How long are the screws in NCR SelfServ ATM family currency cassette/module mounting hardware?

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 NCR SelfServ ATM family currency cassette/module mounting hardware?

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.

NCR SelfServ ATM family currency cassette/module mounting hardware screw size

M4 · length not stated in the sources

The screws used on NCR SelfServ ATM family currency cassette/module mounting hardware are M4. None of the sources we found gives an exact length, so measure the original before you order.

The record covers NCR SelfServ 25/23/27 ATM Service and Parts Identification manuals list M4 machine screws for securing internal cassette guide rails and module brackets within the safe/dispenser unit.

This entry is marked likely and comes from scribd.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.

NCR SelfServ ATM family currency cassette/module mounting hardware 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	NCR SelfServ 25/23/27 ATM Service and Parts Identification manuals list M4 machine screws for securing internal cassette guide rails and module brackets within the safe/dispenser unit	Likely

Fitment records and sources

M4M4 (length per specific bracket, not itemized in excerpt)likely

NCR SelfServ 25/23/27 ATM Service and Parts Identification manuals list M4 machine screws for securing internal cassette guide rails and module brackets within the safe/dispenser unit

pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20

Source

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

Water heater elements use pipe threads (NPSM/NPT), not metric machine screws.
Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.

Pitch gauge · Screw size finder · Torque guide

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The same screw also fits

Devices whose records share a thread with NCR SelfServ ATM family currency cassette/module mounting hardware, closest length match first.

Questions about NCR SelfServ ATM family currency cassette/module mounting hardware screws

What size screw does NCR SelfServ ATM family currency cassette/module mounting hardware use?: M4 for NCR SelfServ 25/23/27 ATM Service and Parts Identification manuals list M4 machine screws for securing internal cassette guide rails and module brackets within the safe/dispenser unit.
How long are the screws in NCR SelfServ ATM family currency cassette/module mounting hardware?: 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 NCR SelfServ ATM family currency cassette/module mounting hardware?: 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.

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