1. Necklaces: Spring bolt clasps are often used to fasten necklaces. They can be attached to the ends of chains, cords, or other types of jewelry strands to secure the necklace around the wearer's neck.

2. Bracelets: Spring bolt clasps are also commonly used to fasten bracelets. They can be attached to the ends of beaded or chain bracelets to keep the bracelet securely fastened on the wearer's wrist.

3. Anklets: Similar to bracelets, spring bolt clasps can be used to fasten anklets, keeping the piece of jewelry securely attached to the wearer's ankle.

4. Keychains: Spring bolt clasps can also be used to create keychains. They are attached to a ring or loop and used to secure keys or other small items.

5. Earrings: While less common, spring bolt clasps can also be used to fasten earrings. They are typically attached to the back of an earring post or hook and used to secure the earring in the wearer's ear.

Overall, spring bolt clasps are versatile and widely used jewelry findings that can be incorporated into many different types of jewelry designs.