Screw & Bolt Kits
2,160-Piece Metric Screw Kit, M2 to M6
$23.99★★★★★ 4.7 (1,093)
2,160 pieces · 12.9 alloy steel, black zinc
We're Hapric. The fastener assortment kit that stays sorted.
Metric screws, nuts and washers, set screws, threaded inserts and dowel pins, each size in its own labeled compartment with the hex key already in the lid. Hardware packed for the bench that fixes appliances, furniture and 3D printers.
Sorted by size, labeled twice
The sticker on the lid mirrors the compartments inside. A screw goes back to the bin it came from, a refill goes in by the label, and the kit still reads right a year later.
Steel we would put in our own machines
Grade 12.9 alloy steel with black zinc for strength, 304 stainless where water lives, 8.8 black oxide on the flange bolts. Threads cut tight, no burrs, average error under 0.01 mm.
The key is already inside
Every screw and set screw kit ships with hex keys cut to its sizes and a pair of tweezers for the small ones. Open the storage case and start.
Most reached-for
See every kitBest sellers from the drawer
Screw & Bolt Kits
Screw & Bolt Kits
600-Piece M3 Screw Kit
$6.99★★★★★ 4.7 (1,093)
600 pieces · 12.9 alloy steel, black zinc
Set Screws
485-Piece 304 Stainless Set Screw Kit
$9.99★★★★★ 4.8 (107)
485 pieces · 304 stainless steel
Threaded Inserts
191-Piece Threaded Insert Kit for Wood, 10 Sizes
$18.99$20.98★★★★☆ 4.4 (192)
191 pieces · White zinc plated carbon steel
One case instead of a trip to the hardware aisle
A labeled Hapric nut and bolt assortment costs about what a handful of loose screws does at the counter, and it covers the next fifty repairs.
Fasteners for every job
Shop by compartment
Six lines, one way of packing them: thick fixed dividers, a label on every bin and the tool to drive it.
From the bench
Metric screw kits that match the machine
M2 to M10, hex nuts and washers included
Our metric screw assortment kits pair socket-head machine screws with the hex nuts, flat washers and lock washers the factory used, so a camera plate, a printer gantry or a dishwasher panel goes back together with the right stack under every head.
Each metric size comes in the four to eight lengths that daily maintenance actually calls for, in standard coarse thread. The steel is grade 12.9 alloy under black zinc or 304 stainless, and the hex key in the lid is cut to that kit.
See the screw and bolt kitsSet screws for the handle that keeps coming loose
Metric and SAE, 304 stainless or 12.9 alloy
A set screw assortment proves its worth the first time a faucet lever, door knob or mixer collar spins free. We bag every size separately, metric M3 to M8 and SAE from 1/8-40 to 5/16-18, so the hex socket you need is the one you pull out of the box.
The cup point is cut and polished to grip without chewing the shaft, and the socket takes real torque from the included hex keys.
See the set screw kitsThreaded inserts for wood, and the tips for plastic
Knurled steel for furniture, brass tips for 3D prints
Threaded inserts turn a stripped hole in pine, plywood or MDF into a metal thread that a bolt can use for years. Ours come with matching bolts or nuts and the hex wrench that drives them, in 1/4-20, 5/16-18 and 3/8-16.
For plastic parts we make brass heat-set tips from M2 to M8 that screw onto a soldering iron and sink an insert straight into a 3D-printed boss.
See the threaded insert kitsBuilt for the repair
Why the drawer is labeled
Every compartment labeled. Every size where you left it.
Thick fixed dividers
Compartments are molded, not loose bins, so sizes cannot migrate when the storage case rides in a truck.
Labels inside and out
The lid map and the inner stickers match one to one; refill from the label, not from memory.
Metric standard, 0.01 mm
Threads follow the metric standard with an average error under 0.01 mm, so a nut from our kit runs on a bolt from any hardware store.
