Celestron C5 Schmidt-Cassegrain OTA secondary mirror collimation screws screw size
Celestron C5 Schmidt-Cassegrain OTA secondary mirror collimation screws uses M3 screws. Details, length ranges and sources below.
Celestron's official knowledge base lists collimation screw thread as M3 x 0.5, 10mm, for the C5 optical tube.
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Replacement screws for Celestron C5 Schmidt-Cassegrain OTA secondary mirror collimation screws
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- Buy on AmazonKits and single sizes, with reviews naming real devices
- Buy on eBayOEM screw sets and repair-parts sellers
- M3 screw assortment kitBoxed kit with several lengths — the cheapest way to cover one thread size
- M3 socket cap screwsISO 4762 / DIN 912 hex-drive, the engineering default
- M3 low profile / button headFor clearance-limited repairs and thin covers
- M3 standoffs & spacersPCB and board-mount hardware in the same thread
- M3 tap & drillFor cutting or chasing a damaged thread
- Precision driver setSmall threads need a properly fitting bit or you cam out and round the head
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