Accuracy International AICS chassis stockside securing screws screw size
M3 · length not stated in the sources
The screws used on Accuracy International AICS chassis stockside securing screws are M3. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: fix-It Sticks compiled torque spec sheet explicitly lists 'M3 & M3 Stockside Securing Screws: 7 in-lbs' for AT/AX AICS rifle chassis, an adjacent precision-mounting product line.
This entry is marked confirmed and comes from media.mwstatic.com.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Accuracy International AICS chassis stockside securing screws screw specifications
One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Torque | Where it goes | Status |
|---|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | 7 in-lbs | Fix-It Sticks compiled torque spec sheet explicitly lists 'M3 & M3 Stockside Securing Screws: 7 in-lbs' for AT/AX AICS rifle chassis, an adjacent precision-mounting product line | Confirmed |
Fitment records and sources
Fix-It Sticks compiled torque spec sheet explicitly lists 'M3 & M3 Stockside Securing Screws: 7 in-lbs' for AT/AX AICS rifle chassis, an adjacent precision-mounting product line
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- For a wall or arm mount, the screw has to engage the threaded insert by several turns but must not bottom out, so measure the insert depth and add the thickness of the bracket and any spacers.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
Common mix-ups with M3
- Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
- Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
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Questions about Accuracy International AICS chassis stockside securing screws screws
- What size screw does Accuracy International AICS chassis stockside securing screws use?
- M3 for fix-It Sticks compiled torque spec sheet explicitly lists 'M3 & M3 Stockside Securing Screws: 7 in-lbs' for AT/AX AICS rifle chassis, an adjacent precision-mounting product line.
- How long are the screws in Accuracy International AICS chassis stockside securing screws?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Accuracy International AICS chassis stockside securing screws?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.
- How tight should the M3 screw on Accuracy International AICS chassis stockside securing screws be?
- The source gives 7 in-lbs for fix-It Sticks compiled torque spec sheet explicitly lists 'M3 & M3 Stockside Securing Screws: 7 in-lbs' for AT/AX AICS rifle chassis, an adjacent precision-mounting product line.