System of Measurement
    System of Measurement
    Inch
    Metric
    Number of Mounting Holes
    Number of Mounting Holes
    1
    2
    3
    4
    5
    6
    7
    8
    10
    12
    14
    16
    17
    19
    20
    25
    28
    29
    Height
    Height
    1/4"
    17/64"
    0.35"
    3/8"
    3/8"-1/2"
    27/64"
    7/16"
    0.48"
    1/2"
    1/2"-11/16"
    0.56"
    9/16"
    37/64"
    0.61"
    5/8"
    11/16"
    11/16"-15/16"
    45/64"
    0.73"
    3/4"
    3/4"-1 5/8"
    49/64"
    25/32"
    0.81"
    13/16"
    55/64"
    7/8"
    15/16"
    15/16"-1 5/16"
    0.98"
    63/64"
    1"
    1 1/64"
    1.06"
    1 1/16"
    1 1/8"
    1 1/8"-2 1/2"
    1 3/16"
    1 13/64"
    1 1/4"
    1 9/32"
    1 5/16"
    1 5/16"-1 3/4"
    1 23/64"
    1 3/8"
    1 7/16"
    1 7/16"-1 3/4"
    1.48"
    1 1/2"
    1 33/64"
    1 9/16"
    1 5/8"
    1 43/64"
    1 11/16"
    1 3/4"
    1 3/4"-2 1/4"
    1 3/4"-4"
    1 3/4"-9 1/2"
    1 25/32"
    1 51/64"
    1 13/16"
    1 55/64"
    1 7/8"
    1 15/16"
    2"
    2 1/32"
    2 1/8"
    2 1/4"
    2 3/8"
    2 7/16"
    2 15/32"
    2 1/2"
    2 1/2"-5"
    2 1/2"-6"
    2 5/8"
    2 3/4"
    2 7/8"
    3"
    3"-9 3/4"
    3"-29 1/2"
    3"-30"
    3 1/8"
    3 1/4"
    3 5/16"
    3 3/8"
    3 7/16"
    3 1/2"
    3 1/2"-9"
    3 1/2"-13"
    3 5/8"
    4"
    4"-19 1/2"
    4 1/8"
    4 1/4"
    4 1/2"
    4 3/4"
    4 7/8"-10 1/2"
    5"
    5"-21"
    5"-28"
    5"-30"
    5 1/4"
    5 1/2"
    5 13/16"
    6"
    6"-28"
    6"-31 1/2"
    6"-42"
    6 1/2"
    6 1/2"-42 1/2"
    6 3/4"
    7"
    7"-32"
    7 5/8"
    8"
    8"-32"
    8"-43 1/2"
    8"-44"
    8 1/2"-28 1/2"
    8 1/2"-33 1/2"
    8 1/2"-38 1/2"
    9"
    9"-42 1/2"
    9"-48"
    9 1/2"-27 1/2"
    9 1/2"-31 1/2"
    9 1/2"-33"
    9 1/2"-45"
    9 1/2"-54"
    10"
    10"-33"
    10 1/2"-30 1/2"
    11"-58"
    11 1/4"
    11 1/2"
    11 1/2"-41 1/2"
    12"
    12"-36 1/2"
    12"-40"
    12"-45 1/2"
    14"-49 1/2"
    14 1/2"
    16"
    16 1/2"
    24"-36"
    24"-42"
    25"-37"
    27"-45"
    28 1/2"-46"
    30"-48"
    30 1/2"-47 1/2"
    31"-74"
    32"-42"
    33 1/2"-70"
    34"-52"
    36"
    36"-5 ft.
    37"-59"
    42"-65"
    5 mm
    6 mm
    6.9mm
    7 mm
    8 mm
    9 mm
    9.7mm
    10 mm
    11 mm
    12 mm
    13 mm
    14 mm
    14.5mm
    15 mm
    16 mm
    16.5mm
    17 mm
    18 mm
    19 mm
    20 mm
    21mm
    22 mm
    22.2mm
    23mm
    24 mm
    25 mm
    25.5mm
    25.9mm
    29.5mm
    33 mm
    36mm
    50mm
    75mm