Brass
Includes clear window (plastic)
10/Pack

This size will fit in a 1/8" (3.2mm) hole.

Dimensions:
R=5/32" (4mm)
r=1/16" (2.2mm)
d=0.5mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit in a 5/32" (4mm) hole.

This size is available with or without the bolt holes around the flange, you can choose the version you want from the dropdown menu. With will provide the porthole in the image. Without is the same thing just without the miniature holes around the flange. $5.00 discount for the version without the holes.

Dimensions:
R= 1/4" (6mm)
r= 1/16" (2.4mm)
d= .8mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit a 1/4" (5.8mm) hole.

Dimensions:
R= 5/16" (8mm)
r= 3/16" (4.1mm)
d= .8mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit in a 1/4" (6.4mm) hole.

Dimensions:
R=3/8" (10mm)
r=7/32" (5.5mm)
d=0.9mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit in a 11/32" (8.8mm) hole.

Dimensions:
R=15/32" (12mm)
r=3/8" (9.2mm)
d=0.9mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit a 3/8" (9.6mm) hole.

Dimensions:
R= 9/16" (14mm)
r= 1/4" (7.6mm)
d= 1mm

Brass
Includes clear window (plastic)
10/Pack

This size will fit a 5/8" (15.7mm) hole.

Dimensions:
R=13/16" (20mm)
r=1/2" (12.7mm)
d=1.5mm

12" with 12 Bolts
2/Pack

Diameter: 3/4" OD x 1/2" ID

14" with 12 Bolts
2/Pack

Diameter: 15/16" OD x 9/16" ID

16" with 12 Bolts
2/Pack

Dimensions: 1" O.D.
3/4" I.D.

20" with 12 Bolts
2/Pack

Diameter: 1-1/4" O.D.
15/16" I.D.

16" Porthole with 12 bolts
2/Pack

Diameter: 11/16" O.D. x 1/2" I.D.

10" porthole with 12 Bolts
2/Pack

Diameter: 1/2" O.D. x 5/16" I.D.

12" porthole with 12 Bolts
2/Pack

Diameter: 9/16" O.D. x 3/8" I.D.

Nickel metal
10/Pack

Dimensions:
Width: 11/16" (18mm)
Height: 1/4" (6mm)
Depth: 1/4" (5.6mm)

Nickel metal
10/Pack

Dimensions:
Width: 1" (24mm)
Height: 3/8" (9.7mm)
Depth: 1/4" (6.6mm)

Copper Metal


Length: 5/16" (8mm)
Diameter: 1/32" (.8mm)