Threaded
DIN 933Hex Head Cap Screw Fully Threaded
DIN 934Finished Hex Nut
DIN 939Double End Stud
DIN 960Hex Head Cap Screw Partially Threaded
DIN 961Hex Head Cap Screw Fully Threaded
DIN 963Slotted Flat Head Machine Screw
DIN 964Slotted Oval Head Machine Screw
DIN 965Phillips Flat Head Machine Screw
DIN 966Phillips Oval Head Machine Screw
DIN 975Threaded Rod
DIN 980VHex Steel Prevailing Torque Lock Nut
DIN 985Hex Nylon Insert Lock Nut
DIN 6334Rod Coupling Nut
DIN 6797AExternal Tooth Lock Washer
DIN 6797JInternal Tooth Lock Washer
DIN 6912Hex Low Socket Head Cap Screw
DIN 6921Hex Flange Head Screw
DIN 6923Hex Flange Nut
ISO 7379Hex Socket Head Shoulder Screw
ISO 7380Hex Button Socket Head Cap Screw
DIN 7985Phillips Pan Head Machine Screw
DIN 7991Hex Flat Socket Head Cap Screw
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Common Metric Sizes

Coarse
Thread		Fine
Thread
M1.4-0.3
M2-0.4
M2.5-0.45
M3-0.5
M3.5-0.6
M4-0.7
M5-0.8
M6-1.0
M7-1.0
M8-1.25M8-1.0
M10-1.5M10-1.25
M10-1.0
M12-1.75M12-1.5
M12-1.25
M14-2.0M14-1.5
M16-2.0M16-1.5
M18-2.5M18-1.5
M20-2.5M20-1.5
M22-2.5
M24-3.0M24-2.0
M30-3.5
M36-4.0
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Metric vs. Inch Series Sizes

Metric
Size		Closest Inch
Series Size
M1.4-0.30-80 (Larger)
M2-0.41-64 (Smaller)
M2.5-0.453-56 (Larger)
M3-0.54-48 (Smaller)
M3.5-0.66-40 (Larger)
M4-0.78-36 (Larger)
M5-0.810-32 (Smaller)
M6-1.01/4-28 (Larger)
M7-1.01/4-28 (Smaller)
M8-1.255/16-18 (Smaller)
M10-1.53/8-16 (Smaller)
M12-1.751/2-13 (Larger)
M14-2.09/16-12 (Larger)
M16-2.05/8-11 (Smaller)
M18-2.53/4-10 (Larger)
M20-2.53/4-10 (Smaller)
M22-2.57/8-9 (Larger)
M24-3.01-8 (Larger)
M30-3.51 1/8-7 (Smaller)
M36-4.01 3/8-6 (Smaller)
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Fastener Sizes in Inches

Metric &
Inch Size		Diameter
(inches)		Rounded to
Nearest 64th
(inches)
#000.04703/64
M1.40.05511/16
#00.06001/16
#10.07305/64
M20.07875/64
#20.08603/32
M2.50.09843/32
#30.09903/32
#40.11207/64
M30.11811/8
#50.12501/8
M3.50.13789/64
#60.13809/64
M40.15755/32
#80.16405/32
#100.19003/16
M50.196913/64
#120.21607/32
M60.236215/64
1/40.25001/4
M70.27569/32
5/160.31255/16
M80.31505/16
3/80.37503/8
M100.393725/64
7/160.43757/16
M120.472415/32
1/20.50001/2
M140.551235/64
9/160.56259/16
5/80.62505/8
M160.62995/8
M180.708745/64
3/40.75003/4
M200.787425/32
M220.866155/64
7/80.87507/8
M240.944915/16
11.00001
1 1/81.12501 1/8
M301.18111 3/16
1 1/41.25001 1/4
1 3/81.37501 3/8
M361.41731 27/64
1 1/21.50001 1/2
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Pitch vs. Threads per Inch

Pitch
(mm)		Pitch
(inches)		Threads
per Inch
0.20.0079127.00
0.250.0098101.60
0.30.011884.67
0.350.013872.57
0.40.015763.50
0.450.017756.44
0.50.019750.80
0.60.023642.33
0.70.027636.29
0.750.029533.87
0.80.031531.75
1.00.039425.40
1.250.049220.32
1.50.059116.93
1.750.068914.51
2.00.078712.70
2.50.098410.16
3.00.11818.47
3.50.13787.26
4.00.15756.35
4.50.17725.64
5.00.19695.08
5.50.21654.62
6.00.23624.23
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Millimeters to Inch Conversion

Metric
(mm)		Decimal
(inches)		Rounded to
Nearest 64th
(inches)
10.0393/64
1.50.0591/16
20.0795/64
30.1181/8
40.1575/32
50.19713/64
60.23615/64
80.3155/16
100.39425/64
120.47215/32
140.55135/64
160.6305/8
180.70945/64
190.7483/4
200.78725/32
250.98463/64
301.1811 3/16
351.3781 3/8
401.5751 37/64
451.7721 49/64
501.9691 31/32
552.1652 11/64
602.3622 23/64
652.5592 9/16
702.7562 3/4
752.9532 61/64
803.1503 5/32
853.3463 11/32
903.5433 35/64
1003.9373 15/16
1104.3314 21/64
1204.7244 23/32
1305.1185 1/8
1405.5125 33/64
1505.9065 29/32
1606.2996 19/64
1706.6936 11/16
1807.0877 3/32
1907.4807 31/64
2007.8747 7/8
2208.6618 21/32
2409.4499 29/64
26010.23610 15/64
27010.63010 5/8
28011.02411 1/32
30011.81111 13/16
32012.59812 19/32
34013.38613 25/64
36014.17314 11/64
38014.96114 61/64
40015.74815 3/4
42016.53516 17/32
44017.32317 21/64
46018.11018 7/64
48018.89818 57/64
50019.68519 11/16
52020.47220 15/32
54021.26021 17/64
56022.04722 3/64
58022.83522 53/64
60023.62223 5/8
62024.40924 13/32
64025.19725 13/64
66025.98425 63/64
68026.77226 49/64
70027.55927 9/16
72028.34628 11/32
74029.13429 9/64
76029.92129 59/64
78030.70930 45/64
80031.49631 1/2
82032.28332 9/32
84033.07133 5/64
86033.85833 55/64
88034.64634 41/64
90035.43335 7/16
92036.22036 7/32
94037.00837 1/64
96037.79537 51/64
98038.58338 37/64
100039.37039 3/8
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NOTE: Charts are for reference only.


Metric Fastener Reference Charts: Fastener Mart (2024)
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