Hex keys and tweezers
Keys cut to the kit's sizes and tweezers for M2 and M2.5 ship in every screw and set screw case.
- Labels inside and on the lid
- Hex keys and tweezers included
- 12.9 alloy or 304 stainless
From people who opened the case
Reviews from the bench
★★★★★
Great Assortment of Small Metric Screws for Electronics and 3D Printing Projects
This kit has been a great addition to my parts drawer. The assortment of M2 screws, nuts, and washers covers a wide range of common sizes, which makes it really convenient when working on electronics, small repairs, or 3D printing projects. Everything is well organized in the included case, so it’s easy to find the exact size you need without digging through a pile of hardware. The screws appear well made with consistent threads and a durable finish. I’ve used several sizes already and they fit properly without stripping or binding. The hex socket heads are also a nice touch since they’re easier to work with than tiny Phillips screws. For the price and quantity, this kit provides excellent value and saves a lot of time compared to buying individual sizes. If you regularly work with small metric fasteners, this is a very handy assortment to keep on hand.
Weldon Family · March 15, 2026 · 830-Piece M2 Screw Kit, 12.9 Alloy Steel
★★★★★
Has come in handy multiple times
Really happy with the quality and the variety. I had purchased it for one specific project and it was everything I was looking for but since then I have used it on multiple occasions and I’m sure I’ll use it again in the future. Highly recommended to everyone.
Daniel Tomcheck · May 26, 2025 · 485-Piece 304 Stainless Set Screw Kit
★★★★★
I’m genuinely impressed.
I recently purchased the 191 PCS Threaded Inserts for Wood, and I’m honestly impressed! The quality of the inserts is outstanding—they’re well-machined, consistent in size, and made from durable materials that feel built to last. Installation was simple and straightforward, and every insert threaded smoothly without stripping or splitting the wood. Once installed, they hold firmly and provide a strong, reliable connection. The kit includes a great variety of sizes, making it versatile for multiple woodworking projects. Overall, the performance exceeded my expectations, especially at this price. This is an excellent value for anyone looking for a dependable, well-made set of threaded inserts for woodworking, repairs, furniture assembly, or general DIY projects.
Angel Reyes · November 29, 2025 · 191-Piece Threaded Insert Kit for Wood, 10 Sizes
★★★★★
Strong, consistent and great variety
These dowels are great to have around the shop. This kit comes with the most common sizes used. I’ve had a few that had some issues but for the price, these are great. They are strong when used properly. I’ve tested them against some Rockler branded ones and the all seem to break around the same weight. Happy with my purchase. If you typically use a certain size I’d recd just buying that size. These are just nice to have as backups or in case you need an odd size you don’t typically stock in the shop. Also great to toss in your on site toolbox.
Turbeau · January 28, 2026 · 250-Piece Wooden Dowel Pin Kit, 8 Sizes
★★★★★
Great Variety of Eyescrews
The eye screws came in handy and worked well on my large wall frame. They are strong, sturdy and priced right.
Lori Wright · July 26, 2025 · 250-Piece Screw Eye Kit, 9 Sizes
★★★★★
I needed metal threads for a 3d printed project. PERFECT!
Why did you pick this product vs others?: Works perfectly for putting metal threads into plastic!
FuturaForce · July 6, 2025 · Heat-Set Insert Tips M2 to M8, 8 Pieces
Repair notes
All repair notesHow we size, drive and store fasteners
How to choose a metric screw assortment kit
A metric screw assortment kit is only useful if it carries the sizes your repairs actually use. Here is how we decide what goes into a Hapric box, and how to pick the one that matches your bench.
How to install threaded inserts in wood
Threaded inserts for wood turn a tired hole in a chair rail, table legs, a bed frame or a plywood cabinet into a permanent, reusable metal mounting point. The installation takes a drill, a hex wrench and five minutes if the pilot hole is right.
