How to Set Rivets in Leather
Set cap rivets that seat tight and stay put, using the right length, a punched hole, and a hard surface under your setter.
Quick answer
To set a rivet in leather, punch a clean hole sized to the post, push the post up through your stacked layers, and seat the cap on top. Rest the cap on a steel anvil or bench block, place the domed setter over it, and strike the setter squarely with one or two firm mallet blows. A properly sized rivet locks tight with no wobble and no bent post.
Rivets are the fastest permanent fastener in leatherwork: no stitching, no glue cure time, just punch, seat, and strike. Cap rivets (also called double-cap rivets) are the go-to for bags, belts, dog collars, and sheaths because both faces look finished. The catch is that a rivet only holds well when its length matches your leather stack and the hole fits the post. Get either wrong and the post bends over inside the hole instead of flaring into the cap.
This guide walks through installing cap rivets by hand with a setter and mallet. If your project mixes rivets with hardware you might unscrew later, compare options in our rivets and setters guide and our rivet and Chicago screw calculator before you commit to a permanent fastener.
Rivet types: cap rivets, tubular, and Chicago screws
Not every rivet installs the same way, so know what is in your hand:
- Double-cap rivets are the beginner default. A post piece and a cap piece snap together over your leather, and both sides show a smooth dome. Best for anything visible on both faces.
- Single-cap (rapid) rivets have a finished dome on one side and a flat, slightly rough burr on the back. Fine when only one face shows.
- Tubular and copper rivets use a hollow or solid shank that you flare or peen with a burr and washer. They are stronger for heavy work like saddlery but need more skill to set cleanly.
- Chicago screws are not struck at all; they thread together and can be unscrewed. Reach for these when you may need to disassemble the piece. See the calculator to size them.
This guide focuses on setting cap rivets, since that is what most beginners buy first.
Choosing the right rivet size and post length
Rivet sizing has two numbers: cap diameter (how big the dome looks, usually 7-9 mm) and post length (how far the shank sticks up, typically 4-12 mm / roughly 3/16 to 1/2 in). Cap diameter is cosmetic; post length is what makes or breaks the set.
The rule: the post should clear your stacked leather by about the thickness of the cap's internal dome, roughly 1/16 to 1/8 in (1.5-3 mm). Too short and the cap will not grip; too long and the post buckles sideways instead of seating.
Measure your total stack first. If your leather is labeled in ounces, convert it with our leather thickness converter (each ounce is about 1/64 in, or 0.4 mm), then feed the stack into the rivet calculator to get a target post length. As a landmark: two layers of 8 oz veg-tan is about 1/4 in (6.4 mm), which wants roughly an 8-9 mm post.
Tools needed to install rivets in leather
You do not need much, but each piece matters:
- Hole punch sized to the post, not the cap. A rotary punch or a set of drive punches works; see our hole punch set picks.
- Rivet setter with a concave (domed) tip matched to your cap diameter. A flat punch will flatten the dome and ruin the look.
- An anvil, steel bench block, or granite slab. The harder the surface, the better the flare.
- A poly or rawhide mallet. Avoid a steel hammer directly on the setter; it chews the tip and can mar the cap.
A concave anvil block (a small steel plate with a dished depression) protects the bottom cap's dome while you strike the top. If you are also setting snaps or building a starter kit, our essential tools guide covers what overlaps.
Common mistakes when setting cap rivets
Almost every failed rivet traces back to one of these:
- Post too long: the shank has nowhere to go, so it bends over inside instead of flaring, leaving a loose, rattly rivet. Shorten the post or add a layer.
- Hole too big: the post floats and the rivet spins even after setting. Punch to the post diameter, not larger.
- Hole too small: forcing the post distorts the leather and cants the cap. It should slide in with light pressure.
- Soft surface underneath: setting on wood, a cutting mat, or a workbench absorbs your blow, so the cap never fully seats. Use steel or stone.
- Off-axis strike: tilting the setter flares the post unevenly and the cap pops off later. Hold the setter vertical and hit straight down.
- Timid tapping: many light taps work-harden and mushroom the post badly. One or two committed blows set cleaner than ten soft ones.
