Best Carbon Steel Hex Bolts in 2026
Daisy
Last Updated: Jul 17, 2026
Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Fullerkreg | 9.81 | ✅ | ✅ | ✅ |
A Hexagon Bolt is a threaded fastener with a hexagonal head shape, and are designed to be installed using a spanner. Hexagon bolts are favoured for their robust shape, which makes them suitable for more heavy-duty fastening applications. Hexagon bolts are also generally available in larger sizes than alternative fasteners.
As their name suggests, Full Thread Hexagon Bolts are fully threaded. This type of bolt is required when the shaft of a fastener is being inserted completely into a threaded hole. Fully Threaded Bolts are often used to securely fasten two threaded sections together.
Made from 18-8 stainless steel, FullerkregⓇ brand screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Screws that meet ASME specifications comply with these dimensional standards.DIMENSIONS: Diameter: 5/16" | Length: 1-1/4" | Thread Type: 18 tpi Coarse Thread (Standard)
Package includes ten each of bolts, hex nuts , Flat & Lock washers
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Inrox | 9.68 | ❌ | ❌ | ❌ |
Thread Diameter 0.250"
Head Width Measured From Flat to Flat 7/16"
Head Height 11/64"
Hex Socket Drive 7/16"
Fastenere Brand Stainless Steel Fasteners are backed by Fastenere's Industry leading customer service and Guaranteed Satisfaction. These Fasteners offer a high level of corrosion resistance and will outperform other fasteners for years to come.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Inrox | 9.68 | ❌ | ❌ | ❌ |
Thread Diameter 0.250"
Head Width Measured From Flat to Flat 7/16"
Head Height 11/64"
Hex Socket Drive 7/16"
FastenereⓇ brand stainless steel Fully Threaded Hex Bolts offer the corrosion resistance and strength that makes them the best choice for an application that is exposed to a wet or damp environment and will withstand the test of time
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Aoesin | 9.95 | ✅ | ✅ | ✅ |
Standard: ASME/ANSI B18.5
Thread Size: 3/8 inch; Thread Pitch: 16 threads per inch (TPI)
Head Diameter: 0.782 inch to 0.844 inch; Head Height: 0.188 inch to 0.288 inch
Screw Length (include the square neck): 4 inch
Material: 304 Stainless Steel 18-8 that you will probably see in your pans and cookery tools. It's used for a wide variety of home and commercial applications. Because of its slightly higher strength and wear resistance than type 316, it's also used for nuts, bolts, screws and other fasteners.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| JROUTH | 8.26 | ✅ | ✅ | ✅ |
Flanged Hex Bolts Specification: M6 Bolts Pitch 1.0 mm. Thread Diameter 6 mm; Screw Length include: 12mm/16mm/20mm/25mm/30mm. M8 Bolts Pitch 1.25 mm. Thread Diameter 8 mm; Screw Length include: 16mm/20mm/25mm/30mm.
Flange Design: There have a flange on the bottom of the bolts head, the flange design distributes the load evenly, reducing stress concentration and extending the service life of the bolts. Hex head design of these bolts provides stability and prevents loosening, ensuring safety and reliability.
10.9 Class Alloy Steel: High quality 10.9 grade alloy steel, great strength and corrosion resistance to some extent to make fasteners last. Flanged Hex Bolts can withstand heavy loads and provide stability and reliability in any field that requires high strength and stability.
Package Included: Flanged bolts kit, including M8-1.25 x 16/20/25/30mm (matching with nuts, flat and spring washers) and M6-1.0 x 12/16/20/25/30mm bolts (matching with nuts, flat and spring washers). Total 360 pcs hex bolts nuts washers assortment kit, meet various needs.
Wide Range of Uses: Flange hex head bolt kits are ideal for those who need high strength screws for mechanical equipment, automotive, industrial equipment and construction structures. These bolts are an important part of any project that requires stability and security.(If there is any damage during transportation, please contact us promptly. we will give you a professional service and reply you within 24 hours. We will do our best to provide you a pleasure shopping experience. )
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Northeast Fasteners Co., Inc. | 9.76 | ❌ | ❌ | ❌ |
Hex Bolt, Nut and Washer Assortment - Grade 8 - Coarse (USS) - Yellow Zinc - 1025 pieces
Sizes: 1/4, 5/16, 3/8 and 1/2 Inch
Lengths: 3/4, 1, 1 1/2, 2 and 2 1/2 Inch
Includes 24 Hole Metal Storage Compartment with Latch
See Second Image for Detailed Product Information
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| FASTENER DEPOT, LLC | 9.76 | ❌ | ❌ | ❌ |
Hex bolt made from high quality stainless steel grade 18-8 which offers one of the highest levels of corrosion and chemical resistance and will out last all other standard and plated fasteners available
Stainless steel hex bolts are the most common construction fastener having a hex head that can be secured with a socket or wrench and mated with a nut or other internally threaded item with a machine thread pattern of 1-8
Hex bolts also reffered to as tap bolts are fully threaded with a 3 inch of thread length that is measured starting from underneath the head to the end of the thread
Fastenere brand Stainless steel bolts have a high tensile strength of 70,000 PSI and meet ASMEB14.2.1 specifications for bolts that you can trust to stand strong under presure and secure your projects for years to come with no requirement for costly maintenance
Fastenere ultra stainless hex bolts are guaranteed to out live and out last all other grades of hardware when exposed to outdoor elements
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Fastenere | 3 |
| Aoesin | 1 |
| Fullerkreg | 1 |
| Jrouth | 1 |
| Northeast Fasteners | 1 |
We've carried out a comprehensive analysis of 992 reviews on hex bolts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select hex bolts priced around $42.77, with top brands including gelisen, cseao, walfront, clipsandfasteners inc, hard-to-find fastener and mellewell and vigrue
Our team of expert editors reviewed these high-quality items and handpicked the top 7 hex bolts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include cseao, nineone, clipsandfasteners inc, amazon.com and mellewell direct and vigrue-king of screw .
We are dedicated to assisting our users in finding the right bolts Products based on their needs, saving them considerable time when choosing which hex bolts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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