The Huck BobTail® Fastener System- Metric Series

Engineered for the highest level of performance and reliability.

Dimensional and grip data for large diameter metric sizes are below. Click here for BobTail- Inch.

Installed values and tooling information can be found in the attached brochures.

Download: Small Diameter BobTail- Brochure          Download: Large Diameter BobTail- Brochure


Large Diameter Dimensions- Metric

A= Diameter / B= Head Dimension / C= Head Height


Flanged Head
Diameter (A) B C
12mm 12.0 max 24.1 - 25.4 8.9 - 9.6
14mm 14.0 max 30.0 max 11.5 max
16 mm 16.0 max 32.3 - 33.8 11.4 - 12.2
20mm 20.0 max 40.3 - 42.4 15.0 - 16.0

Grip Table

D= Shank / E= Length under Head

Grip
Grip
Range
12mm 14mm 16mm 20mm
D D E
10 5-15 3.8 34.2 3.8 37.1 3.8 40.1 3.8 45.9
15 10-20 3.8 39.2 3.8 42.1 3.8 45.1 3.8 50.9
20 15-25 3.8 44.2 3.8 47.1 3.8 50.1 3.8 55.1
25 20-30 3.8 49.2 3.8 52.1 3.8 55.1 3.8 60.9
30 25-35 3.8 54.2 3.8 57.1 3.8 60.1 3.8 65.9
35 30-40 3.8 59.2 3.8 62.1 3.8 65.1 3.8 70.9
40 35-45 3.8 64.2 3.8 67.1 3.8 70.1 3.8 75.9
45 40-50 3.8 69.2 3.8 72.1 3.8 75.1 3.8 80.9
50 45-55 3.8 74.2 3.8 77.1 9.5 80.1 3.8 85.9
55 50-60 3.8 79.2 3.8 82.1 9.5 85.1 3.8 90.9
60 55-65 3.8 84.2 3.8 87.1 9.5 90.1 3.8 95.9
65 60-70 3.8 89.2 3.8 92.1 9.5 95.1 9.5 100.9
70 65-75 3.8 94.2 3.8 97.1 9.5 100.1 9.5 105.9
75 70-80 3.8 99.2 9.5 102.1 9.5 105.1 9.5 110.9
80 75-85 9.5 104.2 9.5 107.1 9.5 110.1 9.5 115.9
85 80-90 -- -- -- -- 9.5 115.1 -- --
90 85-95 -- -- -- -- 9.5 120.1 -- --
95 90-100 -- -- -- -- 9.5 125.1 -- --
100 95-105 -- -- -- -- 9.5 130.1 -- --
105 100-110 -- -- -- -- 9.5 135.1 -- --
110 105-115 -- -- -- -- 9.5 140.1 -- --
115 110-120 -- -- -- -- 9.5 145.1 -- --
120 115-125 -- -- -- -- 9.5 150.1 -- --

Collar Dimensions

F= Flange Diameter / G= Height / H= Outside Diameter / J = Inside Diameter

Diameter F G H
J
12mm (10.9) 24.4 - 25.4 17.3 - 17.7 18.3 - 18.5 12.1 - 12.3
14mm (8.8) 28.2 - 29.6 20.5 - 21.0 20.9 - 21.1 14.0 - 14.3
14mm (10.9) 28.2 - 29.6 20.5 - 21.0 21.1 - 21.5 14.0 - 14.4
16mm (10.9) 32.3 - 33.8 23.1 - 23.7 24.1 - 24.5 16.0 - 16.4
20mm (10.9 40.3 - 42.1 29.0 - 29.6 30.2 - 30.6 20.1 - 20.5