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Machine Dowel Pins Chart ANSI ASME

ANSI ASME Hardware Guide

American National Standard Hardened Ground Machine Dowel Pins Chart per. ANSI ASME B18.8.2

ANSI ground machine dowel pins (hardened) are furnished in two diameter series: Standard Series having basic diameters 0.0002 inch over the nominal diameter, intended for initial installations; and Oversize Series having basic diameters 0.001 inch over the nominal diameter, intended for replacement use.

All dimension are in inches

Nominal Size Nominal Pin Diameter	Pin Diameter, A						Point Diameter, B		Crown Height, C	Crown Radius, R
	Standard Series Pins			Oversize Series Pins
	Basic	Max	Min	Basic	Max	Min	Max	Min	Max	Min
1⁄16 0.0625	0.0627	0.0628	0.0626	0.0635	0.0636	0.0634	0.058	0.048	0.020	0.008
5⁄64 0.0781	0.0783	0.0784	0.0782	0.0791	0.0792	0.0790	0.074	0.064	0.026	0.010
3⁄32 0.0938	0.0940	0.0941	0.0939	0.0948	0.0949	0.0947	0.089	0.079	0.031	0.012
1⁄8 0.1250	0.1252	0.1253	0.1251	0.1260	0.1261	0.1259	0.120	0.110	0.041	0.016
5⁄32 0.1562	0.1564	0.1565	0.1563	0.1572	0.1573	0.1571	0.150	0.140	0.052	0.020
3⁄16 0.1875	0.1877	0.1878	0.1876	0.1885	0.1886	0.1884	0.180	0.170	0.062	0.023
1⁄4 0.2500	0.2502	0.2503	0.2501	0.2510	0.2511	0.2509	0.240	0.230	0.083	0.031
5⁄16 0.3125	0.3127	0.3128	0.3126	0.3135	0.3136	0.3134	0.302	0.290	0.104	0.039
3⁄8 0.3750	0.3752	0.3753	0.3751	0.3760	0.3761	0.3759	0.365	0.350	0.125	0.047
7⁄16 0.4375	0.4377	0.4378	0.4376	0.4385	0.4386	0.4384	0.424	0.409	0.146	0.055
1⁄2 0.5000	0.5002	0.5003	0.5001	0.5010	0.5011	0.5009	0.486	0.471	0.167	0.063
5⁄8 0.6250	0.6252	0.6253	0.6251	0.6260	0.6261	0.6259	0.611	0.595	0.208	0.078
3⁄4 0.7500	0.7502	0.7503	0.7501	0.7510	0.7511	0.7509	0.735	0.715	0.250	0.094
7⁄8 0.8750	0.8752	0.8753	0.8751	0.8760	0.8761	0.8759	0.860	0.840	0.293	0.109
1 1.0000	1.0002	1.0003	1.0001	1.0010	1.0011	1.0009	0.980	0.960	0.333	0.125

 

Nominal Size Nominal Pin Diameter	Single Shear Load, for Carbon or Alloy Steel, Calculated, lb	Suggested Hole Diameter
		Max	Min
1⁄16 0.0625	400	0.0625	0.0620
5⁄64 0.0781	620	0.0781	0.0776
3⁄32 0.0938	900	0.0937	0.0932
1⁄8 0.1250	1,600	0.1250	0.1245
5⁄32 0.1562	2,500	0.1562	0.1557
3⁄16 0.1875	3,600	0.1875	0.1870
1⁄4 0.2500	6,400	0.2500	0.2495
5⁄16 0.3125	10,000	0.3125	0.3120
3⁄8 0.3750	14,350	0.3750	0.3745
7⁄16 0.4375	19,550	0.4375	0.4370
1⁄2 0.5000	25,500	0.5000	0.4995
5⁄8 0.6250	39,900	0.6250	0.6245
3⁄4 0.7500	57,000	0.7500	0.7495
7⁄8 0.8750	78,000	0.8750	0.8745
1 1.0000	102,000	1.0000	0.9995

 

All dimensions are in inches.
Click on image to enlarge

a Nonpreferred sizes, not recommended for use in new designs

b Lengths increase in 1/16-inch steps up to 3/8 inch, in 1/8-inch steps from 3/8 inch to 1 inch, in 1/4-inch steps from 1 inch to 2 1/2 inches, and in 1/2-inch steps above 2 1/2 inches. Tolerance on length is ± 0.010 inch.

c These press hole sizes have been commonly used for press fitting Standard Series machine dowel pins into materials such as mild steels and cast iron. In other materials, such as aluminum or zinc die castings, hole size limits are usually decreased by 0.0005 inch to increase the interfearance of the press fit.

Related:

• Dowel Pin Slip and Press Fit Installation Tolerance Chart
• Dowel Pin Shear Load Stress Equations and Calculator
• ISO Metric Dowel Pins per DIN EN ISO 8734
• Aircraft Stud, Lock Ring, Dowel Pin, Bolt, Nut Reference Guide Table #6
• Design for Dowel Pin Press Fit
• Bolt or Pin In Single Shear Equation and Calculator
• Bolt Single and Double Shear and Tension Stress Analysis Calculator per AISC 9th Edition
• Bolt or Pin In Double Shear Equation and Calculator

Reference:

American National Standard Hardened Ground Machine Dowel Pins ANSI/ASME B18.8.2