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NCR ATM self-locking serrated nut screw size

M4 · length not stated in the sources

Our records put NCR ATM self-locking serrated nut on M4 screws. None of the sources we found gives an exact length, so measure the original before you order.

Where it is used: OEM listing: 'NCR Self Locking Serrated Nut M4' part 009-0007087, used on NCR ATM chassis.

This entry is marked confirmed and comes from atm-machineparts.com.

An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.

NCR ATM self-locking serrated nut 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.

ThreadLengthPitchHeadDriveWhere it goesStatus
M4not stated0.7 mmnot statednot statedOEM listing: 'NCR Self Locking Serrated Nut M4' part 009-0007087, used on NCR ATM chassisConfirmed

Fitment records and sources

M4M4 (nut)confirmed — NCR OEM part 009-0007087

OEM listing: 'NCR Self Locking Serrated Nut M4' part 009-0007087, used on NCR ATM chassis

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

How to check the screw before you buy

  1. Check whether the mount uses a VESA pattern or a vendor bracket before buying screws.
  2. 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.
  3. 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.
  4. Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
  5. 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.
  6. 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.
  • Most HVAC chassis hardware in US-market units is imperial; metric shows up mainly on European-made components.

Pitch gauge · Screw size finder · Torque guide

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The same screw also fits

Devices whose records share a thread with NCR ATM self-locking serrated nut, closest length match first.

Questions about NCR ATM self-locking serrated nut screws

What size screw does NCR ATM self-locking serrated nut use?
M4 for OEM listing: 'NCR Self Locking Serrated Nut M4' part 009-0007087, used on NCR ATM chassis.
How long are the screws in NCR ATM self-locking serrated nut?
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 ATM self-locking serrated nut?
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.