For a specific replacement, choose a bolt that matches the required diameter, thread pitch, and length; for a range of jobs, an assortment kit offers more sizes and hardware. The five options below cover individual hex bolts, countersunk screws, and multi-size kits. The Taiss kit is best for broad size selection, while the MewuDecor bolt suits buyers needing a 5/16-18 x 1-inch hex bolt. Always confirm the fastener’s dimensions and head style fit your project before ordering.
| Product | Best For | Key Details |
|---|---|---|
| Taiss 760-piece kit | Multiple bolt sizes | 304 stainless steel; four listed thread sizes |
| MewuDecor hex bolt | Specific 5/16-18 replacement | 1-inch length; 25 pieces |
| VGBUY hex bolts | Longer 3/8-16 fasteners | 3-inch length; 8 pieces |
| HEXPHANT flat-head screws | Countersunk connections | 1/4-20 x 1 inch; hex socket drive |
| BoltsandNuts.com assortment | Bolts with matching hardware | 574 pieces; includes nuts and washers |
Taiss 760-Piece 304 Stainless Steel Kit
This kit is best for buyers who need several common coarse-thread bolt sizes for ongoing repairs or DIY work. It includes bolts and nuts in 1/4-20, 5/16-18, 3/8-16, and 1/2-13 sizes, along with flat washers and lock washers. The listed assortment covers multiple bolt lengths, and the total quantity is 760 pieces.
The 18-8 (304) stainless steel construction is described as corrosion- and oxidation-resistant for indoor and outdoor projects. Its range of hardware makes it a better choice than a single-size pack when project needs vary. Check the included size breakdown before buying: assortment kits may not provide equal quantities of every length, and the listing repeats some 5/16-18 length details.
MewuDecor 5/16-18 Hex Cap Bolts
Choose this 25-piece pack if your project calls for 5/16-18 bolts with a 1-inch length. These are full-thread hex-head cap screws made from 18-8 (304) stainless steel, with an external hex drive. The listed features identify a 5/16-inch thread diameter, 18 threads per inch, and a 1-inch screw length.
This product is best for buyers who already know the required dimensions and want a straightforward quantity of matching fasteners. The manufacturer describes the material as offering corrosion resistance for uses such as construction, agriculture, and automotive applications. Avoid this option if you need a different diameter, thread pitch, length, or head style; the product name notes other lengths may be available, but the displayed selection is 1 inch.
VGBUY 3/8-16 x 3-Inch Hex Bolts
These eight fully threaded hex bolts are best for a project requiring a longer 3/8-inch fastener. The product name specifies 3/8-16 x 3 inches, an external hex drive, and 304 stainless steel. The listing also describes clear threads and a hexagonal head intended to support fastening in applications such as mounting rails, handles, wheels, and boat or plastic bumper parts.
The 18-8 stainless construction is described as resistant to rust and abrasion, with chemical resistance. The listing says the bolts meet ASME specifications and notes they may be mildly magnetic. Confirm the thread pitch and length against your existing hardware before purchase; the detailed feature text gives a thread-pitch notation that is not clearly expressed, while the product name identifies the bolt as 3/8-16.
HEXPHANT 1/4-20 Flat-Head Hex Screws
Choose these screws when a flat-head, countersunk fastener is more suitable than a standard external hex bolt. The pack includes 30 fully threaded 1/4-20 x 1-inch screws and a hex spanner. Their 304 stainless steel construction and hex socket drive are listed for furniture, machinery, cabinets, tables, and DIY assembly.
This is best for buyers who need a flush-style flat head and have the matching hex tool. The product’s head and drive differ from the external hex-head bolts elsewhere in this guide, so it is not a direct substitute when a project requires a conventional hex bolt. Verify that the countersunk opening and 1-inch length suit the materials being joined.
BoltsandNuts.com 574-Piece Assortment
This assortment is best for buyers who want bolts, nuts, and washers organized together. It contains 574 pieces of 18-8 (304) stainless steel hardware in 1/4-20, 5/16-18, and 3/8-16 coarse diameters. A 24-compartment steel tray is included, with listed dimensions of 13-3/8 by 9-1/4 by 2 inches.
Choose it over a bolt-only assortment if having related nuts and washers in the same kit is useful. Its included diameter range is narrower than the Taiss kit’s listed range, which also includes 1/2-13. The product details do not specify every bolt length or the quantity of each individual size, so check the assortment information if a particular dimension is essential.
Buying Guide: How To Choose 18-8 Stainless Steel Bolts
Which dimensions should you check?
Match the bolt diameter, thread pitch, and length to the project or existing hardware. For example, 5/16-18 describes a 5/16-inch nominal diameter and 18 threads per inch. Do not assume two bolts fit together simply because their diameters look similar. Check the required thread standard and measure length in the way specified for the fastener’s head style.
Should you buy a single size or an assortment?
A single-size pack is practical when you know the exact fastener needed and want several matching pieces. Assortments are better for repair work that may require different lengths or diameters. Compare the listed size range and quantities, rather than relying on the total piece count alone. Kits that include nuts and washers can also reduce the need to source those components separately.
Does head style or drive type matter?
Yes. Standard hex-head bolts use an external hex drive, while the HEXPHANT option has a flat head and internal hex socket. A countersunk flat head is intended for a different fit than a conventional hex head. Confirm that the head can seat properly and that you have the appropriate wrench or hex tool.
What does 18-8 stainless steel indicate?
18-8 is a common stainless steel designation associated with 304 stainless steel. The products listed here describe their material as corrosion-resistant, but the supplied details do not establish suitability for every chemical, marine, or environmental condition. Select fasteners based on the actual exposure and project requirements.
Frequently Asked Questions
Are 18-8 and 304 stainless steel the same in these listings?
The products identify their material as 18-8 (304) stainless steel. Check each product’s specification if a particular material designation is required.
Can I use a 5/16-18 bolt in a 5/16-24 threaded hole?
No. Those thread pitches differ. Match both the diameter and threads per inch to avoid an improper fit.
Are all stainless steel bolts magnetic?
Magnetic behavior can vary. The VGBUY listing specifically notes that its bolts may be mildly magnetic; do not use magnetism alone to identify a fastener’s material.
Do these products include washers and nuts?
The Taiss and BoltsandNuts.com assortments list nuts and washers. The MewuDecor and VGBUY products are described as bolt packs, while HEXPHANT includes screws and a hex spanner.