Ratings & Reviews for Hillman 5/16-in x 18 Zinc-plated Steel Nylon insert Nut Count
4.7
Review
4.7 out of 5
953 Reviews
95% Recommend this product
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise these lock nuts for exceptional locking performance, with the nylon insert securely holding bolts without additional washers. Reviewers consistently note they are true to size, thread smoothly, and perform reliably under vibration and heavy loads. Most emphasize strong manufacturing consistency, seamless compatibility with standard fasteners, and excellent value for the price. Repurchase intent is high, with customers describing them as dependable and effective. A very small number report isolated issues like cross-threading, but these are negligible compared to widespread satisfaction.
Customer review summary generated by AI, including incentivized reviews.953 Customer Reviews
Doesnt stay tight
It does not stay tight
ColetteUKJune 24, 2026
From 6mm x 1.00 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser
From 6mm x 1.00 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser
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Price
Holds goods
From 3_SLASH_8-in x 16 Zinc-plated Steel Nylon insert Nut Count Verified Purchaser
washer
same as washer
From 6mm x 1.00 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser
SECURE SCREWS
From 6mm x 1.00 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser
Perfect
Perfect
From 5_SLASH_8-in x 11 Zinc-plated Steel Nylon insert Nut Count Verified Purchaser
Good quality worked well
Easy to use self locking washer
From 1_SLASH_2-in x 13 Zinc-plated Steel Nylon insert Nut Count Verified Purchaser
Good bolt
Bolt screws in well
From 8mm x 1.25 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser
Part needed
It was the part that I needed to complete a repair task
From 1_SLASH_2-in x 13 Zinc-plated Steel Nylon insert Nut Count Verified Purchaser
Threads are not stripped
I like that they wish not chipped up very smooth the threads was good easy to put on
Verified Purchaser
We are very sorry to hear that this product was unsatisfactory and did not meet your expectations. We understand how disappointing that can be. Pleas...
Better the lock washers
Performed exactly as designed
From 3_SLASH_8-in x 24 Zinc-plated Steel Nylon insert Nut 2 Count Verified Purchaser
You will be able to find matching products .
The nuts have built in lock washer.
From 6mm x 1.00 Zinc-plated Steel Nylon insert Nut 4 Count Verified Purchaser