TCL Q77K Wall Mount Size Guide: VESA Patterns, Screw Sizes & Mounts

Did you just bring home a new TCL Q77K? Now the big question shows up. Which wall mount fits your TV?

Picking the wrong mount wastes time and money. It can also put your new screen at risk. This guide gives you the VESA pattern, weight and screw size for every Q77K model.

You will also find the mounts we like best, setup tips, and answers to common questions. Read on, and you can mount your TV safely in one afternoon.

In a Nutshell

• VESA sizes change with screen size. The 50 and 55 inch Q77K use 300 x 300 mm. The 65 inch uses 400 x 300 mm. The 85 inch uses 600 x 300 mm. The 98 inch uses 600 x 500 mm.
• The Q77K uses M6 metric screws. Most universal mount kits include M6 screws. Check the screw length in your user manual before you tighten anything.
• Weight goes from about 20 lb to 112 lb. The 50 inch model weighs 19.6 lb without its stand. The 98 inch model weighs about 112 lb. Pick a mount rated well above your TV’s weight.
• The 75 inch model needs a quick check. Costco lists 300 x 300 mm. Some spec sites list 400 x 300 mm. Measure the holes on your own TV to be sure.
• A 42 to 90 inch full motion mount fits most sizes. Models like the Mounting Dream MD2617, SANUS VLF728 and ECHOGEAR EGLF2 cover the 50 to 85 inch Q77K.
• Always mount into wood studs or solid masonry. Drywall alone cannot hold a large TV safely.

TCL Q77K VESA Sizes at a Glance

VESA is a standard for the holes on the back of your TV. The numbers show how far apart those holes sit, in millimeters. The first number is the width. The second number is the height.

Here are the Q77K numbers from Costco’s official product listings:

Model	VESA Pattern	Weight Without Stand	Size Without Stand (W x H x D)
50Q77K	300 x 300 mm	19.6 lb	43.7 x 25.4 x 2.7 in
55Q77K	300 x 300 mm	24.3 lb	48.2 x 27.9 x 2.7 in
65Q77K	400 x 300 mm	37.5 lb	56.9 x 32.7 x 2.7 in
75Q77K	300 x 300 mm (some sources say 400 x 300)	52.9 lb	65.6 x 37.7 x 2.7 in
85Q77K	600 x 300 mm	66.8 lb	74.4 x 42.8 x 2.5 in
98Q77K	600 x 500 mm	111.99 lb	98 inch class

Keep this table handy while you shop. Most mount listings show a VESA range, such as 200 x 100 mm to 600 x 400 mm. Your TV’s pattern must fall inside that range.

The 75 inch model is the tricky one. Costco lists it at 300 x 300 mm. Spec sites such as DisplayInput list 400 x 300 mm. Grab a tape measure and check the distance between the holes yourself.

Good news here. Most large universal mounts fit both 300 x 300 and 400 x 300. So this small mismatch rarely causes a real problem.

Why the Right Mount Size Matters for Your Q77K

A wall mount does three jobs. It holds the weight. It lines up with the holes. It puts the screen at a good viewing angle. If it fails at any one of these, you have a problem.

A mount with a low weight rating can bend over time. A slow sag might not show up for months. Then one day the TV tilts forward or the bracket cracks. Buy a mount rated well above your TV’s weight.

Hole spacing matters just as much. If the mount arms cannot reach your TV’s holes, you cannot attach the TV. Adapters exist, but they add weight and leverage. It is better to buy a mount that fits from the start.

Screen size ratings also count. Makers test mounts with certain screen widths in mind. A 42 to 90 inch mount suits the 85 inch Q77K. A 26 to 55 inch mount does not suit a 65 inch screen, even if the holes line up.

The Q77K is a good value TV. It offers a 144Hz native refresh rate, Dolby Vision, HDR10+ and Google TV. You want a mount that shows off that picture, not one that wobbles.

