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Monster Bolts, Inc. Reviews 1,029

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TrustScore 4.5 out of 5

4.7

Fastener supplier
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Review summary

Created with AI, based on recent reviews

Considering 138 reviews, reviewers overwhelmingly had a great experience with this company. Customers frequently praise the high quality of the products, noting that items are exactly as described and made from solid materials, often at excellent prices compared to local hardware stores. Many appreciate the wide selection of fasteners, including hard-to-find specialty items, which makes it easy to locate the exact parts needed for various projects. The ordering process is often described as smooth and effortless, with fast shipping and well-packaged items that arrive quickly and accurately. However, some customers experienced significant delays in receiving their orders, with several mentioning that packages took weeks to arrive or were never received at all. A few people also reported issues with product accuracy, such as receiving bolts that were not full thread as depicted or having difficulty with screws not fitting correctly, leading to frustration.

What people talk about most

Product

Customers consistently note positive experiences with product, praising the high quality, accurate... See more

Delivery service

People report positive experiences with delivery service, frequently praising the quick and fast shipping,... See more

Order

Consumers generally report positive experiences with the ordering process, often highlighting the speed of... See more

Price

Users describe positive interactions with price, consistently finding great and reasonable prices for quality... See more

Quality

Reviewers highlight positive aspects of quality, consistently praising the high quality of products, with... See more

Reviews shaping this summary

Rated 5 out of 5 stars

This was an excellent package of hardware. When I purchase fasteners I usually buy more than I need so my supplies look more like an aisle in a well stocked hardware store. What made this purchase g... See more

Rated 5 out of 5 stars

I found monster bolts two years ago. Excellent assortment of standard and metric screws and bolts in many of the common thread sizes used in present day firearms and accessories. Allows me to provi... See more

Rated 5 out of 5 stars

Monster bolts provides access to hard to find quality fasteners. The site flowed well to locate what I was looking for. Today the stainless steel versions are abundant however the specialized bl... See more

Rated 5 out of 5 stars

I emailed Monster bolts asking for dimensions for flange nuts which did not have a diagram in their listing. Jeff sent me the manufacturers Mill Test Report (thank you Jeff). The response was quick, p... See more

Company details

  1. Fastener supplier
  2. Hardware Accessories Store
  3. Hardware Shop
  4. Tool shop

Written by the company

MonsterBolts is your top choice for both metric nuts and US sizing. Shop now for a great selection of nuts and washers, screws (socket, machine and Teks), bolts, Concrete Anchors, Type 17 Deck wood screws, sealed electrical connectors and fasteners onl...

Contact info

4.7

Excellent

TrustScore 4.5 out of 5

1k reviews

5-star
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1-star

Asks customers to review

This company invites their customers to review, whether positive or negative

Replied to 22% of negative reviews

Typically replies within 24 hours

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Rated 5 out of 5 stars

Gunsmith

I found monster bolts two years ago.
Excellent assortment of standard and metric screws and bolts in many of the common thread sizes used in present day firearms and accessories.
Allows me to provide these items for repair or purchase at an excellent price point.

26 December 2025
Rated 5 out of 5 stars

Yep ... good!

Fast shipping, and AMAZING packaging. Haven't used my bolts yet, but they look great, adn I love the re-usable bags for each item.

26 November 2025
Rated 5 out of 5 stars

I ordered the wrong size screws and was…

I ordered the wrong size screws and was able to call and talk to a real person who told me how to return them. Thay stayed in contact through email the whole time. I ordered the wright size. it came well packaged and priced great. Would recommend highly.

26 November 2025
Rated 1 out of 5 stars

I was trying to order a set screw and…

I was trying to order a set screw and had no idea how to tell the size of the screw?
I thought i was ordering a set screw that was the same size of a machine screw 8-32 1/4"
the only thing that I got right was the lenght of the screw. The set screw I was looking for was a 9/64 drive, screw size just under a 1/4" 20? 5/16" 18
Did not understand the sizes of the set screws wound out I got #8-32X1/4" bag of useless screws and out the monies as well.

27 November 2025
Monster Bolts, Inc. logo

Reply from Monster Bolts, Inc.

Hi William,

Thank you for your feedback — I’m sorry to hear the screws you ordered didn’t meet your needs. Set screw sizing can definitely be confusing, especially since the thread size, length, and hex-drive size don’t always correlate the way many customers expect.

I do want to mention that we’re always happy to help determine the correct size before purchase. We didn’t receive any questions or requests for assistance on this order, and we would gladly have walked you through the proper sizing to make sure you received the right part.

We’re always here to help — I just wish we’d had the chance to do so before this became a 1-star experience.

Rated 4 out of 5 stars

Easy to find what you need

Easy to find what you need. Only place online that I was able to find the bolts I was looking for. Now for the Cons...please stop shipping USPS! It really takes too long. My order shipped on Nov 1st and today Nov 12th USPS tracking shows it is still in transit. The last package I ordered took 2 weeks also. Sorry MB but y'all really need to rethink your shipping carrier. That's my only complaint otherwise I would have definitely given 5 stars.

1 November 2025
Rated 4 out of 5 stars

Good screws at half the cost of the…

Good screws at half the cost of the manufacturers ones that we had been using. good quality. You would get 5 stars if the price was a bit lower

2 November 2025
Monster Bolts, Inc. logo

Reply from Monster Bolts, Inc.

Sometimes it seems impossible to get that 5th star. :) Thank you for the review and business.

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