1/4 x 2-1/2 Lag Screw Kit (100 Pack) - Exterior Ceramic Black

In this review the 1/4 x 2-1/2 lag screw kit is evaluated as a bulk solution for exterior and construction projects; the bottom line is that it is a practical, value-oriented kit for contractors and DIYers who need consistent hardware for heavy wood fastening. The pack contains 100 Grade A307 lag screws and 100 USS flat washers with a durable Black Ruspert ceramic coating, and it stands out when corrosion resistance and quantity matter most for jobs like decking, fencing, and mounting hardware.

Key Features

• Complete kit: The kit includes 100 lag screws and 100 USS flat washers so projects can be started without searching for matching hardware.
• Weatherproof coating: Black Ruspert is a four layer ceramic coating that increases rust resistance and is intended for exterior use.
• Construction grade: The lag screws meet ASTM A307 and ASME B18.2.1 standards, giving inspectors and professionals an expected baseline of material strength.
• ACQ compatible: The coating and material are suitable for use in ACQ treated lumber, which is common in outdoor projects.
• Consistent sizing: Each screw is 1/4 in diameter with a 2-1/2 in length and a 7/16 in head width, simplifying planning and predrilling needs.

Who It's For

This kit is best for contractors, handymen, and homeowners tackling multiple exterior fastening tasks where having a large, uniform supply of hardware saves time and trips to the store. It is particularly useful for decking, fencing, mounting brackets, and medium duty structural attachments where lag screws are standard.

Those who need stainless steel corrosion resistance for marine environments or specialized fasteners with custom head profiles should look elsewhere; this kit focuses on economical, coated carbon steel lag screws rather than premium stainless alloys.

Pros & Cons

Pros

• High quantity and matched washers make it convenient for larger jobs and repeat installations.
• Black Ruspert coating provides enhanced rust resistance compared with plain galvanized fasteners.
• Meets common industrial standards, which supports use in professional projects.

Cons

• Some customers report mixed experiences with hold and material quality, so performance can vary with substrate and installation technique.
• Pilot holes are recommended, which adds time to installation compared with self-drilling fasteners.

Specifications

Diameter	1/4 in
Length	2-1/2 in
Head width	7/16 in
Quantity	100 lag screws + 100 USS flat washers (200 pcs total)
Washer OD	47/64 in
Coating	Black Ruspert 4-layer ceramic
Standards	Meets ASTM A307 and ASME B18.2.1

Our Verdict

The 1/4 x 2-1/2 lag screw kit is a solid value for anyone needing a large quantity of exterior-rated lag fasteners; it pairs convenience with a durable ceramic coating and recognized standards, making it a practical choice for general outdoor construction. Buyers who need premium stainless or self-drilling screws should consider alternatives, but for routine decking, fencing, and mounting, this kit is cost-effective and dependable.

Frequently Asked Questions

Are these screws suitable for ACQ treated lumber?
Yes, the product description specifies suitability for use in ACQ treated lumber.

Do I need pilot holes?
Yes, a pilot hole is recommended for installation to ensure proper seating and to reduce splitting in wood.

What does the kit include?
The kit includes 100 Grade A307 lag screws and 100 USS flat washers for a total of 200 pieces.