Last, think about your room. A bright room may need tilt to cut glare. A corner setup may need swivel. Your mount type affects how much you enjoy every movie night.

Mounting Dream MD2617 Full Motion Mount for TCL Q77K

Last update on 2026-10-01 / Affiliate links / Images from Amazon Product Advertising API

The Mounting Dream MD2617 is our top pick for most Q77K owners. It fits TVs from 42 to 90 inches. It supports VESA patterns up to 600 x 400 mm.

That range covers the 50, 55, 65, 75 and 85 inch Q77K. The 85 inch model, at 600 x 300 mm, fits right at the edge of the width range. The 98 inch model needs a bigger mount.

This is a full motion mount. You can pull the TV out, swivel it left or right, and tilt it. That helps in open living rooms where people watch from different spots.

The weight rating sits well above the heaviest Q77K it fits. The 85 inch model weighs 66.8 lb, so you get a big safety margin. That extra margin helps the arm stay level over the years.

Installation is simple for a two person team. The kit includes M6 screws, spacers and wall bolts. Always use the spacers if the back of your TV is uneven.

Pros

• Fits 42 to 90 inch TVs, so it covers five Q77K sizes.
• Supports VESA up to 600 x 400 mm, which includes all Q77K patterns except the 98 inch model.
• Full motion arms let you swivel, tilt and extend the screen.
• High weight capacity gives a large safety margin.
• Comes with a full hardware kit, including M6 screws.

Cons

• Does not fit the 98 inch Q77K.
• The arm is heavy, so you need two people to install it.
• Full motion mounts sit farther from the wall than fixed mounts.
• Needs two wood studs for a safe install.

Top 3 Alternative for Mounting Dream MD2617

Maybe you want a different brand, a longer arm, or a slimmer look. Here are three strong options. Each one fits most Q77K sizes.

Last update on 2026-10-01 / Affiliate links / Images from Amazon Product Advertising API

The SANUS VLF728 Advanced Full Motion Mount fits 42 to 90 inch TVs up to 125 lb. It extends up to 28 inches from the wall. SANUS calls its smooth arm design FluidMotion. It suits corner setups and large rooms.

Last update on 2026-10-01 / Affiliate links / Images from Amazon Product Advertising API

The ECHOGEAR MaxMotion EGLF2 fits 42 to 90 inch TVs up to 125 lb. It supports VESA from 200 x 100 mm to 600 x 400 mm. You can pull the TV out 22 inches from the wall. It also offers 130 degrees of swivel.

Last update on 2026-10-01 / Affiliate links / Images from Amazon Product Advertising API

The Pipishell Tilt Mount fits 37 to 82 inch TVs up to 132 lb. It supports VESA from 200 x 100 mm to 600 x 400 mm. It tilts down 8 degrees to cut glare. It sits close to the wall for a clean look.

Quick tip: The Pipishell tilt mount tops out at 82 inches. So it suits the 50, 55, 65 and 75 inch Q77K, but not the 85 inch.

Pros

• All three cover the most popular Q77K sizes.
• SANUS and ECHOGEAR offer long arms for flexible viewing.
• Pipishell gives a slim profile at a low price.
• Each one has a strong weight rating with room to spare.

Cons

• None of the three fit the 98 inch Q77K.
• Pipishell does not swivel.
• Long arm mounts cost more than tilt mounts.

TCL Q77K Wall Mount Screw Size

Screws cause more mounting headaches than anything else. The TCL Q77K uses M6 metric screws. Replacement screw sets sold for the 65Q77K and 75Q77K confirm the M6 standard.

The “M6” part means the screw is 6 mm wide. The length is the part that needs care. TCL’s own mounting guide lists M6 x 16 mm for many of its TVs. Still, check the user manual for your exact model.

Why does length matter so much? A screw that is too short will not grab enough thread. A screw that is too long can push into the TV and damage parts inside. Never force a screw that stops turning.

