Celestron EdgeHD 8" OTA secondary mirror collimation screws screw size
Celestron EdgeHD 8" OTA secondary mirror collimation screws uses M3 screws. Details, length ranges and sources below.
Official Celestron reference lists M3 x 0.5, 12mm collimation screws for the 8" EdgeHD tube.
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Replacement screws for Celestron EdgeHD 8" 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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