Kozelo 10 pack Socket Head Cap Screws 1/4"-20 x 3/4" UNC 304 Stainless Steel (Allen drive)
Product description
If you need a small, dependable set of stainless Allen socket cap screws, this Kozelo 10 pack is the sort of thing that quietly solves a lot of “missing fastener” problems. It’s aimed at practical assemblies where corrosion resistance matters, and where an Allen (hex socket) drive makes installation straightforward.
That said, it’s not a universal fix. Socket cap screws live and die by the right thread and length, so getting the sizing spot on before you order really matters.
The essentials
This is a 10-piece pack of socket head cap screws made from 304 stainless steel, supplied with a thread size of 1/4"-20 UNC and a thread length of 3/4". The head measures 0.375" in diameter with a thickness of 0.25", and the hexagon width is 3/16"—all details worth checking against your application.
From the way they’re described, these are designed for general mechanical fastening: connecting parts, holding components in place, and supporting stable operation. You’ll also see similar screws used in contexts like 3D printers, RC plane setups, home appliances, engines and engine-related builds, lathes, chassis and seats, and a broad range of equipment where you want a neat fastener profile.
Key features
The headline benefit here is the 304 stainless steel material. On paper, it offers improved corrosion resistance and is positioned as a durable, long-lasting option. There’s also an emphasis on strength and temperature resistance, plus hygienic properties and an aesthetic appearance—useful if the screws will be visible or exposed to everyday conditions.
Drive-wise, these are Allen socket (hex socket drive) screws. That typically suits builds where you can access the screw head and tighten using the right Allen key, rather than needing a spanner.
Where they shine (and where they may feel limiting)
If your main goal is a corrosion-resistant replacement screw for a machine, tool, electronics enclosure or small mechanical assembly, this pack makes sense. It’s also a decent “keep a few spares” option because the bundle size is clear: 10 screws rather than a huge bulk quantity.
But there’s one limitation to keep in mind: this is a specific size (1/4"-20 UNC x 3/4"). If your existing hardware uses a different thread pitch or a different length, these won’t magically fit. And in real life, it can be annoying when you’ve already stripped the original, only to find the replacement doesn’t match.
It also mentions performance in moderate temperatures and low corrosion risk areas. If you’re dealing with harsher environments, you’ll want to be a bit more cautious and confirm the suitability for your exact setup.
What to check before you buy
A small checklist helps here, because socket cap screws are unforgiving about fit:
- Confirm the thread: this pack is 1/4"-20 UNC.
- Confirm the length: the thread length is 3/4".
- Check head fit: head diameter (0.375") and head thickness (0.25") can matter if you’re working with tight clearances.
- Make sure the hexagon width (3/16") matches the Allen key you’ll use.
The guidance given is to use a caliper and/or gauge checker for measurement, and to avoid relying on a ruler or tape measure. That’s sensible: small differences can turn a “quick replacement” into a rework job.
Everyday use ideas
Picture a 3D printer fan mount where an original screw has loosened or shows early corrosion. With the right thread size and length confirmed, you can swap in one of these stainless Allen socket screws to bring the assembly back into firm alignment. Because the head is compact and designed for socket-drive tightening, it’s often easier to handle in tight spaces than larger external-head fasteners.
Or think about an engine-related replacement where you want consistent mechanical fastening without worrying so much about rust over time.
Final verdict
It’s a solid choice if you specifically need 304 stainless Allen socket cap screws in 1/4"-20 UNC and 3/4" thread length, especially for setups where corrosion resistance is worth paying attention to.
You may want to skip it if you’re not sure about the thread type/length, or if your application has tight clearance around the head diameter and thickness—because these measurements are fixed.
So overall: it’s “worth considering” for correct-size replacements and small mechanical assemblies, but don’t treat it as a generic spare unless you’ve measured and matched what you’re replacing.
Mini FAQ
FAQ
Are these screws stainless steel?
Yes. They’re described as 304 stainless steel for corrosion resistance and durability.
What size are they?
The thread size is 1/4"-20 UNC and the thread length is 3/4".
How many are included?
You get 10 screws in the pack.
What tools should I use to confirm the size?
The guidance is to use a caliper and/or gauge checker, rather than relying on a ruler or tape measure.
What applications are they suited to?
They’re described as suitable for machinery fastening and a wide range of practical uses, including 3D printing, RC plane builds, home appliances, engines, lathes, chassis components and similar assemblies.