ASME B18.2.1 Length Tolerance Chart for Bolts and Screws
ASME B18.2.1 Length Tolerance Chart for Bolts and Screws
Length Tolerances for Bolts
| Nomianal Length | Nominal Size | |||||
|---|---|---|---|---|---|---|
| 1/4 to 3/8 | 7/16 and 1/2 | 9/16 to 3/4 | 7/8 to 1 | 1 1/8 to 1 1/2 | Over 1 1/2 | |
| Up to 1 in., incl. | +0.02 -0.03 |
+0.02 -0.03 |
+0.02 -0.03 |
... ... |
... ... |
... ... |
| Over 1 in. to 2 1/2 in., incl. | +0.02 -0.04 |
+0.04 -0.06 |
+0.06 -0.08 |
+0.08 -0.10 |
+0.12 -0.12 |
+0.18 -0.18 |
| Over 2 1/2 in. to 4 in., incl. | +0.04 -0.06 |
+0.06 -0.08 |
+0.08 -0.10 |
+0.10 -0.14 |
+0.16 -0.16 |
+0.20 -0.20 |
| Over 4 in. to 6 in., incl. | +0.06 -0.10 |
+0.08 -0.10 |
+0.10 -0.10 |
+0.12 -0.16 |
+0.18 -0.18 |
+0.22 -0.22 |
| Longer than 6 in. | +0.10 -0.18 |
+0.12 -0.18 |
+0.14 -0.18 |
+0.16 -0.20 |
+0.22 -0.22 |
+0.24 -0.24 |
Length Tolerances for Screws
| Nomianal Length | Nominal Size | |||||
|---|---|---|---|---|---|---|
| 1/4 to 3/8 | 7/16 and 1/2 | 9/16 to 3/4 | 7/8 to 1 | 1 1/8 to 1 1/2 | Over 1 1/2 | |
| Up to 1 in., incl. | +0.00 -0.03 |
+0.00 -0.03 |
+0.00 -0.03 |
... ... |
... ... |
... ... |
| Over 1 in. to 2 1/2 in., incl. | +0.00 -0.04 |
+0.00 -0.06 |
+0.00 -0.08 |
+0.00 -0.10 |
+0.00 -0.12 |
+0.00 -0.18 |
| Over 2 1/2 in. to 4 in., incl. | +0.00 -0.06 |
+0.00 -0.08 |
+0.00 -0.010 |
+0.00 -0.14 |
+0.00 -0.16 |
+0.00 -0.20 |
| Over 4 in. to 6 in., incl. | +0.00 -0.10 |
+0.00 -0.10 |
+0.00 -0.10 |
+0.00 -0.16 |
+0.00 -0.18 |
+0.00 -0.22 |
| Longer than 6 in. | +0.00 -0.18 |
+0.00 -0.18 |
+0.00 -0.18 |
+0.00 -0.20 |
+0.00 -0.22 |
+0.00 -0.24 |
