Agilent (HP) 8453 UV-Visible Spectroscopy System screw size
M4 · 8 mm long
Our records put Agilent (HP) 8453 UV-Visible Spectroscopy System on M4 screws, 8 mm long.
It is listed for service manual explicitly calls out 'Screw M4 x 8 mm' as a removal/replacement part in the disassembly procedure.
This entry is marked confirmed and comes from mmrc.caltech.edu.
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.
Agilent (HP) 8453 UV-Visible Spectroscopy System 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 explicitly calls out 'Screw M4 x 8 mm' as a removal/replacement part in the disassembly procedure | Confirmed |
Fitment records and sources
Service manual explicitly calls out 'Screw M4 x 8 mm' as a removal/replacement part in the disassembly procedure
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- If several screws hold the same part, check that they are all the same length before assuming they are.
- 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
- Ideal Scope Mounting System manuals disagree between revisions (M4 vs M5 clamping screws) - check your own manual.
- goBILDA is metric M4; the older Actobotics/ServoCity system it resembles is imperial 6-32. The parts look alike and will strip each other.
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Browse all 31 in Standards & References →The same screw also fits
Devices whose records share a thread with Agilent (HP) 8453 UV-Visible Spectroscopy System, closest length match first.
- DIN 965 / ISO 7046 countersunk Phillips screw also M4 × 8 mm
- DIN 912 socket-head cap screw also M4 × 8 mm
- ASUS VG32AQA1A also M4 × 8 mm
- DIN rail clips and enclosure brackets also M4 × 8 mm
- Philips IntelliVue display mounting bracket also M4 × 8 mm
- Martin MAC 2000 Performance also M4 × 8 mm
- PC case thumbscrews also M4 × 8 mm
- LG 32LM6400 also M4 × 8 mm
Questions about Agilent (HP) 8453 UV-Visible Spectroscopy System screws
- What size screw does Agilent (HP) 8453 UV-Visible Spectroscopy System use?
- M4 × 8 mm for service manual explicitly calls out 'Screw M4 x 8 mm' as a removal/replacement part in the disassembly procedure.
- How long are the screws in Agilent (HP) 8453 UV-Visible Spectroscopy System?
- 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 Agilent (HP) 8453 UV-Visible Spectroscopy System?
- 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.