Compare Model Drawings, CAD & Specs Type Height Thread Type Availability Price
SR-0.063-S
$14
In Stock
 SR-0.063-S Post Spacer 1.6 mm 1/4-20 (M6) CLR
In Stock
 $14
SR-0.125-S
$15.10
In Stock
 SR-0.125-S Post Spacer 3.2 mm 1/4-20 (M6) CLR
In Stock
 $15.10
SR-0.25-S
$16.90
In Stock
 SR-0.25-S Post Spacer 6.35 mm 1/4-20 (M6) CLR
In Stock
 $16.90
SR-0.50-S
$18.20
In Stock
 SR-0.50-S Post Spacer 12.7 mm 1/4-20 (M6) CLR
In Stock
 $18.20
SR-1E
$29
In Stock
 SR-1E Extension Post 25.4 mm 1/4-20
In Stock
 $29
SR-2E
$34
2 Weeks
 SR-2E Extension Post 50.8 mm 1/4-20
2 Weeks
 $34
SR-3E
$41
In Stock
 SR-3E Extension Post 76.2 mm 1/4-20
In Stock
 $41
SR-4P
$72
In Stock
 SR-4P Grooved Extension Post 101.6 mm 1/4-20
In Stock
 $72
M-SR-1E
$29
In Stock
 M-SR-1E Extension Post 25.4 mm M6
In Stock
 $29
M-SR-2E
$34
In Stock
 M-SR-2E Extension Post 50.8 mm M6
In Stock
 $34
M-SR-3E
$41
In Stock
 M-SR-3E Extension Post 76.2 mm M6
In Stock
 $41
M-SR-4P
$72
In Stock
 M-SR-4P Grooved Extension Post 101.6 mm M6
In Stock
 $72

Features

Extension Posts and Spacers for Customizable Heights

Threaded extension posts and spacers allow mounting certain optics at non-standard heights. These stainless steel constructed extension posts and spacers provide a wide variety of options for building posts to mount optical components at customizable heights. 

Specially Designed Groove and Peg Extension Post

SR-4P is a special purpose extension post for use with the SR-SC sliding clamp. It features a "V" groove along the axial length of the rod to support the sliding SR-SC clamp and its spring-loaded linear motion. This prevents undesired rotation during alignment, and with Newport’s patented peg fastener, two SR-4P can be aligned as a composite system.