Here is a simple test. Thread the screw in by hand first. It should turn smoothly for several full turns. If it stops early, use a spacer or a shorter screw.

Most mount kits include several M6 lengths and spacers. Spacers fill the gap if your TV has a curved or uneven back. They also help you clear cables plugged into the back.

Many owners on Reddit offer a smart trick. Use the stand screws that came with the TV as a guide. Compare them with the screws in your mount kit. You might need slightly longer ones to make up for the bracket thickness.

If your kit lacks the right length, buy a TV screw set with M6 options. They cost little and save a lot of stress.

Match Your Mount to Your Q77K Weight

Weight is the most important safety number. Your mount must hold more than your TV weighs. A safe rule is to pick a mount rated at least 1.5 times your TV weight.

Here is the weight of each Q77K without the stand:

The 50 inch model weighs 19.6 lb. The 55 inch model weighs 24.3 lb. The 65 inch model weighs 37.5 lb.

The 75 inch model weighs 52.9 lb. The 85 inch model weighs 66.8 lb. The 98 inch model weighs 111.99 lb.

For the 50 to 65 inch sizes, almost any medium mount works. These TVs are light for their size. Even a basic tilt mount gives you plenty of safety margin.

The 75 and 85 inch models need more care. Look for a mount rated at 100 lb or more. Full motion arms put extra leverage on the wall when extended. A higher rating keeps things steady.

The 98 inch model is in its own class. At about 112 lb, it needs a heavy duty mount. Look for a rating of 150 lb or more and VESA support of at least 600 x 500 mm. Many installers suggest a fixed or tilt mount for screens this big.

Remember that the wall also holds the weight. A strong mount on weak drywall is still unsafe. We cover wall types later in this guide.

Mount Guide for the 50 and 55 Inch Q77K

The 50 and 55 inch Q77K are the easiest to mount. Both use a 300 x 300 mm VESA pattern. Both weigh under 25 lb.

The 50 inch model measures 43.7 inches wide and 25.4 inches tall. The 55 inch model measures 48.2 inches wide and 27.9 inches tall. Both are only 2.7 inches deep.

You have lots of mount choices here. A mount rated for 32 to 70 inch TVs works well. Just confirm it supports 300 x 300 mm. Some small mounts top out at 200 x 200 mm, which is too narrow.

For bedrooms, a tilt mount is a great match. People often mount bedroom TVs high on the wall. A small downward tilt points the screen at your eyes.

For a small apartment, think about a full motion mount. You can swing the screen into a kitchen or dining space. These light TVs put very little strain on a swing arm.

Your wall may have only one stud in the right spot. Some single stud mounts can hold light TVs. Read the mount instructions and weight limits closely for single stud use.

These sizes are also great for DIY first timers. You can lift the TV with two people without much effort.

Mount Guide for the 65 Inch Q77K

The 65 inch Q77K is the most popular size. It uses a 400 x 300 mm VESA pattern. That means the holes sit 400 mm apart side to side and 300 mm apart top to bottom.

The TV weighs 37.5 lb without the stand. It measures 56.9 inches wide, 32.7 inches tall and 2.7 inches deep.

Many shoppers make one mistake with this size. They buy a mount that lists “up to 400 x 400 mm.” That works fine. But some mounts list 400 x 300 as outside their range. Always check that both numbers fit.

A 37 to 75 inch or 42 to 90 inch mount suits this TV well. The Mounting Dream MD2617, SANUS VLF728 and ECHOGEAR EGLF2 all fit. The Pipishell tilt mount fits too.

The 65 inch screen is wide enough to need two studs. Most homes in the US have studs 16 inches apart. A mount with a wide wall plate lets you hit both studs.

This size also shines in a living room with a full motion arm. You can angle it for game nights. The Q77K supports up to 144Hz at 4K, so gamers love this size.

Two people can lift the 65 inch model easily. Still, have a third person guide the arms into place if you can.

