5/16-18 UNC Nylon Insert Hex Lock Nuts, 304 Stainless Steel
Our summary
uxcell offers a pack of 50 hex lock nuts in 304 stainless steel with a plain finish, sized 5/16-18 UNC. The cost is $0.271 per piece, about 13% below the typical price for the category. These are nylon insert lock nuts, designed to resist loosening under vibration.
50 piece in this pack
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The priciest screws, bolts & fasteners deal we track costs 23× more per piece.
Price & stock last checked
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- Rank by cost per piece
- 13890 of 32,052
- vs category median
- −17%
Cheaper per piece in screws, bolts & fasteners

25Pcs #10-24x3/8" Flat Head Socket Cap Screws 304 Stainless…
At $0.27/piece, 5/16-18 UNC Nylon Insert Hex…, 304 Stainless Steel is about typical for screws, bolts & fasteners — the screws, bolts & fasteners we track range from $0.007 to $6.18/piece (median $0.33). This listing's price was last checked 6 hours ago.
| Cheapest screws, bolts & fasteners / piece | $0.007 |
| Median | $0.33 |
| This deal | $0.27 |
| Most expensive | $6.18 |
Timing tip: see the cheapest month to buy screws, bolts & fasteners.
About this screws, bolts & fasteners listing
Is 5/16-18 UNC Nylon Insert Hex…, 304 Stainless Steel a good deal?
About typical — $0.27/piece against a screws, bolts & fasteners median of $0.33/piece, ranking 13890 of 32,052.
What does $0.27/piece mean?
It's the real cost per piece — the price divided by the pieces in the pack (50 piece). Comparing per piece lets a big pack and a small one line up on the same scale, so you see true value instead of sticker price.
How many screws, bolts & fasteners are cheaper per piece?
13,889 of the 32,052 screws, bolts & fasteners we track, which puts this one 13890th by cost per piece. The next cheapest is $0.27/piece.
What should I pay for screws, bolts & fasteners?
Across 32,052 tracked screws, bolts & fasteners, under $0.14/piece is a genuinely good price, around $0.33/piece is typical, and above $0.64/piece you are paying over the odds.
Confirm the live price at the retailer before buying.




