ISMS scope mount (Ideal Scope Mounting System) screw size
ISMS scope mount (Ideal Scope Mounting System) uses M4 / M5 screws. Details, length ranges and sources below.
Ring and interface clamping screws
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
Main clamping screws for scope mount base
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
Replacement screws for ISMS scope mount (Ideal Scope Mounting System)
Affiliate links — they cost you nothing extra and keep this database free.
- 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
More in Sports, Outdoors & Optics Mounts
Accuracy International AT/AX AICS chassisAlpine binding heel/toe piece (heavy duty)Archery/bow accessory set screws (generic component, not confirmed as sight-specific)Bodypoint wheelchair T-slot mounting kitBurton EST bindings on The ChannelBurton Re:Flex snowboard bindings (4x4 / 3D boards)Elliptical pedal arm boltsFishing reel handle and drag knobFishing reel handle screw/nut locking plateFishing reel side platesFuge EVOLVE ski binding mounting jigHeart rate chest strap buckle
Browse all 30 in Sports, Outdoors & Optics Mounts →Slug: isms-scope-mount-ideal-scope-mounting-system