Fastener Depot 1/4 Inch By 3-1/2 Inch Partially Threaded Grade 316 Stainless Steel Hex Lag Screw Kit With 10 Flat Washers
Why you'll like it
- Superior Corrosion Resistance — Built with Grade 316 stainless steel containing molybdenum for exceptional rust protection in outdoor and marine environments.
- High Withdrawal Resistance — Features deep coarse threads designed to grip securely into solid wood components and heavy timber framing.
- Even Clamping Load — Includes heavy-duty commercial grade flat washers that distribute pressure evenly across fastened surfaces.
- Easy Installation — Designed with a standard hexagonal drive head for effortless tightening using a socket wrench.
Product details
Description
Upgrade your heavy-duty woodworking and structural framing projects with the Fastener Depot Grade 316 Stainless Steel Hex Lag Screw Kit. Built for professionals and DIY enthusiasts who demand uncompromising durability, this kit includes ten partially threaded lag screws and ten heavy-duty commercial grade flat washers.
Crafted from premium grade 316 stainless steel containing added molybdenum, these fasteners offer exceptional resistance to rust, saltwater, and harsh chemical environments, making them ideal for outdoor decks, marine applications, and high-moisture installations. Featuring a sturdy hexagonal drive head for high-torque installation with a socket wrench and deep coarse threads for maximum withdrawal resistance in solid wood, these screws ensure a secure, long-lasting hold.
Pre-drilling with an 11/64-inch drill bit ensures smooth placement, while the included flat washers evenly distribute the clamping load across surfaces. Exceeding ASTM F593 standards, this reliable fastening solution delivers superior structural integrity for joining beams, ledger boards, fence posts, and heavy timber trusses.
How to use
- Pre-drill a pilot hole using an 11/64-inch drill bit into the wood components.
- Place the flat washer onto the 1/4-inch hex lag screw.
- Align the fastener with the pre-drilled hole and drive it securely into the material using a 9/16-inch socket wrench until firmly seated.
Ingredients
Grade 316 Stainless Steel (A4 Alloy containing Chromium, Nickel, and Molybdenum)
As printed by the brand. Check the pack label if you have an allergy.
Specifications
| Brand | Fastener Depot |
|---|---|
| UPC | 680699491671 |
| Ships from | USA (sourced directly), checked in Navi Mumbai |
| Sold by | Dropy.in |
Ratings & reviews
From our customers
FAQs
What size socket wrench is needed to install these lag screws?
A 9/16-inch socket wrench is required for the installation of these hex head lag screws.
What pre-drill hole size should be used for this 1/4-inch lag screw?
It is recommended to use an 11/64-inch drill bit for pre-drilling the pilot hole before installation.
Are these screws suitable for outdoor and marine use?
Yes, they are made from Grade 316 stainless steel, which provides superior resistance against rust, moisture, and saltwater corrosion.
Are these hardware products authentic USA imports available in India?
Yes, this is an authentic USA-imported product sourced directly by Dropy India to ensure genuine manufacturer quality.
What is included in the package?
Each kit includes 10 partially threaded Grade 316 stainless steel hex lag screws and 10 heavy-duty flat washers.
How long will delivery take?
Most orders arrive in 15–20 days: we source each product directly from the USA, check it at our Navi Mumbai warehouse and pack it on video. Items marked Dropy Express ship from our India warehouse and arrive in 3–5 days.
Is cash on delivery available?
Full cash on delivery is available all over India on Dropy Express items. For other orders from ₹2,499 to ₹15,000 you can use Partial COD: pay 25% online now and the rest in cash on delivery.
Are your products genuine?
Yes. Every product is 100% authentic, sourced directly from the USA, quality-checked and packed on video at our Navi Mumbai warehouse.
What if my order arrives damaged or wrong?
Write to us at [email protected] as soon as it arrives. Damaged, wrong or not as described, our Buyer Protection gives you a full refund. The details are in our Return, Refund & Cancellation Policy.
Is delivery free?
Delivery is free on orders from ₹1,499. Below that a ₹79 delivery fee applies.