Which screw is harder, M3.5 or M4?M5?

They're both hard, but the M4 and M5 model is harder.

How do I determine if I need to pre-drill holes in my wood?

When your wood is very hard, please pre-drill holes in the boards to prevent them from cracking.

Is this a brass screw?

No,They're made of carbon steel. and yellow zinc plated screws, which are harder than brass screws. But brass screws are more beautiful. Their ability to resist rust is the same.

4x16mm Wood Screws Flat Head Screws For Wood Zinc Galvanized

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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₩27731

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In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

HEAVIER&THICKER：When the quantity and model are the same,Our screws are heavier;zinc coating is thicker.
HIGH CORROSION RESISTANCE:The screws are yellow zinc passivated and to withstand 72 hours salt spray test, never rust is guaranteed.
EASY PIERCE:Fine thead-depth and sharp v thead can achieve quicker insertion.
HIGH STRENGTH:The outdoor screws have high Strength philips head,Perfect match with manual and electric screwdrivers.
VARIOUS PRODUCT USES：High performace for the home and engineering,These flat head screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic.

4x16mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs) : desertcart.co.uk: DIY & Tools Review: Screws - Good screws at good price Review: Great screws - Great screws, cheep price

Specifications

ASIN	B097BS7XQ1
Best Sellers Rank	592 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Screws (DIY & Tools)
Brand Name	TOPYWMSP
Colour	Yellow
Compatible Groove Diameter	4 Millimeters
Country Of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (1,446)
Drive System	PH
Exterior Finish	Zinc
Fastener Size	4x16mm
Fastener Type	Wood Screws
Finish Types	Zinc Plated
Head Type	PH2
Item Dimensions	4 x 4 x 16 millimetres
Manufacturer	Zhengzhou HP Ltd
Manufacturer Part Number	ZZWLSA08078
Material Type	alloy_steel，Carbon Steel， Zinc Passivated
Metal	alloy_steel，Carbon Steel， Zinc Passivated
Number of Pieces	100
Screw Head Style	Cross Flat Head
Screw Point Style	Sharp
Set Screw Thread Type	M
Size	4x16mm
Thread Coverage	Fully Threaded
Thread Size	M4 x 16mm
Thread Style	Right Hand
Thread Type	Metric
Unit Count	100 count

Reviews

S**N

Screws

Good screws at good price

28.04.2026

M**T

Great screws

Great screws, cheep price

5.04.2026

R**N

Great screws

Great value

27.04.2026

U**N

They do what they are intended

Perfect for the job

6.05.2026

U**U

All very good !!

Very well made and appears rust proof.

19.04.2026

P**.

Ideal for 5mm plywood

Ideal for 5mm plywood to cover floorboards

12.05.2026

R**S

Average

Not the best quality, have had a few heads sheer off. Having to pilot the holes to almost the screw size. These are the 3 x 20mm screws. Correct item , promptly supplied.

24.06.2025

A**R

Good quality

Did the job

7.05.2026

R**T

As described

6.05.2026

S**B

Correspondent a ma recherche, le descriptif est exact. Je conseille ce vendeur

4.12.2024

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

₩27731

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

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3 days ago

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4x16mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs)

Details

Details

Description

Specifications

Reviews

Common Questions