Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring screw size
M4 · 8 mm long
If you are replacing a screw on Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring, the thread is M4, 8 mm long.
Where it is used: tommy Car Wash Controller Programming/Installation Manual explicitly specifies M4 screw terminals for input/output wiring blocks inside the tunnel controller enclosure.
This entry is marked likely and comes from shop.tommycarwash.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.
Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring 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 | Tommy Car Wash Controller Programming/Installation Manual explicitly specifies M4 screw terminals for input/output wiring blocks inside the tunnel controller enclosure | Likely |
Fitment records and sources
Tommy Car Wash Controller Programming/Installation Manual explicitly specifies M4 screw terminals for input/output wiring blocks inside the tunnel controller enclosure
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- 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
- Grounding/earth-stud screws on hazardous-area (ATEX/IECEx) gas detectors are commonly M4 even though the enclosure body uses larger threaded glands — don't extrapolate the earth screw size to the whole unit.
- JCM bill-acceptor manual warns that if the host cabinet mounting bracket is only 2mm thick, standard-length M4 screws will not seat correctly — screw length must be matched to bracket thickness.
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Devices whose records share a thread with Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring, closest length match first.
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M4 × 8 mm
- Allen & Heath ZED mixer rack ear kit AP7956 also M4 × 8 mm
- Philips IntelliVue FMS mounting bracket also M4 × 8 mm
- DIN rail clips and enclosure brackets also M4 × 8 mm
- Crowcon Xgard Bright fixed gas detector (mining/oil & gas field electronics) also M4 × 8 mm
- Midea/Little Swan front-load washer control board technical service guide also M4 × 8 mm
- DIN 41612 backplane / rack card retention also M4 × 8 mm
- AutomationDirect DPM-BKT1 panel meter bracket also M4 × 8 mm
Questions about Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring screws
- What size screw does Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring use?
- M4 × 8 mm for tommy Car Wash Controller Programming/Installation Manual explicitly specifies M4 screw terminals for input/output wiring blocks inside the tunnel controller enclosure.
- How long are the screws in Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring?
- 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 Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring?
- 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.