ISMS (Sweden) ISMS scope mount rings and interface screws (Torx T20) screw size
ISMS (Sweden) ISMS scope mount rings and interface screws (Torx T20) uses M4 screws. Details, length ranges and sources below.
Rare metric exception; most rail and optic hardware is imperial #4-48/#6-40/#8-32
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
Replacement screws for ISMS (Sweden) ISMS scope mount rings and interface screws (Torx T20)
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- Buy on AmazonKits and single sizes, with reviews naming real devices
- Buy on eBayOEM screw sets and repair-parts sellers
- M4 screw assortment kitBoxed kit with several lengths — the cheapest way to cover one thread size
- M4 socket cap screwsISO 4762 / DIN 912 hex-drive, the engineering default
- M4 low profile / button headFor clearance-limited repairs and thin covers
- M4 standoffs & spacersPCB and board-mount hardware in the same thread
- M4 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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