Pinball machine fan screw screw size
M4 · 8 mm long
The screws used on Pinball machine fan screw are M4, 8 mm long.
It is listed for marco Specialties part listed as M4-0.7 x 8 coarse thread.
This entry is marked confirmed and comes from marcospecialties.com.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Pinball machine fan 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 | 8 mm | 0.7 mm | not stated | not stated | Marco Specialties part listed as M4-0.7 x 8 coarse thread | Confirmed |
Fitment records and sources
Marco Specialties part listed as M4-0.7 x 8 coarse thread
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- 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 8 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
- 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.
- Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.
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Devices whose records share a thread with Pinball machine fan screw, closest length match first.
- Tuttnauer manual autoclaves also M4 × 8 mm
- Juki MF-7923 / MF-7523 industrial machine also M4 × 8 mm
- Pinball cabinet hardware (EU restorations) also M4 × 8 mm
- Rhea Vendors Luce Publico vending machine also M4 × 8 mm
- Singer Viking Emerald 203 sewing machine also M4 × 8 mm
- Makita GB801 also M4 × 8 mm
- HP LaserJet family common hardware also M4 × 8 mm
- Fishing reel side plates also M4 × 8 mm
Questions about Pinball machine fan screw screws
- What size screw does Pinball machine fan screw use?
- M4 × 8 mm for marco Specialties part listed as M4-0.7 x 8 coarse thread.
- How long are the screws in Pinball machine fan screw?
- The record gives 8 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 Pinball machine fan 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.