(5 Sets) 5/16-18x4 Stainless Steel Hex Head Screws Bolts, Hex Machine Nuts, Fender Flat Washer& Split Lock Washers, 18-8 (304) S/S, Fully Threaded by Bolt Fullerkreg
Condition: New
Buy Now, Pay Later
As low as
$2
/ mo
Learn more
- – 4-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Wednesday, Mar 11
Recently Viewed
Size: (5 Sets) 5/16x4"
Features
- 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, FullerkregR 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: 4" | Thread Type: 18 tpi Coarse Thread (Standard)
- Package includes ten each of bolts, hex nuts , Flat & Lock washers
Size: (5 Sets) 5/16x4"
Color: Plain
Material: Stainless Steel
Brand: Fullerkreg
Fastener Type: Bolt
Head Style: Hex
Finish Type: Plain
Shape: Cylindrical
Item Diameter: 0.31 Inches
Thread Size: 5/16"-18
Number of Pieces: 5
Compatible groove diameter: 0.31 Inches
Manufacturer: Fullerdongluo
UPC: 799862376933
Item Weight: 8.1 ounces
Item model number: 1
Date First Available: May 27, 2019
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Mar 11
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Top Amazon Reviews
Size: (10 Sets) 5/16x1-1/4"
I recently needed a robust fastening solution for a project that required strength and corrosion resistance, and this 5/16-18x1-1/4" Stainless Steel Hex Head Screw and Nut Kit with 5/16 Nuts and 5/16 Fender Flat Washers proved to be exactly what I needed. I'm extremely impressed with the quality and performance of these fasteners. Right out of the box, you can tell these are made to last. The stainless steel construction is top-notch, giving them excellent resistance to rust and corrosion, which is crucial for outdoor and other demanding applications. What really stood out to me was how incredibly strong these screws and nuts are. I put them to the test in a demanding application, and they held up flawlessly. There was no stripping, bending, or any signs of weakness, even under significant stress. The inclusion of the fender washers is a great bonus. They provide a wider bearing surface, distributing the load more evenly and preventing damage to the materials being fastened. This added stability and security is a big plus. The threads on the screws are clean and precisely cut, making for smooth and easy installation. The nuts fit perfectly, and the whole assembly feels incredibly solid and secure once tightened. If you're looking for a reliable and incredibly strong fastening solution, especially one that can withstand harsh conditions, I highly recommend this 5/16-18x1-1/4" Stainless Steel Hex Head Screw and Nut Kit. The quality and strength of these fasteners are exceptional, and they've exceeded my expectations in every way. Great set of bolts!
...
show more
Reviewed in the United States on December 16, 2024 by Alan R
Size: (5 Sets) 5/16x4"
What I need
Reviewed in the United States on January 5, 2026 by EFREN TOLEDANO GUZMAN
Size: (10 Sets) 5/16x1"
Appears to be a good product and it should work well.
Reviewed in the United States on September 25, 2025 by wow
Size: (10 Sets) 5/16x1-1/4"
When I find a deal on nuts and bolts I buy them
Reviewed in the United States on August 16, 2025 by Harold
Size: (10 Sets) 5/16x1-1/4"
These were the perfect size for installing my boat seats and MUCH cheaper than the bid box stores! I would have paid almost triple, IF I could have even found 10 of everything I needed!!
Reviewed in the United States on October 7, 2025 by D Royster
Size: (10 Sets) 5/16x2-1/2"
Wonerful. Rebuilt my manure wheelbarrow with stainless bolts so when things break it is a much easier repair.
Reviewed in the United States on January 18, 2026 by Sheryl E
Size: (10 Sets) 5/16x2-1/2"
We're using this for customizing a hot tub and due to the chlorine and massive amounts of water, stainless was the best option. These arrived quickly and proved to be perfect for our application. The ratcheted up nice and tight, without breaking or stripping and being stainless, rust and corrosion are not a concern. The price for 10 sets is quite fair, so it's safe to say these are good bargain for a specialty fastener.
...
show more
Reviewed in the United States on October 29, 2024 by Wookieecantina
Size: (10 Sets) 5/16x3"
these are good, nothing wrong with them
Reviewed in the United States on July 24, 2025 by kbreak kbreak