1. a. Item has external threads Go to 2 (screws)

b. Item has no external threadsGo to 7

2. a. Item has a pointy tipGo to 3

b. Item does not have a pointy tipGo to 5

3. a. Item has a flat topFlat head wood screw

b. Item doesn’t have a flat topGo to 4

4. a. Item has an oval headOval head wood screw

b. Item has a round headRound head wood screw

5. a. Item has a flat headFlat head machine screw

b. Item doesn’t have a flat headGo to 6

6. a. Item has an oval headOval head machine screw

b. Item has a round headRound head machine screw

7. a. Item has internal threadsGo to 8 (nuts)

b. Item has no internal threadsGo to 11 (nails)

8. a. Item has wingsWing nut

b. Item has no wingsGo to 9

9. a. Item has a capCap nut

b. Item doesn’t have a capGo to 10

10. a. Looking down on the hole item is 4 sidedSquare nut

b. Looking down on the hole item is six sidedHex nut

11. a. Item has a tapered headCasing nail

b. Item doesn’t have a tapered headGo to 12

12. a. Item has a large flat headRoofing nail

b. Item doesn’t have a large flat headGo to 13

13. a. Item has a small flat headCommon wire nail

b. Item has a disc below it’s headScaffold nail

Casing nail

Flathead machine screw

Common wire nails

Cap nut

Flathead wood screw

Roofing nail

Square nut

Oval head wood screw

Round head wood screw

Wing nut

Hex Nut

Oval head machine screw

Scaffold nail

Round head machine screw