What size screw does Newport M-TSP-1 miniature post use?

M2 for M2 tapped hole on one end, M4 on the other; 38.1 mm post; M4 for M4 tapped hole on one end, M2 on the other; 38.1 mm post.

How long are the screws in Newport M-TSP-1 miniature post?

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 M2 screw?

0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.

What screwdriver do I need for Newport M-TSP-1 miniature post?

The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.

Can I use an imperial screw instead of M2?

No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

Newport M-TSP-1 miniature post screw size

M2 / M4 · length not stated in the sources

If you are replacing a screw on Newport M-TSP-1 miniature post, the thread is M2 and M4. None of the sources we found gives an exact length, so measure the original before you order.

There are 2 separate fitment records for it, including M2 tapped hole on one end, M4 on the other; 38.1 mm post (M2) and M4 tapped hole on one end, M2 on the other; 38.1 mm post (M4).

2 of the 2 records are marked confirmed, drawn from 1 source (newport.com).

For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.

Newport M-TSP-1 miniature post 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
M2	not stated	0.4 mm	not stated	not stated	M2 tapped hole on one end, M4 on the other; 38.1 mm post	Confirmed
M4	not stated	0.7 mm	not stated	not stated	M4 tapped hole on one end, M2 on the other; 38.1 mm post	Confirmed

Fitment records and sources

M2tapped holeconfirmed

M2 tapped hole on one end, M4 on the other; 38.1 mm post.

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

Source

M4tapped holeconfirmed

M4 tapped hole on one end, M2 on the other; 38.1 mm post.

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

Source

How to check the screw before you buy

Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M4, so measure each screw rather than assuming they match.
Pitch: 0.4 mm from one thread crest to the next (25 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 M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2 / M4

M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.

Pitch gauge · Screw size finder · Torque guide

More in Cameras & Optics

1.25" eyepiece/diagonal/SCT visual back thumb screw Aimpoint Comp M4 / M4s LRP & TNP mount Aimpoint Micro T-1/T-2/H-1/H-2 standard mount Aimpoint Micro T-1/T-2/H-1/H-2 standard mount screw Aimpoint SM-2001/2007 Micro T1/T2 mount Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)Airsoft/firearm red-dot sight optic mounting screws (Vortex Viper, Swampfox patterns)Alpine and touring ski bindings (Binding Freedom inserts)Arca-style quick-release plate ARRI plate for Sony VENICE 1/2 Artesky 340mm Vixen Dovetail Bar Astromania finder scope dovetail base

Browse all 278 in Cameras & Optics →

The same screw also fits

Devices whose records share a thread with Newport M-TSP-1 miniature post, closest length match first.

Wooden Camera UMB-1 Universal Mattebox (Base/Clamp On/Swing Away/Pro) also M4
Lab microscope adjustment screws also M2
Thorlabs KS05T/M SM05 kinematic mirror mount also M4
Tilta TA-RF-LPL adapter ring support (RED KOMODO cage) also M4
Meade 2" to 1.25" eyepiece adapter / 1.25" visual back also M4
Thorlabs DDR25/M direct drive rotation mount also M4
Thorlabs nested rotation mounts also M4
Underwater camera housing latch and port also M4

Questions about Newport M-TSP-1 miniature post screws

What size screw does Newport M-TSP-1 miniature post use?: M2 for M2 tapped hole on one end, M4 on the other; 38.1 mm post; M4 for M4 tapped hole on one end, M2 on the other; 38.1 mm post.
How long are the screws in Newport M-TSP-1 miniature post?: 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 M2 screw?: 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
What screwdriver do I need for Newport M-TSP-1 miniature post?: The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
Can I use an imperial screw instead of M2?: No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

Heads up: shipping delay