Toshiba 50LF621U21 screw size
M5 / M6 · 17 to 35 mm long
If you are replacing a screw on Toshiba 50LF621U21, the thread is M5 and M6 in lengths from 17 to 35 mm.
There are 2 separate fitment records for it, including stand (M5) and vesa mount (M6).
2 of the 2 records are marked confirmed, drawn from 1 source (files.bbystatic.com).
M5 means a 5 mm nominal diameter with a 0.8 mm thread pitch. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
Toshiba 50LF621U21 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 |
|---|---|---|---|---|---|---|
| M5 | 17 mm | 0.8 mm | not stated | not stated | Stand | Confirmed |
| M6 | 35 mm | 1 mm | not stated | not stated | Vesa mount | Confirmed |
Fitment records and sources
Stand
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
Vesa mount
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- 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.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). This device also uses M6, so measure each screw rather than assuming they match.
- Pitch: 0.8 mm from one thread crest to the next (12.5 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 records span 17–35 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 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 M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5 / M6
- The 'GoPro thread' is M5-0.8, a de facto standard on third-party mounts, and is not the imperial 1/4-20 tripod thread.
- M5 is not a VESA size — it shows up in bikes, furniture and appliances, rarely on displays.
- VESA displays over 50kg move up to M8 x 1.25, which is outside metric M6 hardware - don't force an M6 bolt into a heavy-panel mount.
- VESA display mounts are M4, M6 or M8 depending on the pattern size; measure before ordering.
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Devices whose records share a thread with Toshiba 50LF621U21, closest length match first.
- Bullet CCTV camera housing also M5 × 17 mm
- Universal full-motion TV mount kits also M6 × 35 mm
- Atdec Telehook TH-2250-VF display wall mount also M5 × 17 mm
- Speaker flying frame / eyebolt hardware also M6 × 35 mm
- Track lighting heads also M5 × 17 mm
- Toshiba 32LF221U21 also M5 × 17 mm
- Signage standoffs also M6 × 35 mm
- Raymarine Axiom 7/9/12 multifunction display also M5 × 17 mm
Questions about Toshiba 50LF621U21 screws
- What size screw does Toshiba 50LF621U21 use?
- M5 × 17 mm for stand; M6 × 35 mm for vesa mount.
- How long are the screws in Toshiba 50LF621U21?
- The records range from 17 to 35 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for Toshiba 50LF621U21?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.