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1/4" -20 Hex Drive Threaded Inserts (8 per Pack)
1/4" -20 Hex Drive Threaded Inserts (8 per Pack) Item #31872
In stock
$6.99 Pack
5/16" -18 Hex Drive Threaded Inserts (8 per Pack)
5/16" -18 Hex Drive Threaded Inserts (8 per Pack) Item #31880
In stock
$6.99 Pack
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Hex Drive Threaded Inserts-Choose size

Item #
GRP364_1
Rating:
82% of 100
(73)

Use for a tight grip! Larger teeth give increased holding strength, ideal for end grain and particle board applications. Made of die cast zinc alloy. Has a self tapping harpoon thread. Thread listed is the size of the internal thread size.

(1) Pack of Hex Drive Threaded Inserts
More Information
Weight 1.0000
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4.1 / 5.0
72 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
45
9
6
7
5
extality what I wanted
December 24, 2018
Purchased
 over 2 years ago
Chair repair
Kitchen chair had similar inserts that pulled out and/or crumbled. These inserts were slightly larger and fit very solidly in locations where we replaced damaged ones. A perfect repair for the on chair that needed repair. Used old bolts that were also 5/16 -18. Will probably need more for future repairs on the 5 remaining chairs. Wife’s happy as am I. Please keep in stock.
August 16, 2018
Purchased
 1 year ago
Deep thread threaded insert
These inserts replaced threaded inserts with shallow threads because they were in end grain. After the shallow threads pulled out when tightened, I bought these and they are holding very well.
August 11, 2018
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
Fast and easy to install
Very easy to work with it especially having to change to a new set of legs with standard measurement
August 3, 2018
Purchased
 1 year ago
Woodworking Experience:
Advanced
Hold well
Use these to secure upper and lower cabinet sections.
The inserts hold down the upper section to the lower counter top.
The inserts hold down the upper section to the lower counter top.
May 24, 2018
Purchased
 over 3 years ago
Woodworking Experience:
Advanced
Work well thanks
February 5, 2018
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
USED TO ADD DIFFERENT USEFULL THINGS TO MY WORK BENCH.
December 13, 2017
Purchased
 over 2 years ago
worked good could make handles ahead
December 1, 2017
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
I like the length
For what I used them, which was putting a bolt in some 3/4" boards, they worked great. I really like the longer length. There was so much more thread. The whole project seems sturdier. They could be a problem in a much thinner board, but I rarely use them in less than 3/4" anyway.
November 27, 2017
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
Excellent product and works as advertised in an end grain application. However, the supplied installation sheet needs the table revising to clearly show the correct drill sizes for softwood / hardwood applications.
November 12, 2017
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
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Browse 10 questions Browse 10 questions and 15 answers
Why did you choose this?
Rockler Store
required in building plans
Raymond H on Aug 18, 2018
I had to repair a bed.
Dan D on Jul 19, 2018
required in building plans
Raymond H on Aug 18, 2018
I used these for holding my stair rails for sliding material into my basement workshop. When the rails are not being used the inserts are barely visible.
Dave J on Jul 25, 2018
I had to repair a bed.
Dan D on Jul 19, 2018
building a crib and this is required in the plans
STEVEN R on Jul 19, 2018
Recommended part by Wood Magazine
Robert B on Jul 18, 2018
What I needed at a good price
Jeff S on Jul 16, 2018
Creating a coffee bar for my wife and need these to attach the feet that I am turning for it.
Kenneth B on Jun 23, 2018
Pattern called for them
Lora Y on Jun 19, 2018
Slotted brass inserts break when putting into hardwoods.
Jonathan B on May 19, 2018
Required for Platform Bed in Wood Magazine issue Vol. 34. No 7 Issue No. 251
NathanielV E on Apr 28, 2018
I couldn't find them at any local stores so I decided<br />to try the internet and your name came up so I checked your inventory and found what I needed.
Danny F on Apr 24, 2018
it's what I needed
Larry B on Apr 5, 2018
need
tom p on Apr 1, 2018
I broke one of these trying to install it with the ice cream scoop kit.
garrett g on Mar 24, 2018
Works great! Easy to install.
Chuck D on Mar 21, 2018
It matched the exact size that I needed to replace.
Christopher Y on Mar 12, 2018
Same as above
Don P on Feb 20, 2018
i have gotten them from you befor<br />kitchen chair repairs, one size up from originals
kent l on Feb 17, 2018
I tried the ones that you insert with a flat head screw driver but they break. I have always liked <br />the hex drive and you are only ones that have them.
Robert L on Feb 16, 2018
I will be using this in conjunction with the Connector Bolts from Rockler for knock-down furniture.
Shashwat P on Feb 14, 2018
putting in end grain
Vernon M on Jan 30, 2018
My husband needs it to build a bed frame that was in his wood magazine.
Cindy V on Jan 28, 2018
Ran out,needed for various jigs that I use
