Table 10. ANSI/ASME Standard Transition Locational Fits ANSI/ASME B4.1-1967 (2009; out of print)
Class LT 1
Class LT 2
Class LT 3
Class LT 4
Class LT 5
Class LT 6
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Nominal Size Range, Inches
Hole H7
Shaft js6
Hole H8
Shaft js7
Hole H7
Shaft k6
Hole H8
Shaft k7
Hole H7
Shaft n6
Hole H7
Shaft n7
Fit a
Fit a
Fit a
Fit a
Fit a
Fit a
Over
To
Values shown below are in thousandths of an inch
+0.4
+0.12 –0.2 –0.12 +0.8 –0.15 +0.95 +0.2 –0.3 –0.2 +1.2 –0.2 +1.35 +0.25 –0.4 –0.25 +1.6 +0.3 –0.5 –0.3 +2.1 +0.3 –0.6 –0.3 +2.4 +0.4 –0.7 –0.4 +2.9 +0.5 –0.8 –0.5 +3.3 +0.6 –0.9 –0.6 +3.7 +0.6 –1.0 –0.6 +4.0 +0.7 –1.0 –0.7 +4.5 +0.8 –1.2 –0.8 +5.2
+0.6
+0.2 –0.2 +0.25 –0.25
+0.4
+0.5 –0.65 +0.4 +0.65
–0.5 +0.15 –0.6 +0.2
0 - 0.12 –0.12
+0.52
0
0
0
+0.25 +0.15
0
+0.25
+0.5
+0.15 –0.25 +0.7
+0.5
+0.6 –0.8 +0.5 +0.8
0.12 - 0.24 –0.15
+0.65
0
0
0
+0.3 +0.2
0
+0.3
+0.6
+0.9
+0.3 –0.5 +0.6
+0.5 –0.7 +0.9
+0.7 –0.8 +0.1 +0.2 +0.8 –0.9 +0.1 +0.2 +0.9 –1.1 +0.1 +0.2 +1.1 –1.3 +0.1 +0.3 +1.3 –1.5 +0.1 +0.4 +1.5 –1.9 +0.1 +0.4 +1.7 –2.2 +0.1 +0.4 +2.0 –2.6 +0.2 +0.4 +2.2 –2.6 +0.2 +0.6 +2.4 –3.0 +0.2 +0.6 +2.7 –3.4 +0.2 +0.7
+0.6
+0.8 –1.0 +0.6 +1.0
0.24 - 0.40 –0.2
+0.8
0
0
0
+0.1 +0.8
0
0
+0.4 +0.2
0
+0.4
–0.3 +0.5
+0.7
+0.2 –0.35 +1.0
+0.35 –0.5 +0.7
+0.5 –0.8 +1.0
+0.7
+0.9 –1.2 +0.7 +1.2
0.40 - 0.71 –0.2
+0.9
0
0
0
+0.1 +0.9
0
0
+0.5 +0.2
0
+0.5
–0.35 +0.6
+0.8
+1.2
+0.4 –0.6 +0.8
+0.6 –0.9 +1.2
+0.8
+1.1 –1.4 +0.8 +1.4
0.71 - 1.19 –0.25
+1.05
0
0
0
+0.1 +1.1
0
0
+0.6 +0.2
0
+0.6
–0.4 +0.7
+1.0
+1.6
+0.5 –0.7 +1.0
+0.7 –1.1 +1.6
+1.0
+1.3 –1.7 +1.0 +1.7
1.19 - 1.97 –0.3
+1.3
0
0
0
+0.1 +1.5
0
0
+0.7 +0.3
0
+0.7
–0.5 +0.9
+1.2
+1.8
+0.6 –0.8 +1.2
+0.8 –1.3 +1.8
+1.2
+1.5 –2.0 +1.2 +2.0
1.97 - 3.15 –0.3
+1.5
0
0
0
+0.1 +1.7
0
0
+0.8 +0.4
0
+0.8
–0.6 +1.1
+1.4
+2.2
+0.7 –1.0 +1.4
+1.0 –1.5 +2.2
+1.4
+1.9 –2.4 +1.4 +2.4
3.15 - 4.73 –0.4
+1.8
0
0
0
+0.1 +2.1
0
0
+1.0 +0.4
0
+1.0
–0.7 +1.3
+1.6
+2.5
+0.8 –1.1 +1.6
+1.1 –1.7 +2.5
+1.6
+2.2 –2.8 +1.6 +2.8
4.73 - 7.09 –0.5
+2.1
0
0
0
+0.1 +2.4
0
0
+1.2 +0.4
0
+1.2
–0.8 +1.5
+1.8
+2.8
+0.9 –1.4 +1.8
+1.4 –2.0 +2.8
+1.8
+2.6 –3.2 +1.8 +3.2
7.09 - 9.85 –0.6
+2.4
0
0
0
+0.2 +2.6
0
0
+1.4 +0.4
0
+1.4
–0.9 +1.6
+2.0
+3.0
+1.0 –1.4 +2.0
+1.4 –2.2 +3.0
+2.0
+2.6 –3.4 +2.0 +3.4
9.85 - 12.41 –0.6
+2.6
0
0
0
+0.2 +2.8
0
0
+1.4 +0.6
0
+1.4
–1.0 +1.8
+2.2
+3.5
+1.0 –1.6 +2.2
+1.6 –2.4 +3.5
+2.2
+3.0 –3.8 +2.2 +3.8
12.41 - 15.75 –0.7
+2.9
0
0
0
+0.2 +3.3
0
0
+1.6 +0.6
0
+1.6
–1.0 +2.0
+2.5
+4.0
+1.2 –1.8 +2.5
+1.8 –2.7 +4.0
+2.5
+3.4 –4.3 +2.5 +4.3
15.75 - 19.69 –0.8
+3.3 +1.8 a Pairs of values shown represent maximum amount of interference (–) and maximum amount of clearance (+) resulting from application of standard tolerance limits. All data above heavy lines are in accord with American-British-Canadian (ABC) agreements. Symbols H7, js6, etc., are hole and shaft designations in the ABC system. 0 0 –1.2 +2.3 0 +0.2 +3.8 0 0 +1.8 +0.7 0
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