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🔩 Secure your build with strength and style — don’t get left behind!
The LLB 300mm M10 coach screws are half-threaded, zinc-plated lag bolts with a 17mm hex head, designed for heavy-duty wood and concrete fastening. Each pack contains 6 durable screws engineered for superior grip, corrosion resistance, and easy installation, making them ideal for professional-grade wooden construction and sleeper projects.
| ASIN | B0CDPR1FJC |
| Best Sellers Rank | 52,412 in DIY & Tools ( See Top 100 in DIY & Tools ) 25 in Lag Bolts |
| Brand Name | LLB |
| Colour | Silver |
| Compatible Groove Diameter | 4 Millimeters |
| Country Of Origin | Poland |
| Customer Reviews | 4.4 out of 5 stars 95 Reviews |
| Drive System | Internal Hex |
| Exterior Finish | Zinc |
| Exterior finish | Zinc |
| Fastener Size | 4mm x 300mm |
| Fastener Type | Wood Screws |
| Head Type | Hex |
| Head style | Hex |
| Item Diameter | 4 Millimetres |
| Item Dimensions | 30 x 1 x 1.7 centimetres |
| Item dimensions L x W x H | 30 x 1 x 1.7 centimetres |
| Item height | 17 millimetres |
| Manufacturer | LLB |
| Material | Zinc |
| Material Type | Zinc |
| Metal | Zinc |
| Metal type | Zinc |
| Number of Pieces | 6 |
| Screw Head Style | Hex |
| Set Screw Thread Type | UNC |
| Size | 4mm x 300mm / 0.4" x 12" |
| Thread Coverage | Partially Threaded |
| Thread Size | M10 |
| Thread Style | Right Hand |
| Thread size | M10 |
| Unit Count | 1.0 Count |
P**S
Quality product
I bought these to screw down through an old railway sleeper as I was standing. My drive quality was good. Very strong. Great value for money and easy to use
S**N
Product as described and value for money
Perfect for what was wanted. Was functional and enabled the chunk of wood to be removed as described. Good quality and value for money.
R**R
Constitution heavy duty screws
They are ok bend under pressure
J**R
Totally fit for purpose.
Perfect for joining sleepers together ,excellent quality.
H**S
Need a good drill for to screw them in
Did what I wanted it for
A**W
String and reliable. No need to drill pilot hole if using them for sleepers
Long and very strong
G**R
Raised garden sleeper bed.
Pilot hole required on raised garden sleeper bed . Do not over tighten.
M**H
Great Quality
Used to help pull out in old fence post so put a great deal of force on them without issue. Great quality, recommended.
Trustpilot
1 week ago
2 days ago