Kurt J. Lesker DN16CF reducing flange RF275X133M screw size
M4 · length not stated in the sources
Kurt J. Lesker DN16CF reducing flange RF275X133M takes M4 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for conFlat UHV reducing flange with M4 x 0.7 tapped holes.
This entry is marked confirmed and comes from lesker.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.
Kurt J. Lesker DN16CF reducing flange RF275X133M 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 | ConFlat UHV reducing flange with M4 x 0.7 tapped holeswasher / flange face | Confirmed |
Fitment records and sources
ConFlat UHV reducing flange with M4 x 0.7 tapped holes
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Keep material and finish the same as the original (often stainless) on equipment that is cleaned or sterilised.
- 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
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
More in Medical & Laboratory
The same screw also fits
Devices whose records share a thread with Kurt J. Lesker DN16CF reducing flange RF275X133M, closest length match first.
- Agilent 8453 UV-Visible spectrophotometer also M4
- Waters Xevo / Acquity instrument panel screw also M4
- Agilent 1100 LC/MSD mass spectrometer also M4
- Ottobock 17AD1 multifunctional ankle joint screw also M4
- SISAB ECO.50+/T laboratory centrifuge also M4
- Thorlabs Fixed Mirror Mounts (post-mountable) also M4
- Blind-tapped DN16CF ConFlat vacuum flange (metric) also M4
- Medfusion 3500 syringe infusion pump also M4
Questions about Kurt J. Lesker DN16CF reducing flange RF275X133M screws
- What size screw does Kurt J. Lesker DN16CF reducing flange RF275X133M use?
- M4 for conFlat UHV reducing flange with M4 x 0.7 tapped holes.
- How long are the screws in Kurt J. Lesker DN16CF reducing flange RF275X133M?
- 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 Kurt J. Lesker DN16CF reducing flange RF275X133M?
- 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.