Fluke RPM4 rack mount kit (P/N 401929) screw size
M4 · 12 mm long
Our records put Fluke RPM4 rack mount kit (P/N 401929) on M4 screws, 12 mm long.
Where it is used: M4 x 12 socket-head cap screws with M4 nuts and split lock washers to rack the instrument.
Head and drive, as the source states them: socket cap head.
This entry is marked confirmed and comes from media.fluke.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.
Fluke RPM4 rack mount kit (P/N 401929) 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 | 12 mm | 0.7 mm | Socket cap | not stated | M4 x 12 socket-head cap screws with M4 nuts and split lock washers to rack the instrumentwasher / flange face | Confirmed |
Fitment records and sources
M4 x 12 socket-head cap screws with M4 nuts and split lock washers to rack the instrument
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- 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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 12 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
- 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.
- Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Fluke RPM4 rack mount kit (P/N 401929), closest length match first.
- Rack PDU ears also M4 × 12 mm
- MikroTik MTAD-5G-30D3-PA parabolic dish also M4 × 12 mm
- DIN 41612 backplane / rack card retention also M4 × 12 mm
- Crowcon Xgard Bright fixed gas detector (mining/oil & gas field electronics) also M4 × 12 mm
- Refrigerator door handle also M4 × 12 mm
- DIN rail clips and enclosure brackets also M4 × 12 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M4 × 12 mm
- Tektronix RM5 rackmount kit (5/6 Series MSO) also M4 × 12 mm
Questions about Fluke RPM4 rack mount kit (P/N 401929) screws
- What size screw does Fluke RPM4 rack mount kit (P/N 401929) use?
- M4 × 12 mm for M4 x 12 socket-head cap screws with M4 nuts and split lock washers to rack the instrument.
- How long are the screws in Fluke RPM4 rack mount kit (P/N 401929)?
- The record gives 12 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 Fluke RPM4 rack mount kit (P/N 401929)?
- 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.