IMSCREWS 1/4"-20 x 4" 304 Stainless Steel Carriage Bolts (20 PCS)

Reliable Support for Long-Reach Timber Connections
The IMSCREWS 1/4" x 4" carriage bolt is designed for projects requiring deep penetration and stable structural support. With a 4-inch length, these bolts are well-suited for through-bolting standard 4x4 posts or joining multiple layers of dimensional lumber. Built for versatility, they offer the stability necessary for long-term use in garden gates, fences, and outdoor furniture assembly.

High Durability and Safety-Focused Design
Forged from 18-8 (304) stainless steel, these fasteners are highly resistant to corrosion in outdoor environments and are compatible with pressure-treated lumber. The smooth round head offers a clean appearance that reduces snagging hazards, making them an ideal choice for railings, play sets, and benches. The integrated square neck prevents the bolt from spinning, allowing for easy, one-sided installation with a single wrench.

Specifications:
- Thread: 1/4"-20 Coarse; Length: 4" (Under Head)
- Material: 304 (18-8) Stainless Steel; Full Thread

FAQ:
Q: Drill bit size? A: A 1/4" bit provides a snug, structural fit.
Q: Coastal safe? A: Yes, 304 SS offers high resistance to salt air corrosion.

Pro-Tips:
1. Ensure the pilot hole is perfectly perpendicular for 4" bolts to avoid alignment issues in thick timber.
2. Pair with a flat washer on the nut side to distribute structural load and protect wood fibers.

Key Features

• PREMIUM 304 STAINLESS STEEL Crafted from high-quality 18-8 (304) stainless steel, these carriage bolts offer superior rust and corrosion resistance. Ideal for outdoor structures, garden projects, and coastal environments.
• EXTRA LONG FULL THREAD DESIGN The 4-inch length combined with a full thread design offers maximum versatility. It ensures a secure, tight fit even when joining varying material thicknesses, without the limit of a smooth shank.
• SELF-LOCKING SQUARE NECK Features a precision-engineered square neck that bites into wood to prevent spinning. This allows for easy one-sided tightening during installation, making it ideal for deep-hole fastening.
• SMOOTH SAFETY FINISH The domed round mushroom head provides a professional, low-profile appearance without sharp edges. Ideal for garden trellises, fences, and outdoor structures where safety is a priority.
• SPECIFICATIONS & NOTE Package includes 20 pieces of 1/4-20 x 4 carriage bolts only. Nuts and washers are NOT included. We recommend pre-drilling a 1/4 hole for a professional, precise fit.

Specifications

• ASIN: B0F2F4DFHL
• Internal SKU: IMS0764
• Size: 1/4"-20 x 4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 20