Mount Guide for the 75, 85 and 98 Inch Q77K

The big sizes need the most planning. Each one has its own VESA pattern and weight.

The 75 inch Q77K weighs 52.9 lb. It measures 65.6 inches wide and 37.7 inches tall. Costco lists its VESA as 300 x 300 mm. Some spec sites say 400 x 300 mm. Measure your TV to confirm. A mount that covers 200 x 100 to 600 x 400 mm handles either case.

The 85 inch Q77K weighs 66.8 lb. It measures 74.4 inches wide and 42.8 inches tall. Its VESA pattern is 600 x 300 mm. That wide spacing rules out many medium mounts. Look for at least 600 mm of width support.

The 98 inch Q77K weighs 111.99 lb. Its VESA pattern is 600 x 500 mm. Most 42 to 90 inch mounts cannot reach the top holes. You need a mount made for 100 inch screens, often with VESA up to 800 x 600 mm.

For these sizes, use at least two people. Three people is even better for the 85 and 98 inch models. One person can guide the hooks while two people hold the screen.

Think about your wall space too. The 85 inch model is over six feet wide. Measure the wall before you buy the TV and the mount.

Full Motion vs Tilt vs Fixed Mounts

Mounts come in three main types. Each type suits a different room.

A fixed mount holds the TV flat against the wall. It is the slimmest choice. It costs the least. It works best when you sit straight in front of the screen at eye level.

A tilt mount angles the screen up or down. Most tilt mounts tilt down about 8 to 15 degrees. This cuts glare from lights and windows. It also helps when you mount the TV above eye level.

A full motion mount extends, swivels and tilts. You can point the screen at the couch, the kitchen or a corner chair. It gives you the most freedom, but it sits farther from the wall.

The Q77K has a glossy panel on some sizes. Reviews note that glossy screens reflect more light. A tilt or full motion mount helps you fight glare in bright rooms.

Here is a simple way to choose. If you watch from one spot, pick fixed or tilt. If you watch from many spots, pick full motion.

Cost matters too. Tilt mounts often cost much less than full motion arms. Full motion mounts need more wall strength because of the leverage. Factor that into your plan.

Ideal Mount Height and Viewing Distance

Height affects comfort more than most people think. The center of the screen should sit near your eye level when seated. For most couches, that is about 40 to 45 inches from the floor.

Many people mount TVs too high. A high TV can strain your neck over a long movie. If you must mount high, use a tilt mount to angle the screen down.

Here is a quick way to find the right spot. Sit on your couch. Have a friend mark the wall at your eye level. That mark is a good center point for the screen.

Next, find your bracket height. Measure from the center of the TV to its mounting holes. Then adjust the bracket position so the screen center lands on your mark.

Viewing distance also matters. A common guide is to sit about 1 to 1.5 times the screen size away for 4K TVs. A 65 inch screen works well from about 5.5 to 8 feet. An 85 inch screen works well from about 7 to 10.5 feet.

These numbers are a starting point, not a rule. Some people love a big screen up close for movies. Others like more distance for casual TV.

Above a fireplace? Heat can harm the TV, and the height is usually too high. A pull down mount or a tilt mount helps in this setup.

Wall Types and Stud Spacing

Your wall is part of the mount system. A great mount on a weak wall is still unsafe.

Most US homes have wood studs spaced 16 inches apart. Some have 24 inch spacing. Use a stud finder to locate them. Mark both edges of each stud to find its center.

Always drive lag bolts into the center of the stud. Hitting the edge can split the wood. Pre drill pilot holes with the bit size listed in your mount manual.

Concrete and brick walls are very strong. You need concrete anchors and a masonry bit. Most mount kits include these anchors. Drill slowly and clear the dust from each hole.

Metal studs need special toggle anchors. Standard lag bolts do not grip metal studs. Check the mount maker’s advice before you drill into metal.

