Are these screws recommended for outdoor use?

I sure hope so since that is where I have been using them. They show no sign of rust or wear and they have seen a full range of seasons.

What is the diameter of the head?

its not .305... my mistake. The head of screw is about 7/16"

Could these screws be used to put up vinyl siding?

I would use them just do not tighten down

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Description

🔧 Screw it right, screw it tight — the pro’s choice for flawless finishes!

UNMATCHED DURABILITY - Carbon steel core with black phosphate finish resists rust & corrosion indoors or out.
BULK PACK CONVENIENCE - 100 screws per pack means you’re always ready to tackle your next project without delay.
VERSATILE APPLICATION - Perfect for wood and thin metal (18-22 gauge) projects — cabinets, hardware, and more.
EFFORTLESS INSTALLATION - Sharp Type A point and deep threads glide smoothly, reducing wood splitting and saving time.
PRECISION FIT EVERY TIME - Phillips modified truss head ensures a flush, professional finish without surface damage.

This pack of 100 #8 x 1" black Phillips modified truss head wood screws combines carbon steel strength with a corrosion-resistant black phosphate coating. Designed for both wood and thin metal fastening, their sharp point and deep threads enable quick, secure installation while delivering a sleek, flush finish ideal for professional-grade woodworking and hardware projects.

Specifications

Material	Carbon Steel
Head Style	Truss
Exterior Finish	Black Phosphate,Metal,Steel
Thread Size	#8
Point Style	Type A Point
Metal Type	Carbon Steel
Brand	BCP Fasteners
Colour	black
Head Type	Truss
Thread Type	Deep Thread With Very Sharp Point
Thread Coverage	Fully Threaded
Fastener Type	Wood Screws
Set Screw Thread Type	Deep Thread
Thread Style	Right Hand
Thread Class	3B
Fastener Size	#8 x 1 inch
Size	1 inches
Number of Pieces	100
Manufacturer	small parts
Country of Origin	USA
Model number	BCP1079
Number of Memory Sticks	100
Special Feature	easy to install
Specific Product Use	wood
Item Weight	190 g
Item model number	BCP1079
Are batteries included?	No

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