Standard Hole Shapes
Round Holes (R)
R = Hole diameter
Square Holes (C)
C = Length and width of square
Slotted Holes (LR)
L = Length of slot
R = Width of slot
Rectangular Holes (LC)
L = Length of rectangle
C = Width of rectangle
Hexagonal Holes (H)
H = Width of heaxagon measured across two parallel sides
Standard Hole Patterns
Triangular Pitch (T)
T = Distance from hole center to center
Also known as a ‘staggered’ or ’60 degree staggered’ pitch
Rectangular Pitch (U)
U = Distance from hole center to center
Also known as a ‘parallel’ or ‘square’ pitch
Staggered Pitch (Z)
Z = Distance from hole center to center
Diagonal Pitch (M)
M = Distance from hole center to center
Also known as a ‘staggered’ or ’45 degree staggered’ pitch
Perforated Pattern Examples
Round hole staggered pitch
(R-T)

Round hole parallel pitch
(R-U)

Square hole staggered pitch
(C-Z)

Square hole parallel pitch
(C-U)

Slotted hole staggered pitch
(LR-Z)

Slotted hole parallel pitch
(LR-U)

Rectangular hole staggered pitch
(LC-Z)

Rectangular hole parallel pitch
(LC-U)

View all perforated patterns