How long are the screws in Weidmuller WDU 70/95 and WDU 120/150 terminal blocks?

The record gives 16 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

What is the thread pitch of an M6 screw?

1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.

What screwdriver do I need for Weidmuller WDU 70/95 and WDU 120/150 terminal blocks?

The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.

Can I use an imperial screw instead of M6?

No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.

Weidmuller WDU 70/95 and WDU 120/150 terminal blocks screw size

M6 · 16 mm long

Our records put Weidmuller WDU 70/95 and WDU 120/150 terminal blocks on M6 screws, 16 mm long.

The record covers direct panel mounting without DIN rail: "Fix with screw M6x16".

This entry is marked confirmed and comes from pes-group.co.uk.

An M6 screw is 6 mm in diameter with a 1 mm pitch, tapped with a 5 mm drill; imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.

Weidmuller WDU 70/95 and WDU 120/150 terminal blocks 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
M6	16 mm	1 mm	not stated	not stated	Direct panel mounting without DIN rail: "Fix with screw M6x16"	Confirmed

Fitment records and sources

M616 mmconfirmed

Direct panel mounting without DIN rail: "Fix with screw M6x16"

pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30

Source

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 M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 1 mm from one thread crest to the next (10 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 16 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 M6 heads take PH3 for Phillips and T30 for Torx, and a 5 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 M6 is about 7-10 N·m into metal threads and 2.5-4.0 N·m into plastic bosses; snug it up and stop.

Common mix-ups with M6

Rack hole threads vary: 10-32 and 12-24 are still common in US racks alongside M6 - check the rail before buying.
UR cobot flange bolts are commonly sold/quoted as 'M6 bolts' but the required length depends on the tool thickness; UR's own guidance is bolt class M6-8.8 to ISO4762 without a fixed length, so length must be selected per adapter/tool stack-up, not assumed as a fixed mm value.

Pitch gauge · Screw size finder · Torque guide

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.

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The same screw also fits

Devices whose records share a thread with Weidmuller WDU 70/95 and WDU 120/150 terminal blocks, closest length match first.

cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M6 × 16 mm
Weidmueller ZB 35 busbar terminal blocks / DIN-rail busbar system also M6 × 16 mm
RF Elements Twin Horn antenna bracket also M6 × 16 mm
FJD 3D Excavator Guidance System (GNSS/IMU hardware) also M6 × 16 mm
Tektronix RM5 rackmount kit (5/6 Series MSO) also M6 × 16 mm
Electrolux Professional compact rack-type dishwasher also M6 × 16 mm
19-inch rack cage nut (metric square-hole rails) also M6 × 16 mm
Power wheelchair drive motor mounts also M6 × 16 mm

Questions about Weidmuller WDU 70/95 and WDU 120/150 terminal blocks screws

What size screw does Weidmuller WDU 70/95 and WDU 120/150 terminal blocks use?: M6 × 16 mm for direct panel mounting without DIN rail: "Fix with screw M6x16".
How long are the screws in Weidmuller WDU 70/95 and WDU 120/150 terminal blocks?: The record gives 16 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
What is the thread pitch of an M6 screw?: 1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
What screwdriver do I need for Weidmuller WDU 70/95 and WDU 120/150 terminal blocks?: The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
Can I use an imperial screw instead of M6?: No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.

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