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TS-Optics Vixen-style Dovetail Bar (300mm, PS32) screw size

M6 · length not stated in the sources

If you are replacing a screw on TS-Optics Vixen-style Dovetail Bar (300mm, PS32), the thread is M6. None of the sources we found gives an exact length, so measure the original before you order.

Where it is used: dovetail bar for attaching telescope tubes to EQ5-style mounts has countersunk holes drilled/tapped for M6 hex socket screws (alternative to 1/4" screws) for tube ring mounting.

Head and drive, as the source states them: flat / countersunk head and Hex socket (Allen) drive.

This entry is marked confirmed and comes from teleskop-express.de.

M6 means a 6 mm nominal diameter with a 1 mm thread pitch. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.

TS-Optics Vixen-style Dovetail Bar (300mm, PS32) 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
M6not stated1 mmFlat / countersunkHex socket (Allen)Dovetail bar for attaching telescope tubes to EQ5-style mounts has countersunk holes drilled/tapped for M6 hex socket screws (alternative to 1/4" screws) for tube ring mountingConfirmed

Fitment records and sources

M6not specifiedconfirmed

Dovetail bar for attaching telescope tubes to EQ5-style mounts has countersunk holes drilled/tapped for M6 hex socket screws (alternative to 1/4" screws) for tube ring mounting

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

How to check the screw before you buy

  1. For a wall or arm mount, the screw has to engage the threaded insert by several turns but must not bottom out, so measure the insert depth and add the thickness of the bracket and any spacers.
  2. 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.
  3. 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.
  4. Length: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
  5. Driver: the source names a Hex socket (Allen) drive. For comparison, standard M6 heads take PH3 (Phillips) or T30 (Torx), or a 5 mm hex key.
  6. 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

  • TS-Optics Losmandy-style dovetail bars drill through-holes sized to accept either M6 metric screws or 1/4" imperial screws interchangeably in the same countersunk holes.
  • Astro dovetail hardware is inconsistent: Losmandy-brand dovetail plate screws are 1/4-20 (imperial) per Losmandy/Astro-Physics documentation, while PrimaLuceLab's PLUS-standard dovetails explicitly use M6 — don't assume metric across all 'Losmandy-style' dovetail ecosystems.

Pitch gauge · Screw size finder · Torque guide

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The same screw also fits

Devices whose records share a thread with TS-Optics Vixen-style Dovetail Bar (300mm, PS32), closest length match first.

Questions about TS-Optics Vixen-style Dovetail Bar (300mm, PS32) screws

What size screw does TS-Optics Vixen-style Dovetail Bar (300mm, PS32) use?
M6 for dovetail bar for attaching telescope tubes to EQ5-style mounts has countersunk holes drilled/tapped for M6 hex socket screws (alternative to 1/4" screws) for tube ring mounting.
How long are the screws in TS-Optics Vixen-style Dovetail Bar (300mm, PS32)?
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 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 TS-Optics Vixen-style Dovetail Bar (300mm, PS32)?
The source lists a Hex socket (Allen) drive. Standard M6 heads otherwise take PH3 (Phillips) or T30 (Torx), or 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.