Plain drywall cannot hold a TV safely. Some anchors claim to hold heavy loads in drywall. Experts still advise against it for large screens. A falling TV can hurt someone, so do not take the risk.

Plan your cables before you drill. Many people run cables inside the wall using an in wall power kit. Never run a standard power cord inside the wall, as electrical codes often forbid it.

Simple Installation Tips for Your Q77K

You can mount your Q77K in about an hour. Here is a simple process to follow.

First, lay the TV face down on a soft blanket. Use a flat table or the floor. Do not press on the screen. Remove the stand if it is attached.

Next, attach the TV brackets to the back of the TV. Use the M6 screws and spacers from your kit. Thread each screw by hand first. Then tighten with a screwdriver until snug. Do not overtighten.

Now find your studs and mark your height. Hold the wall plate on the wall. Use a level to keep it straight. Mark the holes with a pencil.

Drill pilot holes into the studs. Attach the wall plate with lag bolts. Check the level again before the final tightening.

Then, with a helper, lift the TV and hook the brackets onto the wall plate. Lock the safety screws or latches right away. Many mounts have a safety bolt at the bottom.

Finally, connect your cables. Adjust the tilt and swivel. Most mounts let you fine tune the level after the TV is hanging.

Check your work after a week. Tighten anything that has loosened. A quick check keeps your setup safe for years.

Common Wall Mount Mistakes to Avoid

Learning from others saves you trouble. Here are the mistakes Q77K owners make most often.

The first mistake is skipping the VESA check. People assume all mounts fit all TVs. The 85 inch Q77K, with its 600 x 300 mm pattern, rules out many mid size mounts. Always compare numbers.

The second mistake is using the wrong screws. Some people grab M8 screws because they look stronger. The Q77K needs M6 screws. Wrong screws can strip the threads inside the TV.

The third mistake is mounting into drywall alone. It might hold for a while. Then it fails without warning. Always find the studs.

The fourth mistake is mounting too high. A high TV looks nice in photos but hurts your neck in real life. Aim for eye level or use tilt.

The fifth mistake is forgetting cable access. The Q77K has four HDMI 2.1 ports. Plug in your main cables before you hang the TV, or pick a full motion mount for easy access.

The sixth mistake is working alone. Even the 55 inch model is awkward for one person. Ask a friend to help. It is safer and faster.

FAQs

What VESA size is the TCL Q77K?

It depends on screen size. The 50 and 55 inch models use 300 x 300 mm. The 65 inch uses 400 x 300 mm. The 85 inch uses 600 x 300 mm. The 98 inch uses 600 x 500 mm. Costco lists the 75 inch at 300 x 300 mm, but some sources say 400 x 300 mm.

What screws do I need to wall mount a TCL Q77K?

The Q77K uses M6 metric screws. Check your user manual for the exact length. Many TCL models use M6 x 16 mm, but always test fit by hand first.

Does the TCL Q77K come with wall mount screws?

The TV box usually includes the stand and stand screws, not wall mount screws. Most wall mount kits include M6 screws and spacers.

Can one mount fit every Q77K size?

No. A 42 to 90 inch mount with VESA up to 600 x 400 mm fits the 50 to 85 inch models. The 98 inch model needs a larger, heavy duty mount.

How much does the 85 inch TCL Q77K weigh?

The 85 inch model weighs 66.8 lb without the stand and 68.3 lb with the stand.

Is a full motion mount safe for the 75 inch Q77K?

Yes, if you pick one rated well above 52.9 lb and attach it to two wood studs. Mounts like the SANUS VLF728 and ECHOGEAR EGLF2 suit this size.

How high should I mount my TCL Q77K?

Place the center of the screen near seated eye level, about 40 to 45 inches from the floor. Use a tilt mount if you need to mount higher.

Can I mount a TCL Q77K on drywall without studs?

You should not. Drywall alone cannot safely hold a large TV. Use wood studs, or use the right anchors for concrete or metal studs.