The following tables show standard dimensions for keys and their grooves.
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CLEARANCE HOLE CHART
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Clearance hole chart for inch bolts and screws according to ASME B18.2.8
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CLEARANCE HOLE CHART
Clearance hole chart for inch bolts and screws according to ASME B18.2.8
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Pigment/Binder Ratio
One of the earliest forms of comparison. The pigment/binder ratio is the weight ratio of the sum of the pigments...
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CLEARANCE HOLE CHART
Clearance hole chart for inch bolts and screws according to ASME B18.2.8
| Clearance Hole Chart for Inch Fasteners | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Nominal Screw Size |
Fit Class - Normal | Fit Class - Close | Fit Class - Loose | ||||||
| Nominal Drill Size |
Hole Diameter | Nominal Drill Size |
Hole Diameter | Nominal Drill Size |
Hole Diameter | ||||
| Min. | Max. | Min. | Max. | Min. | Max. | ||||
| #0 | #48 | 0.076 | 0.082 | #51 | 0.067 | 0.071 | 3/32 | 0.094 | 0.104 |
| #1 | #43 | 0.089 | 0.095 | #46 | 0.081 | 0.085 | #37 | 0.104 | 0.114 |
| #2 | #38 | 0.102 | 0.108 | 3/32 | 0.094 | 0.098 | #32 | 0.116 | 0.126 |
| #3 | #32 | 0.116 | 0.122 | #36 | 0.106 | 0.110 | #30 | 0.128 | 0.140 |
| #4 | #30 | 0.128 | 0.135 | #31 | 0.120 | 0.124 | #27 | 0.144 | 0.156 |
| #5 | 5/32 | 0.156 | 0.163 | 9/64 | 0.141 | 0.146 | 11/64 | 0.172 | 0.184 |
| #6 | #18 | 0.170 | 0.177 | #23 | 0.154 | 0.159 | #13 | 0.185 | 0.197 |
| #8 | #9 | 0.196 | 0.203 | #15 | 0.180 | 0.185 | #3 | 0.213 | 0.225 |
| #10 | #2 | 0.221 | 0.228 | #5 | 0.206 | 0.211 | B | 0.238 | 0.250 |
| 1/4 | 9/32 | 0.281 | 0.290 | 17/64 | 0.266 | 0.272 | 19/64 | 0.297 | 0.311 |
| 5/16 | 11/32 | 0.344 | 0.354 | 21/64 | 0.328 | 0.334 | 23/64 | 0.359 | 0.373 |
| 3/8 | 13/32 | 0.406 | 0.416 | 25/64 | 0.391 | 0.397 | 27/64 | 0.422 | 0.438 |
| 7/16 | 15/32 | 0.469 | 0.479 | 29/64 | 0.453 | 0.460 | 31/64 | 0.484 | 0.500 |
| 1/2 | 9/16 | 0.562 | 0.572 | 17/32 | 0.531 | 0.538 | 39/64 | 0.609 | 0.625 |
| 5/8 | 11/16 | 0.688 | 0.698 | 21/32 | 0.656 | 0.663 | 47/64 | 0.734 | 0.754 |
| 3/4 | 13/16 | 0.812 | 0.824 | 25/32 | 0.781 | 0.789 | 29/32 | 0.906 | 0.926 |
| 7/8 | 15/16 | 0.938 | 0.950 | 29/32 | 0.906 | 0.914 | 1-1/32 | 1.031 | 1.051 |
| 1 | 1-3/32 | 1.094 | 1.106 | 1-1/32 | 1.031 | 1.039 | 1-5/32 | 1.156 | 1.181 |
| 1-1/8 | 1-7/32 | 1.219 | 1.235 | 1-5/32 | 1.156 | 1.164 | 1-5/16 | 1.312 | 1.337 |
| 1-1/4 | 1-11/32 | 1.344 | 1.360 | 1-9/32 | 1.281 | 1.291 | 1-7/16 | 1.438 | 1.463 |
| 1-3/8 | 1-1/2 | 1.500 | 1.516 | 1-7/16 | 1.438 | 1.448 | 1-39/64 | 1.609 | 1.634 |
| 1-1/2 | 1-5/8 | 1.625 | 1.641 | 1-9/16 | 1.562 | 1.572 | 1-47/64 | 1.734 | 1.759 |
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