Set screws: 304 stainless steel vs 12.9 alloy, and how to size one
Set screws hold knobs, levers, collars and pulleys to a shaft, and they are the fastener most often missing when something spins free. Two questions decide the right one from a set screw assortment: what steel, and what size.
The whole drawer
A fastener assortment kit for the whole house, sorted the way a workshop sorts it
Metric nut and bolt kits from M2 to M10
We started Hapric to serve the maintenance of household appliances, and the first thing a repair needs is the right screw in the right length. Our metric screw assortment kits cover M2, M2.5, M3, M4, M5, M6, M8 and M10 with socket-head machine screws, hex nuts, flat washers and lock washers in one divider case. The 2,160-piece master kit holds twenty sizes; the single-size cases hold one diameter in up to eight lengths for the bench that only ever needs M3. Flange bolts in grade 8.8 with black oxide cover the motorcycle and mower side of the garage. You will not find carriage bolts, lag screws or a nylon lock nut bin here: this drawer is metric machine hardware, cut in coarse thread to the standard.
Set screws, threaded inserts, dowel pins and more
The same labeled-bin idea runs through the rest of the drawer. Set screw assortments in 304 stainless steel or grade 12.9 alloy steel carry metric and SAE sizes for door hardware, bathroom fittings and pulleys. Threaded inserts for wood come in 1/4-20, 5/16-18 and 3/8-16 with the bolts and hex wrenches to drive them, and brass heat-set tips press inserts into 3D-printed plastic. Hardwood dowel pins, nickel-plated screw eyes and Chicago screws for leather fill out the small hardware a home, a shop and a light industrial service bench reach for every week.
What the label on the lid promises
Every Hapric kit is packed in a thick fixed-divider storage case with size and quantity printed on the lid and inside, the hex key or wrench included, the washer assortment matched to the screws, and the threads checked against the metric standard. Refill by the label, keep the case in the drawer, and the supplies for the next repair are where you left them. That is our principle of maximizing customer interests and creating permanent quality, written small enough to fit on a sticker.
Questions at the counter
Questions at the counter
What is in a fastener assortment kit?
A set of screws, bolts, nuts and washers in several sizes, sorted into a divider case. A Hapric kit adds a label on every compartment and on the lid, the hex key cut to the kit, and in most kits both flat and lock washers, so the case is the whole toolkit for that size.
What does 12.9 mean on a screw?
It is a strength grade. A class 12.9 alloy steel screw has a tensile strength of about 1,200 MPa and yields at 90 percent of that, which makes it the strongest common grade in a metric screw assortment kit; 8.8 and 10.9 are the lower classes. We use 12.9, under black zinc, for our black screw, bolt and set screw kits and 8.8 for the flange bolts.
When should I pick 304 stainless instead?
Anywhere water, salt or steam reaches the fastener: bathroom fittings, boats, outdoor gear, kitchen appliances. 304 stainless steel does not need a coating, so there is nothing to chip and start rust. For dry indoor work the 12.9 alloy kits are stronger and cheaper.
Do the kits include hex keys?
Every screw, bolt and set screw kit ships with hex keys cut to its sizes, and most include tweezers for M2 and M2.5. The 50-piece M8 stainless kit is the exception; it uses a standard 6 mm key you already own.
Are threaded inserts for wood strong?
Yes, when the hole is drilled to the right size. The external knurl bites into pine, plywood or MDF and spreads the load, and the internal machine thread holds a bolt far better than a wood screw in a stripped hole. Our inserts are zinc-plated carbon steel; the bolts are 12.9 alloy.
Which set screw fits a door handle or faucet lever?
Most North American levers take an SAE set screw between 1/8-40 and 1/4-20; imported fixtures often use M3 to M5. Our 25-size metric-and-SAE kits carry both families, each size in its own labeled bag, so you can match the old screw instead of guessing.
Need a size we did not list?
Tell us the machine, the panel or the fixture, and we will point you at the compartment that holds it.