Ottobock 17AD1 multifunctional ankle joint screw screw size
M4 · 30 mm long
The screws used on Ottobock 17AD1 multifunctional ankle joint screw are M4, 30 mm long.
The record covers M4x30 fastener in joint assembly instructions.
This entry is marked confirmed and comes from manualspro.net.
For reference, M4 is 4 mm across the threads at 0.7 mm pitch. The imperial size people confuse it with: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Ottobock 17AD1 multifunctional ankle joint screw 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 | 30 mm | 0.7 mm | not stated | not stated | M4x30 fastener in joint assembly instructions | Confirmed |
Fitment records and sources
M4x30 fastener in joint assembly instructions
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- For medical and lab equipment, use the manufacturer's replacement part where one is specified; the thread size here helps identify it, not certify it.
- 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 30 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
- US-made pinball machines (Williams/Bally/Stern) overwhelmingly use imperial UTS threads (#6-32, #8-32, #10-32); explicit metric threads only appear on newer/import components such as Jersey Jack Pinball's Hobbit Smaug assembly (M3).
- Dashcam mounts advertised as '1/4" M4 screw joint' have two different threads: the 1/4"-20 camera thread and a separate M4 grub screw for the ball joint — don't order the wrong one.
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Devices whose records share a thread with Ottobock 17AD1 multifunctional ankle joint screw, closest length match first.
- Atdec Telehook TH-2250-VF display wall mount also M4 × 30 mm
- Panasonic TC-L42D30 also M4 × 30 mm
- Kolm Engines EZ77V4 model aircraft engine also M4 × 30 mm
- Philips IntelliVue MP80/MP90 monitor also M4 × 30 mm
- Henny Penny pressure fryer / combi oven also M4 × 30 mm
- Heated bed leveling screws also M4 × 30 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M4 × 30 mm
- Makita 1806B planer also M4 × 30 mm
Questions about Ottobock 17AD1 multifunctional ankle joint screw screws
- What size screw does Ottobock 17AD1 multifunctional ankle joint screw use?
- M4 × 30 mm for M4x30 fastener in joint assembly instructions.
- How long are the screws in Ottobock 17AD1 multifunctional ankle joint screw?
- The record gives 30 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 Ottobock 17AD1 multifunctional ankle joint screw?
- 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.