IMSCREWS 1/4"-20 x 3-1/4" Long 304 Stainless Steel Carriage Bolts (5 PCS)

Substantial Reach for Deep Structural Timber Connections
The IMSCREWS 1/4" x 3-1/4" carriage bolt is engineered for structural projects requiring reliable penetration through thick materials. With a standard 1/4-inch diameter and an extended 3.25-inch length, these bolts are the ideal choice for securing dual-layered lumber (actual 3") or fastening heavy hardware to thick garden beams. The full thread design ensures maximum flexibility, providing a snug and secure connection regardless of the specific material combination. Built for long-term use, they offer the stability required for outdoor play sets, deck railings, and landscape timber projects.

High Durability and Safety-Focused Design
Forged from premium 18-8 (304) stainless steel, these fasteners are highly resistant to rust and corrosion in coastal or humid environments. The smooth round head offers a clean appearance that reduces snagging hazards, making them a safe choice for high-traffic residential areas and children's play equipment. The integrated square neck prevents the bolt from spinning during installation, allowing for easy, one-sided fastening with a single wrench from the nut side.

Specifications:
- Thread Size: 1/4"-20 Coarse (UNC); Length: 3-1/4" (Measured from Under Head)
- Material: 304 (18-8) Stainless Steel; Full Thread

Pro-Tips:
1. Use a 1/4" drill bit to ensure a snug, structural fit for the square neck.
2. Pair with stainless steel flat washers and hex nuts on the nut side to distribute structural load and protect wood fibers.

Key Features

• Extended Reach for Deep Joining: The 3.25-inch length is specifically designed for through-bolting thick timber layers, such as double 2x4 beams, without the bulk of larger diameter bolts.
• Full Thread Maximum Grip: Featuring a precision-cut 1/4-20 full thread, these bolts provide consistent clamping power across the entire 3-1/4 span, ensuring a stable and gap-free connection.
• Outdoor-Ready 304 Stainless: Forged from 18-8 (304) stainless steel to endure rain, snow, and humidity. Highly compatible with ACQ pressure-treated lumber used in modern garden projects.
• Safety-First Aesthetic Finish: The smooth, snag-free domed head eliminates sharp edges, making it the top choice for family projects like playground swings, slides, and garden benches.
• Self-Locking Square Neck: The precision square shoulder bites firmly into wood fibers, locking the bolt in place so you can easily tighten the nut with one hand from the opposite side.

Specifications

• ASIN: B0F2F2KPHG
• Internal SKU: IMS0753
• Size: 1/4"-20 x 3-1/4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 5