Step by step
- Choose rivet length. Measure your total stacked leather thickness and pick a post that clears it by about 1/16-1/8 in (1.5-3 mm), using the rivet calculator at /tools/rivet-chicago-screw-calculator/ to confirm.
- Punch the hole. Punch a clean hole sized to the rivet post (not the cap) so the shank slides in snugly with no forcing and no slop.
- Insert post and cap. Push the post up through all layers from the back, then seat the domed cap onto the exposed post so it clicks into place.
- Place on a hard surface. Rest the assembly cap-down on a steel anvil, bench block, or granite slab so the bottom dome is supported and the blow transfers fully.
- Position the setter. Set the concave tip of the rivet setter over the top cap and hold it perfectly vertical, centered on the dome.
- Strike squarely. Deliver one or two firm, straight-down blows with a poly or rawhide mallet to flare the post inside the cap.
- Check it is tight. Twist and tug the rivet; a good set will not spin, wobble, or lift, and both caps sit flush against the leather.
Rivets & setters
-
Double-Cap Rivets Assortment
- Size
- 6/8/9/10/12 mm posts
- Level
- Beginner
Two capped faces for a finished look both sides. Post length must match your leather stack — see the rivet calculator.
-
Rapid / Single-Cap Rivets
- Size
- assorted
- Level
- Beginner
One capped face, one flat — quick and cheap for hidden joins. Set on a hard surface with the matching tool.
-
Rivet Setter + Anvil
- Size
- setter + concave anvil
- Level
- Beginner
The concave anvil and domed setter shape the cap without flattening it. Match the setter size to the rivet cap.
-
Chicago Screws Assortment
- Size
- 4-12 mm barrels
- Level
- Beginner
Screw-together posts for removable, no-tools joins — ideal for straps you may adjust. Barrel length ≈ your leather stack.
Key takeaways
- Post length is everything: aim for about 1/16-1/8 in (1.5-3 mm) of post above your leather stack before setting.
- Punch to the post, set on steel: a snug hole and a hard anvil are what let the cap flare and lock tight.
- Strike square and commit: one or two firm vertical blows beat a flurry of timid taps every time.
- Measure first: convert your leather weight and check post length with the rivet calculator before buying a size.
Frequently asked questions
What length rivet do I need for leather?
Pick a post that sits about 1/16 to 1/8 in (1.5-3 mm) above your stacked leather, so the shank has just enough length to flare into the cap without bending. Measure the total thickness of all layers first, convert from ounces if needed with our thickness converter, then confirm the post length with the rivet calculator.
Why does my rivet keep bending instead of setting?
A bent post almost always means the rivet is too long for your leather stack. With nowhere to go, the shank folds over inside the cap instead of flaring, leaving it loose. Switch to a shorter post or add a layer of leather. Check your target length against our rivet calculator.
Can I set rivets without a special setter?
You can improvise in a pinch by tapping the cap gently with a flat punch over a hard surface, but you risk flattening or cracking the dome and getting an ugly, uneven set. A matched concave setter is inexpensive and makes clean results repeatable, so it is worth having before your first real project.
What surface should I set rivets on?
Use the hardest surface you have: a steel anvil, a steel bench block, or a granite slab. Soft surfaces like wood, a cutting mat, or a bare workbench absorb your mallet blow so the cap never fully seats. A small dished anvil block also protects the bottom cap's dome while you strike the top.
How do I know when a rivet is set correctly?
Twist and pull on it. A correctly set rivet does not spin, wobble, or lift, and both caps sit flush and even against the leather with clean domes. If it rattles or the post shows through, the fit or length was off. For projects you may want to open later, consider Chicago screws instead, sized with our calculator.
What size hole do I punch for a rivet?
Punch to the diameter of the rivet post, not the cap. The post should slide through with light pressure and no slop. Too large and the rivet spins after setting; too small and you distort the leather and cant the cap. Most cap rivets use a hole around 3/32 to 1/8 in (2.5-3 mm), but match your specific rivet.
Last verified 2026-07-15.