--- product_id: 257362955 title: "Mellewell 1/4-20 x 3-1/2\" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets" brand: "mellewell" price: "₱1439" currency: PHP in_stock: true reviews_count: 13 category: "Mellewell" url: https://www.desertcart.ph/products/257362955-mellewell-1-4-20-x-3-1-2-hex-head store_origin: PH region: Philippines --- # 1/4"-20 Thread Precision Complete 8-Set Hardware Kit 18-8 Stainless Steel Strength Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets **Brand:** mellewell **Price:** ₱1439 **Availability:** ✅ In Stock ## Summary > 🔧 Lock in strength, style, and reliability—because your projects deserve the best. ## Quick Answers - **What is this?** Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets by mellewell - **How much does it cost?** ₱1439 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/257362955-mellewell-1-4-20-x-3-1-2-hex-head) ## Best For - mellewell enthusiasts ## Why This Product - Trusted mellewell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Thousands:** Over 1,000 five-star reviews prove these bolts deliver dependable performance and peace of mind. - • **All-Inclusive Assembly Kit:** Includes hex bolts, nuts, thick flat & lock washers—everything you need in one sleek package. - • **Precision Engineered Threads:** 1/4" diameter with 20 TPI for a secure, reliable fit every time. - • **Corrosion-Resistant Durability:** Premium 18-8 stainless steel resists rust and tarnish, built to last in any environment. - • **Versatile Industrial-Grade Use:** Perfect for home, office, machinery, and even ship assembly—engineered for professionals who demand quality. ## Overview The Mellewell 1/4-20 x 3-1/2" Hex Head Bolt Set features fully threaded, corrosion-resistant 18-8 stainless steel bolts with matching hex nuts and thick flat & lock washers. Designed for industrial and home use, this 8-piece kit ensures secure, durable fastening with precision threading and a bright plain finish, trusted by over 1,000 satisfied customers. ## Description desertcart.com: Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets : Industrial & Scientific Review: Good bolts with hardware. - These are hex bolts with hardware. I used them to fix a problem where the product manufacturer dropped the ball on the necessary hardware. They work as described and solved my problem of missing hardware. Review: Nice. Be careful. - Nice bolts, lock washers and nuts. I saw some reviews that showed broken bolts and 1 star reviews. Stainless steel will break if it is over torqued or cross threaded. Don't need to do that. ## Features - Hex screw bolt can be widely used in the home and office appliance, communication equipments, ship assembly and other machinery industry. - Made of high quality 18-8 (304) stainless steel, provides strength and great protection from corrosions and tarnishing. - Screw Thread Diameter: 1/4"; Screw Thread Pitch: 20 TPI; Screw Length: 3-1/2". Extra-large and thick flat washer. - Package Included: 8 Sets Hex Head Bolts, Hex Nuts, Flat & Lock Washers. - Used Widely: Mellewell hex bolt kits can used widely in home, office, machinary. Any questions let us know and provide professional customer service. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08G1HPJYY | | Best Sellers Rank | #4,844 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Hex Bolts | | Brand | Mellewell | | Color | Silver | | Customer Reviews | 4.7 out of 5 stars 1,008 Reviews | | Fastener Type | Bolt | | Finish Types | Bright | | Grade Rating | Grade 18 8 | | Head Style | Hex | | Item Diameter | 0.25 inches | | Item Shape | Cylinder | | Manufacturer | Mellewell | | Material | Stainless Steel | | Material Type | Stainless Steel | | Model | WLJT-1/4-20-3-1/2-8P | | Number Of Items | 8 | | Number of Pieces | 32 | | Part Number | WLJT-1/4-20-3-1/2-8P | | Screw Head Style | Hex | | Set Name | 8-Piece Hex Bolt Set with Nuts and Washers | | Size | 1/4-20 x 3-1/2" | | Size Name | 1/4-20 x 3-1/2" | | Thread Size | 1/4"-20 | | Unit Count | 8 Count | ## Product Details - **Brand:** Mellewell - **Color:** Silver - **Fastener Type:** Bolt - **Material:** Stainless Steel - **Size:** 1/4-20 x 3-1/2" ## Images ![Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets - Image 1](https://m.media-amazon.com/images/I/714LzGQFrUL.jpg) ![Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets - Image 2](https://m.media-amazon.com/images/I/61YyllYFmpL.jpg) ![Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets - Image 3](https://m.media-amazon.com/images/I/71xjEtPoT9L.jpg) ![Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets - Image 4](https://m.media-amazon.com/images/I/71NolL3CzlL.jpg) ![Mellewell 1/4-20 x 3-1/2" Hex Head Bolts with Hex Nuts and Thick Flat & Lock Washers, Fully Threaded, Stainless Steel 18-8, Plain Finish, 8 Sets - Image 5](https://m.media-amazon.com/images/I/81hHQAdXJ4L.jpg) ## Available Options This product comes in different **Color, Size, Number Of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good bolts with hardware. *by J***. on July 13, 2026* These are hex bolts with hardware. I used them to fix a problem where the product manufacturer dropped the ball on the necessary hardware. They work as described and solved my problem of missing hardware. ### ⭐⭐⭐⭐⭐ Nice. Be careful. *by J***Y on March 20, 2026* Nice bolts, lock washers and nuts. I saw some reviews that showed broken bolts and 1 star reviews. Stainless steel will break if it is over torqued or cross threaded. Don't need to do that. ### ⭐⭐⭐⭐⭐ High quality and great price *by A***R on April 19, 2026* Perfect fit for my electric tricycle axels --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/257362955-mellewell-1-4-20-x-3-1-2-hex-head](https://www.desertcart.ph/products/257362955-mellewell-1-4-20-x-3-1-2-hex-head) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-09-03*