Use a pronged stud in place of a cap for a double-sided connector that can be snapped in the middle of 2 regular snap pieces, or stacked for infinite snapping.
Size 20 KAM Snap Parts: Caps/Sockets/Studs – I Like Big Buttons!
KAM Snaps 100 Sets LONG PRONG Size 20 prong Length 6.2 Mm Kam® Plastic Snaps for Key Chains/embroidery/sewing/snap Tabs/marine Vinyl
KAM Plastic Snaps Size 20 Parts Caps Sockets Studs B53 Peach - KAMsnaps®
Size 20 KAM Snap Parts: Caps/Sockets/Studs – I Like Big Buttons!
KAM Plastic Snaps Size 20 Parts Caps Sockets Studs B33 Azalea Pink - KAMsnaps®
WedDecor 1000 Sets 15mm Snap Fasteners Press Studs Heavy Duty Metal Nickle Free 4 Parts Rivets Button for Leather Crafts, Jackets, Bags, Straps, Jeans, Clothes Repair- Light Green
KAM Snaps 400 Darks Sets (40 Colors) + Snap Pliers/Awl Combo Kit - I Like Big Buttons! - for Size 20/T5 No-Sew Buttons Fasteners, Plastic Snaps, Clothes, Cloth Diapers, Button, Mama
Original KAM Snaps Starter Fasteners Kit -360pcs KAMsnaps Size 20 + Snap Pliers for Crafts Clothing : Arts, Crafts & Sewing
Pronged Stud Tutorial: Stackable KAM Plastic Snaps by I Like Big Butto – I Like Big Buttons!