27.3. Countersunk head rivet
27.4. Raised countersunk head rivet
27.5. Shallow raised countersunk head rivet
27.6. Flat head rivet
27.7. Round head hollow rivet
27.8. Flat head hollow rivet
27.9. Countersunk head hollow rivet
27.10. Flat head semi-hollow rivet
27.11. Countersunk head semi-hollow rivet
27.12. Round head semi-hollow rivet
28.1. Hexagon nut
28.2. Hexagon thin nut
28.3. Hexagon nut with collar
28.4. Hexagon nut with flange
28.5. Washer faced hexagon nut
28.6. Hexagon weld nut
28.7. Square nut
28.8. Square thin nut without chamfer
28.9. Foundation nut
28.10. Square nut with collar
28.11. Square weld nut
28.12. Triangle nut with collar
28.13. Octagon nut
28.14. 12point flange nut
28.15. Prevalling torque type hexagon nut with deformed thread
28.16. Prevalling torque type hexagon nut with ring polymer insert
28.17. Hexagon slotted nut
28.18. Hexagon castle nut
28.19. Hexagon thin castle nut
28.20. Acorn nut
28.21. Knurled nut
28.22. Slotted round nut
28.23. Slotted round nut for hook-spanner
28.24. Round nut with set pin holes in side
28.25. Round nut with drilled holes in one face
28.26. Wing nut
29.1. Plain washer
29.2. Square washer with round hole
29.3. Round washer with square hole
29.4. Square taper washer
29.5. Single coil spring lock washer with square ends
29.6. Single coil spring lock washer with tang ends
29.7. Double coil spring lock washer
29.8. Curvet spring washer
29.9. Serrated lock washer external teeth
29.10. Serrated lock washer internal teeth
29.11. Countersunk serrated external toothed lock washer
29.12. Wave spring washer
29.13. Lock washer external teeth
29.14. Lock washer internal teeth