40Pcs Button Head Socket Cap Screws 5/16"-18x5/8" Alloy Steel Black

Name: 40Pcs Button Head Socket Cap Screws 5/16"-18x5/8" Alloy Steel Black
Brand: Harfington
Price: 15.62 USD
Availability: InStock

HarfingtonHarfingtonFrom the merchant's own product feed, re-read nightlyListed 8 hours ago

Our summary

Harfington offers a pack of 40 button head socket cap screws, sized 5/16"-18x5/8" in alloy steel with a black finish. Each piece costs $0.39, which is roughly 26% above the typical price for the category. This pack provides a fixed quantity for projects requiring this specific fastener size.

Cost / piece

$0.39/ piece

40 piece in this pack

You pay

$15.62

last seen on Harfington
confirm live price

See on Harfington · $15.62

19% above the screws, bolts & fasteners median. Cheapest is $0.007/piece →

Price & stock last checked 3 hours ago (Aug 23, 2026)

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Rank by cost per piece: 18119 of 32,052
vs category median: +19%

19% above the screws, bolts & fasteners median ($0.33/piece across 32052 tracked) · cheapest right now: $0.007/piece

At $0.39/piece, 40Pcs Button Head Socket Cap Screws 5/16"-18x5/8"… 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 3 hours ago.

Where this deal sits in screws, bolts & fasteners by cost per piece
Cheapest screws, bolts & fasteners / piece	$0.007
Median	$0.33
This deal	$0.39
Most expensive	$6.18

Timing tip: see the cheapest month to buy screws, bolts & fasteners.

About this screws, bolts & fasteners listing

Is 40Pcs Button Head Socket Cap Screws 5/16"-18x5/8"… a good deal?

About typical — $0.39/piece against a screws, bolts & fasteners median of $0.33/piece, ranking 18119 of 32,052.

What does $0.39/piece mean?

It's the real cost per piece — the price divided by the pieces in the pack (40 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?

18,118 of the 32,052 screws, bolts & fasteners we track, which puts this one 18119th by cost per piece. The next cheapest is $0.39/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.