T40 U Bit (for 3/8 Lag screw)
Available for delivery in 3–14 business days.
Please, contact us to confirm pickup availability.
T40 U Bit (for 3/8 Lag screw)
T40 U-Bit – Precision Star Drive Bit for 3/8" Lag Screws
The T40 U-Bit is a heavy-duty star drive bit engineered for driving 3/8" structural lag screws with precision and control. Designed to reduce cam-out and stripping, this bit delivers maximum torque transfer and long-lasting performance for demanding outdoor construction. Whether you're working on decks, fences, pergolas, or framing, the T40 U-Bit provides a secure fit and smooth driving experience.
Key Features:
✔ T40 Star Drive Fit – Perfectly sized for 3/8" structural lag screws, offering a tight, slip-free grip during installation.
✔ Heavy-Duty Construction – Made from hardened steel for durability and repeated use on job sites.
✔ Reduced Cam-Out – Star drive design minimizes slippage, stripping, and driver wear.
✔ Universal Compatibility – Fits most drills and impact drivers with a standard 1/4" hex shank.
✔ Essential for Structural Fastening – Optimized for use with large lags and high-torque applications.
Technical Specifications:
Bit Size: T40
Type: Star drive (Torx®-style)
Shank: 1/4" hex, fits standard drill and impact driver chucks
Material: Hardened steel
Compatibility: 3/8" structural lag screws and other T40 star drive fasteners
Length: Typically available in 2" or longer (confirm specific product variant)
Common Applications:
Deck Framing – Drive structural lags with precision and power
Pergolas & Pavilions – Secure beams, posts, and headers with ease
Ledger Board Installation – Fasten critical framing components with confidence
Outdoor Projects – Great for fencing, stair framing, and heavy-duty wood builds
Contractor & DIY Use – Durable and reliable for all types of high-strength fastening
The T40 U-Bit is an essential tool for clean, secure installation of large structural fasteners. Whether you're a pro builder or a hands-on homeowner, this bit delivers performance you can count on.
Shipping, Delivery, Pick-Up, Returns & Warranty
Please review the information below before placing your order.
Shipping & Delivery
Composite Deck Shop delivers to jobsites in Ontario that are accessible to large trucks. Shipping outside Ontario is available upon request.
Orders may be shipped by flatbed truck, flatbed trailer, or pick-up truck for smaller railing and accessory orders. Smaller orders may also ship by major couriers or Canada Post. Please confirm the shipment type at the time of purchase or select an available shipping option at checkout.
Some deliveries are unloaded with a Moffett mobile forklift, while others are offloaded by hand from a flatbed. If on-site help is required, this will be noted in the delivery option selected at checkout.
Shipping rates vary based on order size, order type, and distance from one of our four Ontario locations. Prices start at $160 per order.
Material is dropped off no more than 3 metres from where the delivery truck can park. Special placement requests, such as delivery into a garage or backyard, may be available for an additional fee and require a custom quote.
Delivery timeframes
In-stock items: Next day to 7 business days, depending on the time of year and the order size and type.
Special order items: 4 business days to 14 days, depending on order type, size, and time of year. If special order material is not available through our distribution, our sales staff will advise you individually.
Pick-Up Information
All pick-ups require either an online order with pick-up available at the selected location, or approval from one of our sales representatives by phone or email.
Please do not arrive expecting immediate pick-up. We do not operate self-serve warehouses.
After an order is placed, preparation can take from 4 hours to 3 days, provided the material is in stock at the requested location. Timing depends on material quantity, material type, and time of year. A sales representative can provide an exact timeframe.
Custom cutting is available upon request for an additional cost.
Returns & Refunds
Special order material is final sale and cannot be returned or refunded.
In-stock material may be returned within 30 days of purchase if it is in original condition and in original, undamaged packaging. A 20% restocking fee applies to all returns of in-stock material.
Customers are responsible for returning material to our store or arranging pick-up at their own cost. Composite Deck Shop may take 1 to 4 business days to inspect returned material. If the material is not considered to be in original condition, no refund will be issued and the customer must pick it up. Return condition is determined at the sole discretion of Composite Deck Shop staff.
Warranty
Composite Deck Shop does not provide warranty coverage for the products it sells. Most products are covered by the manufacturer’s warranty. Customers are responsible for reviewing the manufacturer’s warranty before purchase. Composite Deck Shop is not obligated to assist with warranty issues or claims.
Please visit the Shipping, Delivery, Pick-Up, Returns & Warranty page to review all conditions.