Edwin H. Ferguson J on Jan 22, 2018
love the hex drive since it is much easier to use a power drill to drive them in straight
Larry W on Nov 17, 2017
I have a piece of furniture where one of these items failed, so I need to replace it.
Edward S on Aug 11, 2017
USE THEM ALL THE TIME. BEST QUALITY AND FUNCTION
Pedro F on Jul 19, 2017
Home project
James G on Jun 4, 2017
needed to repair loose legs on dining chairs
Mike M on Apr 25, 2017
Because you didn't have 3/8" in stock...
David W on Jan 25, 2017
to secure the legs
STEVE L on Jan 13, 2017
Loose legs on dinning room chairs
Danny S on Jan 9, 2017
Part needed
Thomas D on Dec 31, 2016
easy to thread in with the hex drive
Jon M on Dec 15, 2016
poor quality - they blew out and cracked when I tried to install them
EarlS on Nov 18, 2016
To turn seasonal handles for cheese knife kit, I have that kind of wife
Jeffrey D on Nov 8, 2016
I bought these to hold parts of a bed, I am building, together to aid in disassembling when it has to be moved.
Stanley G on Oct 25, 2016
Recommended in the plans I purchased and not available locally.
Tom P on Jul 24, 2016
outstanding in construction of outdoor furniture. Sturdy and easy to install
Patrick D on Jun 30, 2016
I needed them to fix a chair
Thomas C H on Apr 10, 2016
need it for speaker stand
RANDY J on Apr 1, 2016
building a quilt ladder
Ronald D on Mar 13, 2016
for the bean bag game I make
Bruce M on Mar 1, 2016
Project
Ron O on Feb 26, 2016
Needed for a project.
Ron S on Jan 27, 2016
They work perfectly for my applications when building collapsable display stands
Gill W on Jan 8, 2016
to repair chairs
ralph c on Jan 3, 2016
Making table legs and this item is similar to the existing ones
Kenneth K on Jan 3, 2016
Making jigs.
Robert G on Jan 1, 2016
Needed this size.
James L on Dec 19, 2015
i needed new ones 2 replace the broken. also near impossible 2 find locally
tom p on Dec 2, 2015
I used these for holding my stair rails for sliding material into my basement workshop. When the rails are not being used the inserts are barely visible.
Dave J on Jul 25, 2018
building a crib and this is required in the plans
STEVEN R on Jul 19, 2018
how deep are the internal threads? how long is the overall length of the insert?
A shopper on Aug 5, 2015
BEST ANSWER: The threads go all the through. This is not a blind insert. Overall length is 13/16"
What size hex driver do each of these sizes require?
Quiggley on Aug 20, 2019
Best threaded insert to use in 3/4 plywood edge to draw edge into a dado and then be able to take apart and reassemble?
Stewart O on May 9, 2015
BEST ANSWER: If you are talking about inserting these into the edge of the plywood that you will insert into a dado, I would not recommend it. They work by forcing themselves into a hole intentionally drilled too small. That's so that they can mash (as opposed to cut) the necessary threads they need for their holding power. This very action will split apart your plywood. These things work very well for their intended use, in the flat side of a piece of wood, even plyood.
what can i use to thead dowels and the corresponding hole?
A shopper on Aug 19, 2015
BEST ANSWER: To join dowels, I always use the threaded insert with steel hanger bolts. One dowel gets the insert and the corresponding dowel gets the steel hanger bolt and screw the dowels together. Note: be sure to find the center of each dowel before inserting the hardware.
Steel Hanger Bolts-Steel Hanger Bolts
Steel Hanger Bolts-Steel Hanger Bolts
What is recommend hole diameter for the 5/16-18 in hardwood like oak, maple, or walnut?
Mike F on Apr 11, 2016
BEST ANSWER: I wouldn't use this in a hardwood. It is tapered, and a hardwood has little or no give. Rockler has other options where the shaft is straight.
what hole size is required for the 1/4"-20 insert and how deep should the hole be drilled?
Matt T on Jun 24, 2016
BEST ANSWER: For softwoods, 11/32" is recommended, for hardwoods 3/8" is recommended.An 11/32" drill bit is hard to find. Not a standard size.
The hole depth depends upon the connector bolt length. Subtract the thickness of the wood being attached from the connector bolt length, & I add 1/4" to that number to keep from bottoming out.
What is recommend hole diameter for the 5/16-18 in soft wood?
Fran B on Feb 13, 2017
BEST ANSWER: 7/16 in soft wood, 1/2 in hard; use a drop of CA glue when final inserting, works well for me.
How long are the 5/16-18 inserts item #31880? I plan to install them in 3/4" cherry plywood.
Dominator on Jun 18, 2020
BEST ANSWER: The insets are approx. 0.79" long. I would suggest the 5/16" x 18 E-Z Knife Threaded Insert which is 0.625" long.
Threaded Insert for Hard Wood - Brass - 5/16-18
Threaded Insert for Hard Wood - Brass - 5/16-18
I need to purchase some of these. the ones I removed required a 5/16 hex head allen wrench. Is this, then, the size I need to buy as a replacement?
Joe F on Oct 24, 2017
BEST ANSWER: If they take a 5/16" bolt then that would be correct.
How long is the 1/4"-20 threaded insert?
John mc. on Aug 28, 2016
BEST ANSWER: 13/16"
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

Prop 65 WarningWARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.
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