Eberspacher D4WS / D5WSC hydronic heater screw size
M5 · 12 mm long
If you are replacing a screw on Eberspacher D4WS / D5WSC hydronic heater, the thread is M5, 12 mm long.
The record covers combustion air blower motor screw M5 x 12 mm.
This entry is marked confirmed and comes from krueger.co.uk.
M5 means a 5 mm nominal diameter with a 0.8 mm thread pitch. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
Eberspacher D4WS / D5WSC hydronic heater 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 |
|---|---|---|---|---|---|---|
| M5 | 12 mm | 0.8 mm | not stated | not stated | Combustion air blower motor screw M5 x 12 mm | Confirmed |
Fitment records and sources
Combustion air blower motor screw M5 x 12 mm
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Appliance panels often use self-tapping screws into sheet metal or plastic, and machine screws into nuts or inserts — keep each type where it came from.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 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 12 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 M5 heads take PH2 for Phillips and T25 for Torx, and a 4 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 M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- Some scooters and appliances use self-tapping screws of similar diameter rather than true M5 machine threads.
- M5 is not a VESA size — it shows up in bikes, furniture and appliances, rarely on displays.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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Devices whose records share a thread with Eberspacher D4WS / D5WSC hydronic heater, closest length match first.
- Dishwasher toe kick panel also M5 × 12 mm
- Rancilio/Bezzera/Faema/Elektra/Pavoni espresso machine shower screen screw also M5 × 12 mm
- Vulcan-Hart Chef combi oven also M5 × 12 mm
- Dryer door handle also M5 × 12 mm
- Furnace / AC control board mounts also M5 × 12 mm
- Martin MAC 500 pan/tilt motors also M5 × 12 mm
- FJD 3D Excavator Guidance System (GNSS/IMU hardware) also M5 × 12 mm
- Kick scooter clamp and folding hardware also M5 × 12 mm
Questions about Eberspacher D4WS / D5WSC hydronic heater screws
- What size screw does Eberspacher D4WS / D5WSC hydronic heater use?
- M5 × 12 mm for combustion air blower motor screw M5 x 12 mm.
- How long are the screws in Eberspacher D4WS / D5WSC hydronic heater?
- The record gives 12 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for Eberspacher D4WS / D5WSC hydronic heater?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.