Molex 4U Specification Grade Fiber Enclosure screw size
M4 · length not stated in the sources
If you are replacing a screw on Molex 4U Specification Grade Fiber Enclosure, the thread is M4. None of the sources we found gives an exact length, so measure the original before you order.
The record covers M4 screws for rack mounting ears and cassette securing hardware in 4U fiber enclosure.
This entry is marked reported and comes from molexces.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.
Molex 4U Specification Grade Fiber Enclosure 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 | M4 screws for rack mounting ears and cassette securing hardware in 4U fiber enclosure | Reported |
Fitment records and sources
M4 screws for rack mounting ears and cassette securing hardware in 4U fiber enclosure
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/earth-stud screws on hazardous-area (ATEX/IECEx) gas detectors are commonly M4 even though the enclosure body uses larger threaded glands — don't extrapolate the earth screw size to the whole unit.
- Some rackmount KVM switch kits pair M4x10 bracket-to-rack screws with M3.2x4.5 bracket-to-chassis screws (non-standard M3.2, not a true M3), so kits are not fully interchangeable with generic M3/M4 hardware.
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Devices whose records share a thread with Molex 4U Specification Grade Fiber Enclosure, closest length match first.
- Bopla enclosure earthing screw also M4
- Solplanet Solar inverter wall-bracket side fixing screws also M4
- Fluke RPM4 rack mount kit (P/N 401929) also M4
- SICK sensingCam SEC200/400 bracket kit also M4
- Gaggia Grinder MDF55 (commercial coffee grinder) also M4
- Hammond 1555JL (part SC576-50) Stainless steel enclosure lid/cover screws also M4
- AutomationDirect DPM-BKT1 panel meter bracket also M4
- MikroTik MTAD-5G-30D3-PA parabolic dish also M4
Questions about Molex 4U Specification Grade Fiber Enclosure screws
- What size screw does Molex 4U Specification Grade Fiber Enclosure use?
- M4 for M4 screws for rack mounting ears and cassette securing hardware in 4U fiber enclosure.
- How long are the screws in Molex 4U Specification Grade Fiber Enclosure?
- 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 Molex 4U Specification Grade Fiber Enclosure?
- 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.