1/4-20 to 3/8 Thread Adapter
by Mile High Astronomy
$2.99
1/4" to 3/8" Screw Adapter Made of metal, solid and durable. This reducer screw allows you to convert any 3/8"-16 thread for the insertion of a 1/4"-20 screw. Package contains one (1) thread adapter. This thread adapter can be used for example, to connect the SeeStar S30 or S50 to a standard 1/4-20 tripod screw.