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Paulin 1/4 x 3-inch Carriage Bolt - Zinc Plated - Grade 2 - UNC

Model # 329-320|Store SKU # 1000136348

Overview

Model # 329-320 Store SKU # 1000136348

Carriage Bolts are used in wood or metal to wood applications with a domed top and a square under the head. This pulls into the wood as the nut is tightened. When using carriage bolts always use a flat washer between the wood and hex nut to eliminate pull-through of the nut in the wood. Drill pilot hole slightly larger than body diameter of bolt. Insert the carriage bolt so the headed end is on finished side of project for appearance or safety. Length is measured from under head to end of bolt. Steel is zinc plated for moderate protection against rust. Use hot dipped galvanized finish or stainless steel where corrorsion and rust is of concern or for exterior projects.

  1. Diameter: 1/4 inch
  1. Length: 3 inch
  1. Thread Type: UNC
  1. Head Type: Round
  1. Metal/Strength: Grade 2
  1. Finish: Zinc Plated
  1. In select stores available in packs of 50

Specifications

Dimensions

Packaged Depth (in inches)
4.5
Packaged Height (in inches)
3
Packaged Weight (In lbs)
2.15
Packaged Width (in inches)
3.25

Details

Country of Origin
O-Other
Finish
Zinc Coated
Head Style
Round
Length (in.)
3
Material
Steel
Material
Steel
Package Quantity
1
Plating
Product Diameter
1/4 in.
Product Finish/Material
Zinc
Product Length
3 in.
Type
Standard

Warranty / Certifications

Call 1-800-268-4000
1/4 x 3-inch Carriage Bolt - Zinc Plated - Grade 2 - UNCPaulin 1/4 x 3-inch Carriage Bolt - Zinc Plated - Grade 2 - UNCCarriage Bolts are used in wood or metal to wood applications with a domed top and a square under the head. This pulls into the wood as the nut is tightened. When using carriage bolts always use a flat washer between the wood and hex nut to eliminate pull-through of the nut in the wood. Drill pilot hole slightly larger than body diameter of bolt. Insert the carriage bolt so the headed end is on finished side of project for appearance or safety. Length is measured from under head to end of bolt. Steel is zinc plated for moderate protection against rust. Use hot dipped galvanized finish or stainless steel where corrorsion and rust is of concern or for exterior projects.
Paulin
1000136348
1/4 x 3-inch Carriage Bolt - Zinc Plated - Grade 2 - UNC is rated 4.2 out of 5 by 54.
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Rated 1 out of 5 by from Ruined my weekend I couldn't put the new floor on my utility trailer together and now my weekend is ruined. I've worked on 10 million dollar machines and $200 cars, so I know what to expect from the entire spectrum of fasteners. These carriage bolts are garbage. I purchased a pack of 50 and _many_ of them do no fit the 1/4-20 nuts I purchased (5026-214). At first I thought the galvanized coating made the threads a bit gritty, but no, even with a socket wrench the nuts and bolts simply do not come together without having to muscle them on. I shouldn't need 1ft of leverage to tighten 1/4-20 bolts, They should come together using only fingers. I'm certain that all of the bolts are indeed 1/4-20s. There appears to be an inconsistency in the threads or a major problem with the HDG coating. I thought paulin made decent fasteners. Where is the quality control?
Date published: 2015-10-25
Rated 5 out of 5 by from Boltiest bolt. Very good bolt, bolted strongly... the nut was able to grip tightly. Together, nothing could stop the pair from holding each other for all eternity. I have faith that this was the boltiest bolt you can buy.
Date published: 2020-08-28
Rated 5 out of 5 by from bolt for general use just a normal zinc plate bolt. Good for normal use in my Brocken trampoline rusty bolts.
Date published: 2021-06-24
Rated 1 out of 5 by from Incorrect order Incorrect type of bolts, incorrect quantity of bolts, incorrect quantity of nuts.
Date published: 2021-07-07
Rated 2 out of 5 by from Carriage head bolts, check merchandise Purchased during Covid shutdown, bolts are fine, picker got 5 of the right size and one larger in the bag, requiring an extra visit to store and a couple of phone calls, very inconvenient
Date published: 2020-08-12
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Will this carriage bolt ruin my weekend?

Asked by: Steve Drangus
Home Depot asked me to answer your question. I purchased these carriage bolts earlier in the summer, and they have been holding together a bench ever since. Very reliable. No drama. Especially on weekends. No posers or weak links in the 2 dozen I got. I hope yours are equally solid.
Answered by: Jon A
Date published: 2020-09-11

does the 1/4 inch-20 hex nut fit this bolt?

Asked by: captain morgan
yes it will
Answered by: Paulin - Product Expert
Date published: 2020-05-08

What threading is this?

Asked by: Jeffery
UNC
Answered by: Paulin - Product Expert
Date published: 2021-01-07

in the answer above, what are these units? pounds?

Asked by: matthew
Pounds
Answered by: Paulin - Product Expert
Date published: 2020-06-01

hello, can i please know the grade of this bolt? more specifically the shear strength

Asked by: matthew
Hello, the grade of this Carriage Bolt is Grade 2. The shear loads are as follows: Calculated Shear Load - Body = 6300 Calculated Shear Threads - Body = 5250
Answered by: Paulin - Product Expert
Date published: 2020-05-29

what size nut and washer to use with this carriage bolt? Post a link if possible.

Asked by: Mike Rotsch
You can use a 1/4 nut and washer but it does need to be hot dipped galvanized
Answered by: Paulin - Product Expert
Date published: 2020-06-17

how many pieces in a box?

Asked by: George
Hello. This item has 20 carriage bolts in a box. Thank you.
Answered by: Paulin - Product Expert
Date published: 2020-05-10

Is this the nut that would go with this bolt? -Paulin 1/2-inch-13 18.8 Stainless Steel Finished Hex Nut - UNC -Model # 5026-222|Store SKU # 1000125966

Asked by: Dalton
The correct nut for this bolt is article #1000141758 1/2-13 FINISHED HEX NUT GR 2 HDG (Model #856-122)
Answered by: Paulin - Product Expert
Date published: 2020-04-21
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