# Hillman Stainless Steel Carriage Bolt 3/8 x 2-1/2 Inch | 25-Pack, Grade 2 **Brand:** Hillman **SKU:** hhe1171 **ASIN:** B000UGSZ8S **Canonical URL:** https://crowcrowcrow.com/p/hillman-832630-stainless-steel-carriage-bolt-2-1-2-inch/hhe1171 **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹4,732 **Discount:** 19% **Customer rating:** 4.70/5 from 30 ratings ## Description Hillman Stainless Steel Carriage Bolts (3/8" x 2-1/2", 25-Pack) offer rust-proof fastening for wood-to-wood or wood-to-metal projects. Their self-locking square neck and semi-flush finish simplify installation. Imported from USA, duties included, arrives in 13-15 days. ## Highlights - Rust-Proof for Outdoor Use — Stainless steel construction provides superior rust prevention, ideal for decks, fences, and garden furniture exposed to Indian monsoons and coastal humidity. - Cost-Effective 25-Pack — This pack provides 25 bolts, offering ₹189 per bolt per bolt, ensuring ample supply for multiple projects without frequent reordering. - Easy Installation, Clean Finish — The self-locking square neck prevents spinning, and the flat head creates a semi-flush finish, eliminating the need for a washer and simplifying assembly. - Durable Grade 2 Hardness — Built to withstand moderate loads, these Grade 2 bolts are suitable for general construction, furniture assembly, and DIY projects requiring reliable fastening. ## Key features - Carriage Bolts are designed to fasten a wooden face to either wood or metal - Flat head provides a semi-flush finish to applications - The heads is designed to eliminate the need for a washer - Square underside of the head is self locking to eliminate the need for a driving tool - Stainless Steel provided superior rust prevention and bright finish ## Why choose this product **Superior Corrosion Resistance for Indian Climates** — Hillman Stainless Steel Carriage Bolts are engineered for durability, especially in challenging Indian weather. The stainless steel composition actively resists rust and corrosion, outperforming standard plated fasteners in humid coastal regions and during monsoon seasons. This ensures your outdoor structures like decks, pergolas, and garden furniture maintain their integrity and appearance longer, reducing the need for premature replacement or maintenance compared to locally available options that may corrode faster. **Ideal for Wood-to-Frame Projects, Skip if Sensitive to Imperial Sizing** — These bolts are perfect for securely fastening wooden faces to wood or metal frames, offering a clean, semi-flush finish and easy installation thanks to their self-locking square neck. They are best suited for applications where a smooth head is desired, such as in visible furniture or decking. However, if your project requires metric (M-series) fasteners, or if you are unfamiliar with imperial sizing (3/8" diameter, 2-1/2" length), you may find it challenging to source matching nuts and washers locally in India. Consider metric alternatives if precise thread compatibility is critical. ## How to use 1. Measure the combined thickness of the materials you are joining. Choose a carriage bolt length that will pass through both materials and allow for a nut and washer, with a few threads protruding. — Select Bolt Size 2. Drill a hole for the bolt shank. For wood, a simple round hole is sufficient. For metal, a square hole is recommended to seat the bolt's square neck and prevent turning. — Prepare Hole 3. Insert the bolt through the aligned holes. Place a nut on the threaded end and tighten it securely. The square neck will engage and prevent the bolt head from spinning. — Insert and Tighten ## Product details | Field | Value | |---|---| | Application | Fastening wooden face to wood or metal frame | | Head Finish | Semi-flush | | Neck Feature | Self-locking square neck | | Outdoor Use | Suitable due to stainless steel | | Cost per bolt | 25 bolts at ₹4,732 — ₹189 per bolt | | Shelf life after opening | Indefinite (metal fastener) | | Contraindications | Imperial sizing may require matching imperial nuts/washers; not suitable for high-tensile structural applications requiring higher grades. | | Allergens / common irritants | None | | Brand | Hillman | | Part Number | 832630 | | Model Number | 832630 | | Material | Stainless Steel | | Finish | Stainless Steel | | Head Style | Flat Round | | Bolt Type | Carriage Bolt | | Diameter | 0.375 inches (3/8") | | Length | 2.5 inches (2-1/2") | | Thread Size | 3/8" x 2-1/2" | | Thread Type | UNC (Coarse) | | Thread Coverage | Partially Threaded | | Hardness Grade | Grade 2 | | Number of Items | 25 | | Package Weight | 1.14 kg (2.5 lb) | | Package Dimensions | 11.6 cm x 8.8 cm x 6.0 cm (4.6" x 3.5" x 2.4") | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | ## Frequently asked questions ### What is a carriage bolt used for? A carriage bolt has a smooth domed head and a square neck under the head that locks into wood or a squared hole, preventing the bolt from turning while you tighten the nut. It is commonly used for wood-to-wood and wood-to-metal joints such as decking, fencing, playground equipment, and timber framing. ### How do I choose the right size carriage bolt? Measure the combined thickness of the materials being joined, then add room for the washer and nut. Choose a diameter suited to the load (thicker for structural joints) and a length that leaves a few threads exposed past the nut. Match the finish to the environment — stainless or galvanized for outdoor use. ### Are Hillman carriage bolts safe for outdoor use in India? Yes, these Hillman carriage bolts are made from stainless steel, providing superior rust prevention. This makes them highly suitable for outdoor applications in India's humid and monsoon-prone climates, resisting corrosion far better than standard plated fasteners. ### Can I use these 3/8" x 2-1/2" bolts with standard Indian nuts? These bolts use imperial sizing (3/8 inch diameter, 2-1/2 inch length). While some imperial nuts may be available, metric (M-series) nuts are more common in India. You may need to source matching imperial nuts and washers separately to ensure a proper fit. ### What is the difference between Grade 2 and Grade 5 bolts? Grade 2 bolts are suitable for general-purpose applications and moderate loads. Grade 5 bolts offer higher tensile strength and are used for more demanding structural applications. These Hillman bolts are Grade 2, ideal for most DIY and furniture projects. ### How to buy original Hillman carriage bolts in India? Purchase original Hillman carriage bolts from authorized US retailers, imported exclusively for you by CrowCrowCrow. They are factory-sealed, all customs duties and GST are included in the price, and they are shipped via ExpressBox tracked delivery. ## Compliance No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging. ## Images 1. https://images.crowcrowcrow.com/B000UGSZ8S-0.webp 2. https://images.crowcrowcrow.com/B000UGSZ8S-3.webp --- Source: https://crowcrowcrow.com/p/hillman-832630-stainless-steel-carriage-bolt-2-1-2-inch/hhe1171 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 13-15 days. Prices are all-inclusive (duties + GST).