Fastener Tech Data / Charts
Fastener Selection Guide
Pictorial Table of Fasteners
Metric Screw Thread Chart
Metric Tap Size |
Tap Drill in Inches |
Clearance Drill in Inches |
M1.6 x .35 |
#55 (.052) |
#50 (.070) |
M1.8 x .35 |
#53 (.057) |
#48 (.076) |
M2 x .4 |
#52 (.063) |
#45 (.082) |
M3 x .5 |
#39 (.0995) |
1/8 (.125) |
M3.5 x .6 |
#32 (.116) |
#28 (.140) |
M4 x .7 |
#29 (.136) |
#19 (.166) |
M4.5 x .75 |
#25 (.1495) |
#14 (.182) |
M5 x .8 |
#18 (.169) |
#7 (.201) |
M6 x 1 |
#8 (.199) |
“C” (.242) |
M7 x 1 |
“B” (.238) |
9/32 (.281) |
M8 x 1.25 |
“I” (.272) |
“P” (.323) |
M8 x 1 |
“J” (.272) |
“P” (.323) |
M10 x 1.5 |
“K” (.339) |
13/32 (.406) |
M10 x 1.25 |
“S” (.348) |
13/32 (.406) |
M12 x 1.75 |
13/32 (.406) |
31/64 (.484) |
M12 x 1.25 |
27/64 (.421) |
31/64 (.484) |
M14 x 2 |
31/64 (.484) |
9/16 (.562) |
M14 x 1.5 |
1/2 (.500) |
9/16 (.562) |
M16 x 2 |
9/16 (.562) |
41/64 (.640) |
M16 x 1.5 |
37/64 (.578) |
41/64 (.640) |
M18 x 2.5 |
5/8 (.625) |
23/32 (.718) |
M18 x 1.5 |
21/32 (.656) |
23/32 (.718) |
M20 x 2.5 |
45/64 (.703) |
13/16 (.812) |
M20 x 1.5 |
47/64 (.734) |
13/16 (.812) |
Outside Diameter of Screws in Inches
MM |
Inches |
|
MM |
Inches |
|
MM |
Inches |
1.6 |
.063 |
|
6.0 |
.236 |
|
19 |
.748 |
1.8 |
.071 |
|
7.0 |
.275 |
|
20 |
.787 |
2.0 |
.078 |
|
8.0 |
.315 |
|
21 |
.827 |
3.0 |
.118 |
|
10.0 |
.394 |
|
22 |
.866 |
3.5 |
.138 |
|
12 |
.472 |
|
|
|
4.0 |
.157 |
|
14 |
.551 |
|
|
|
4.5 |
.177 |
|
16 |
.630 |
|
|
|
5.0 |
.197 |
|
18 |
.708 |
|
|
|
Minimum Strengths
METRIC (ISO 898) |
INCH (SAE J429) |
|
= | ||
Grade 4, 8 (4.6, 5.8)
|
|
Grade 2
|
= | ||
Grade 8.8
|
|
Grade 5
|
= | ||
Grade 10.9
|
Grade 8
|
|
= | ||
Grade 12.9
|
Grade ASTM-A574
|
Size – Nominal Diameter |
Pitch |
Tap Drill
|
M 1.60 |
0.35 |
1.25 |
M 2.00 |
.04 |
1.6 |
M 2.50 |
0.45 |
2 |
M 3.00 |
0.5 |
2.5 |
M 3.50 |
0.6 |
2.9 |
M 4.00 |
0.7 |
3.3 |
M 5.00 |
0.8 |
4.2 |
M 6.00 |
1 |
5 |
M 8.00 |
1.25 |
6.8 |
M 10.00 |
1.5 |
8.5 |
M 12.00 |
1.75 |
10.2 |
M 14.00 |
2 |
12 |
M 16.00 |
2 |
14 |
M 20.00 |
2.5 |
17.5 |
M 22.00 |
2.5 |
19.5 |
M 24.00 |
3 |
21 |
M 27.00 |
3 |
24 |
M 30.00 |
3.5 |
26.5 |
M 36.00 |
4 |
32 |
M 42.00 |
4.5 |
37.5 |
M 48.00 |
5 |
43 |
M 56.00 |
5.5 |
50.5 |
M 64.00 |
6 |
58 |
M 68.00 |
6 |
62 |