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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
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Description
OZRC M4 Hex Countersunk Head Screw Kit Carbon Bolt Nut Set 5mm-20mm 340pcs v2This professional M4 hex countersunk screw kit is designed for serious RC builders, racers, and workshop use. Manufactured from high strength 10. 9 grade carbon steel with a black oxide finish, this expanded kit provides a wider range of commonly used sizes with higher quantities for frequent maintenance, upgrades, and full vehicle builds. The countersunk flat head design ensures a clean flush fit for professional results. Features Professional grade
This professional M4 hex countersunk screw kit is designed for serious RC builders, racers, and workshop use. Manufactured from high-strength 10.9 grade carbon steel with a black oxide finish, this expanded kit provides a wider range of commonly used sizes with higher quantities for frequent maintenance, upgrades, and full vehicle builds. The countersunk flat head design ensures a clean flush fit for professional results.
Features
- Professional grade assortment designed for RC builders and workshop use
- Manufactured from 10.9 grade carbon steel for exceptional strength and durability
- Black oxide finish offers mild corrosion resistance in dry environments
- Countersunk flat head design allows flush mounting in countersunk holes
- Hex socket drive provides secure installation and reduced stripping
- Expanded size range with higher quantities of commonly used fasteners
- Ideal for RC car assembly repairs upgrades and performance builds
- Organised storage case keeps fasteners sorted and easy to access
Specifications
- Brand: OZRC
- Screw Type: Hex socket countersunk flat head
- Thread Size: M4
- Material: Carbon steel
- Strength Grade: 10.9
- Finish: Black oxide
- Total Quantity: 350 pieces
Includes
- M4 x 5mm screws 30pcs
- M4 x 6mm screws 30pcs
- M4 x 8mm screws 30pcs
- M4 x 10mm screws 20pcs
- M4 x 12mm screws 20pcs
- M4 x 16mm screws 20pcs
- M4 x 20mm screws 20pcs
- M4 hex nuts 170pcs
- 2.5mm hex key 2pcs
Important Notes
- Screw length is measured from the top of the head
- Black oxide finish provides mild corrosion resistance and is best suited for dry environments
- Designed primarily for RC vehicles but suitable for other hobby mechanical and workshop applications
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
#1 Tire Repair
Size: 16 oz
This stuff is Fantastic. I have a riding lawn mower and one of the front tires, which is small, had been running low for a couple of years, we took it off. to fill it with the liquiTube and you could see cracks all around the outside of the tire. The liquid tube oozed out of one of the cracks and sealed , immediately. My brother rolled the tire around real good before we put it back on the track lawn mower. It has been 3 days now and today I mowed for 1 1/2 hrs and the tire as full as it was the day we put in the LiquiTube. This stuff is fantastic, it really, really works!
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Reviewed in the United States on May 31, 2026
★★★★★ 4
Awesome
Size: 32 oz
Works as advertised. Just don't scrimp... give it the full recommended amount in each tire
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Reviewed in the United States on May 27, 2026
★★★★★ 5
This tire sealant works very well
Size: 16 oz
So far so good.
Cheaper and easier that tubing a leaking tire
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Reviewed in the United States on May 24, 2026
★★★★★ 3
Hard to install as instructed.
Size: 32 oz
Nearly impossible to get it in the tire through the valve. Yes I removed the valve core.
Broke the bead on the tire and dumped it in. That worked great! So far no leaks.
They should definitely redesign the installation method.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Been using it for 15 years! Not sure where the Neg reviews come from?
Size: 16 oz
I've been using Liquitube since around 2010. I use it religiously in my ATVs and lawn tractor tires. Since I've been using this stuff, I've never had a flat before. I've pulled out nails and slivers of steel out of my ATV tires but yet none of them lose air or go flat.
I think some of the negative reviews come from improper use of the product or not enough of the product is being used in the tires. I think this come from variance in formula charts that Liquitube has had in the past on their bottles and on their website. The chart on their website wouldn't match the formula that was provided on the bottle. So I think alot of people get mixed up and not knowing the correct amount to add to each tire. Now Liquitube just puts pictures on the side of the bottle with an ounce measurement below each picture to tell people how to use it. But even that can be confusing. For instance, take the picture of the ATV that they show. Below the ATV it says 32oz. Now some people probably think the 32oz is for the entire ATV. Well that isn't the case. They want you to use 32oz Per Tire! Years ago Liquitube even used to say on the bottle to use 32oz per tire on an ATV. Now they just show a picture with an amount below it.
Now you'll come to find out that the 32oz they recommend doesn't match up to the formula they tell you to use to calculate how much each tire is supposed to get. So if you use the formula provided, you come to find that it calculates out to use less product per tire than what the bottle tells you to use. So that's very confusing as well.
So if you use it long enough, you'll be able to know how much each tire will need from experience. Just make sure there's enough on the inside of the tire to coat the entire inside as well as leaving a bit left over to circulate in the tire so it can be ready for a large puncture if that ever happens.
All in all, it's a good product that does what it claims. It lasts for as long as the tire does and it doesn't freeze up in the cold either! 5 stars!
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Reviewed in the United States on February 13, 2026