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Hillman 5/16-in x 18 Zinc-plated Steel Hex Nut 5 Count

Name: Hillman 5/16-in x 18 Zinc-plated Steel Hex Nut 5 Count
Brand: Hillman
SKU: 3012057
Price: 1.78 USD
Availability: InStock
Rating: 4.8 (3552 reviews)

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4.8

3552

Inner Diameter Measurement: 5/16-in

Finish: Zinc-plated

$1.78

Package Quantity: 5

Thread Pitch: 18

Pickup

Unavailable

Shipping

Sat, Oct 17

33 available

Delivery

Sat, Oct 17

28 available

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Hex nuts are used to prevent shear movement and tension when adhering facing materials together with machine bolts. Hex nuts are commonly used in wood to wood, wood to metal, and metal to metal applications. Grade 5 medium carbon steel hex nuts are recommended for most general uses and are corrosion resistant. Be sure to pre-drill any holes and to use washers and bolts that are a similar grade and finish.

Hex nuts are designed to mechanically join materials by fastening to a bolt
Zinc finish offers moderate corrosion resistance
Can be installed by screwing onto exposed thread by hand and tightening with a wrench
Safe for use in most general home and commercial applications
Recommended for use with bolts and washers of a similar size and finish
Parts feature USS coarse 5/16-in-18 screw thread

General
Finish	Zinc-plated	Use Location	Interior
Manufacturer Color/Finish	Silver	Unit of Measure	Count
Type	Hex	Measure Type	Standard (SAE)
Material	Steel	Thread Type	Coarse
Package Quantity	5	Thread Pitch	18
Grade	5

Dimensions
Inner Diameter Measurement	5/16-in

Features
Threading	Right hand

Warranty
Warranty	None

Certifications
ACQ Approved	No	CA Residents: Prop 65 Warning(s)	No

Miscellaneous
UNSPSC	31161700

Check out the Best Selling Hex Nuts on Lowes.com

Review

4.8 out of 5

3552 Reviews

95% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

+ 41

What Customers Are Saying

Customers overwhelmingly praise these hex nuts for reliable performance and durability. Most report the nuts work exactly as intended, securing bolts effectively with perfect fit and well-made threading. The galvanized finish receives frequent praise for corrosion resistance, particularly for outdoor use. Reviewers consistently highlight strong build quality, affordability, and easy availability. A small number mention occasional sizing discrepancies or missing nuts, but these isolated concerns are vastly outweighed by positive feedback on functionality, precision, and value. Overall, customers express strong repurchase intent.

Customer review summary generated by AI, including incentivized reviews.

3552 Customer Reviews

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Did exactly what I needed it to and has held up

Milker4605October 13, 2026
From 1_SLASH_2-in x 20 Zinc-plated Steel Hex Nut 2 Count Verified Purchaser

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Would Recommend

The nuts and bolts are very sturdy and have held up my spare on the mount.

RamonOctober 13, 2026
From 1_SLASH_2-in x 13 Galvanized Steel Hex Nut Count Verified Purchaser

Was this Review Helpful ?

Tough as Nails...ummm

Would Recommend

Great nuts. Beautifully smooth threads that grip like nobody's business. It's good value as well for the number of pieces in this pack.

TonyDOctober 12, 2026
From 5_SLASH_16-in x 18 Zinc-plated Steel Hex Nut 100 Count Verified Purchaser

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Exactly the nuts that I needed for my bolts

Would Recommend

The nuts fit perfectly to the bolts I got from Lowe’s

Tim SOctober 12, 2026
From 6mm x 1 Zinc-plated Steel Hex Nut 5 Count Verified Purchaser

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COMPARE PRODUCTS

		Name	Current Item Hillman5/16-in x 18 Zinc-plated Steel Hex Nut 5 Count
		Ratings	3552
		Finish	Zinc-plated
		Material	Steel
		Thread Type	Coarse
Hillman5/16-in x 18 Zinc-plated Steel Flange Nut 3 Count	Hillman1/4-in x 20 Zinc-plated Steel Flange Nut 3 Count	Hillman3/8-in x 16 Zinc-plated Steel Flange Nut 2 Count	Hillman7/16-in x 14 Zinc-plated Steel Flange Nut 5 Count	Hillman1/2-in x 13 Zinc-plated Steel Flange Nut Count	Hillman1/4-in x 20 Zinc-plated Steel Hex Nut 25 Count	Hillman3/8-in x 16 Zinc-plated Steel Hex Nut 25 Count	Hillman1/2-in x 13 Zinc-plated Steel Hex Nut 25 Count	Hillman5/16-in x 18 Zinc-plated Steel Jam Nut 4 Count
158	158	158	158	158	52	62	39	43
Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated	Zinc-plated
Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel
Coarse	Coarse	Coarse	Coarse	Coarse	Coarse	Coarse	Coarse	Coarse