Banner Engineering PVA sensors (SMBPVA6 bracket) screw size
M4 · length not stated in the sources
The screws used on Banner Engineering PVA sensors (SMBPVA6 bracket) are M4. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: "PVA sensors mount to the brackets using the M4 hardware supplied with the sensors".
This entry is marked confirmed and comes from info.bannerengineering.com.
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.
Banner Engineering PVA sensors (SMBPVA6 bracket) 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 | not stated | 0.7 mm | not stated | not stated | "PVA sensors mount to the brackets using the M4 hardware supplied with the sensors" | Confirmed |
Fitment records and sources
"PVA sensors mount to the brackets using the M4 hardware supplied with the sensors"
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.
- 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-lug screws on Siemens and Beckhoff gear (M4) are earth hardware, not structural mounting screws — don't reuse them to hold a module.
- Not all telescope/finder hardware is metric — Celestron Edge/NexStar SE finder-shoe and dovetail screws are reported as 8/32 (imperial UNC), so metric M4/M5 fitments cannot be assumed across all Celestron products; must check per accessory/vintage.
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Devices whose records share a thread with Banner Engineering PVA sensors (SMBPVA6 bracket), closest length match first.
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- Hammond 1557 series polycarbonate/ABS watertight enclosure lid screws also M4
- Elo self-service kiosk peripheral mount also M4
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- Vertical trolley 48V 280Ah battery enclosure also M4
Questions about Banner Engineering PVA sensors (SMBPVA6 bracket) screws
- What size screw does Banner Engineering PVA sensors (SMBPVA6 bracket) use?
- M4 for "PVA sensors mount to the brackets using the M4 hardware supplied with the sensors".
- How long are the screws in Banner Engineering PVA sensors (SMBPVA6 bracket)?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Banner Engineering PVA sensors (SMBPVA6 bracket)?
- 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.