KERN ABS/ABJ analytical balance screw size
M4 · 8 mm long
If you are replacing a screw on KERN ABS/ABJ analytical balance, the thread is M4, 8 mm long.
The record covers service manual instructs 'Remove two screws (Semus M4 x 8) and remove the inner case'.
This entry is marked confirmed and comes from frankshospitalworkshop.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.
KERN ABS/ABJ analytical balance 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 | Service manual instructs 'Remove two screws (Semus M4 x 8) and remove the inner case' | Confirmed |
Fitment records and sources
Service manual instructs 'Remove two screws (Semus M4 x 8) and remove the inner case'
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- 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
- 'Semus' in the Kern manual is a brand/head-style qualifier on the screw, not a separate thread designation — the metric callout is still plainly M4.
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
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Devices whose records share a thread with KERN ABS/ABJ analytical balance, closest length match first.
- Solar module frame grounding lug also M4 × 8 mm
- Cabinet & furniture hardware also M4 × 8 mm
- Ikan PT3100 15-inch teleprompter also M4 × 8 mm
- Eschmann LS5 / SES2555 autoclave also M4 × 8 mm
- Microwave housing and control panel also M4 × 8 mm
- Celestron collimation screws, C8/C9.25/C11 SCT optical tubes also M4 × 8 mm
- Mid-size drone frames also M4 × 8 mm
- DIN 912 socket-head cap screw also M4 × 8 mm
Questions about KERN ABS/ABJ analytical balance screws
- What size screw does KERN ABS/ABJ analytical balance use?
- M4 × 8 mm for service manual instructs 'Remove two screws (Semus M4 x 8) and remove the inner case'.
- How long are the screws in KERN ABS/ABJ analytical balance?
- 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 KERN ABS/ABJ analytical balance?
- 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.