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METRIC FASTENERS DIMENSIONAL DATA
DIMENSIONS OF METRIC DOWEL PINS
 Holo-Krome Dowel Pins    Holo-Krome Metric Dowel Pins
HOLO-KROME
DOWEL
PINS

NOMINAL
SIZE
OR BASIC
SCREW
DIAMETER		 A B C R L1

PIN DIAMETER

POINT DIAMETER CROWN HEIGHT CROWN RADIUS NOMINAL
MAX. MIN. MAX. MIN. MAX. MIN. MIN.
1.5 1.508 1.503 1.4 1.2 0.6 0.2 3.5
2 2.008 2.003 1.9 1.7 0.6 0.2 3.5
2.5 2.508 2.503 2.4 2.2 0.7 0.3 4.0
3 3.008 3.003 2.9 2.6 0.8 0.3 4.0
 
4 4.008 4.003 3.9 3.6 0.9 0.4 4.5
5 5.008 5.003 4.9 4.6 1.0 0.4 4.5
6 6.009 6.003 5.8 5.4 1.1 0.4 4.5
8 8.009 8.003 7.8 7.4 1.3 0.5 5.5
 
10 10.009 10.003 9.8 9.4 1.4 0.6 6.0
12 12.009 12.003 11.8 11.4 1.6 0.6 6.0
16 16.009 16.003 15.8 15.3 1.8 0.8 7.0
20 20.009 20.003 19.8 19.3 2.0 0.8 7.0
25 25.009 25.003 24.8 24.3 2.3 1.0 7.5

 
NOTES
  1. POINT LENGTH. The point length is decreased and the point angle increased on short dowel pins. The minimum nominal length listed in table is shortest length to accommodate standard end configurations.
  2. EFFECTIVE LENGTH. The effective length (that portion of the pin between the start of the point angle and the radius point of the crown) on short dowel pins shall not be less then 75 percent of the overall length of the pin. For short pins, it may be necessary to deviate from the specified dimensions by reducing the crown radius or height, and increasing the point angle, or both.
  3. STRAIGHTNESS. Dowel pins shall be straight over the effective length within an accumulative total of 0.013mm per 25mm of length for nominal lengths up to and including 100, and within 0.05mm total for all nominal lengths above 100.
  4. END CONTOURS. The ends of hardened ground dowel pins shall be essentially perpendicular to the axis of pin. One end of the pin shall be pointed and the other end crowned to the dimensions specified. On the pointed end, the edge formed by the surface of point and the end pin may be slightly rounded or broken. the center of the pointed end may be flat or concave. See Figure 1. The crowned end shall be essentially flat to convex.
  5. POINT CONCENTRICITY. The diameter of the point may be eccentric with the pin diameter to an extent such that the minimum length of point on the pin is no less then 0.1mm. See Figure 1.
    Holo-Krome Dowel Pins

  6. Applicable Standards and Specifications ASME B18.8.5M.


Warning: Always press dowel pins into place using an arbor press. Never strike with any material or tool, including a hammer. Doing so may cause the dowel to splinter and may result in serious bodily injury.

Caution: Information is for general reference only.
For more complete specifications consult the standards referenced, or contact us.