Yale Assure Lock Lever Touchscreen (YRL226) screw size
M4 · 22 mm long
Yale Assure Lock Lever Touchscreen (YRL226) takes M4 metric screws, 22 mm long.
Where it is used: M4 x 22mm pan-head machine screws (x2) securing the interior mounting plate/lock body to the door.
Head and drive, as the source states them: pan head.
This entry is marked confirmed and comes from images.salsify.com.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Yale Assure Lock Lever Touchscreen (YRL226) screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M4 | 22 mm | 0.7 mm | Pan head | not stated | M4 x 22mm pan-head machine screws (x2) securing the interior mounting plate/lock body to the door | Confirmed |
Fitment records and sources
M4 x 22mm pan-head machine screws (x2) securing the interior mounting plate/lock body to the door
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Check the strength class stamped on the head (8.8, 10.9, A2-70) and replace like for like.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: for pan head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 22 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M4 heads take PH2 for Phillips and T20 for Torx, and a 3 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.
- Bopla SHR-Z boss screws and Hammond 1591XXF screws look metric but are self-tapping/imperial — don't substitute a machine screw into those bosses.
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Devices whose records share a thread with Yale Assure Lock Lever Touchscreen (YRL226), closest length match first.
- Pinball cabinet hardware (EU restorations) also M4 × 22 mm
- Makita 6095D cordless driver drill also M4 × 22 mm
- Milwaukee cordless tool (service bulletin 54-26-2590) also M4 × 22 mm
- DIN 912 socket-head cap screw also M4 × 22 mm
- DIN 965 / ISO 7046 countersunk Phillips screw also M4 × 22 mm
- Strike plate and hinges (metric doors) also M4 × 22 mm
- Carbide3D Shapeoko 5 Pro CNC router also M4 × 22 mm
- Christie HS / Jazz Series UST lens bracket also M4 × 22 mm
Questions about Yale Assure Lock Lever Touchscreen (YRL226) screws
- What size screw does Yale Assure Lock Lever Touchscreen (YRL226) use?
- M4 × 22 mm for M4 x 22mm pan-head machine screws (x2) securing the interior mounting plate/lock body to the door.
- How long are the screws in Yale Assure Lock Lever Touchscreen (YRL226)?
- The record gives 22 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Yale Assure Lock Lever Touchscreen (YRL226)?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.