Basic FRC Building
Shank Types
The Shank of a Bolt
 Machine Screw and Hex Bolt: Fully Threaded, Flat End
Sheet Metal Screws: Fully Threaded, Pointed End
Self-Drilling Sheet Metal Screws: Partially Threaded, Pointed End
Drive and Driver Head Shapes
| Phillips (Frearson) Head |
Slotted/Flat |
Hex/Allen |
TORX |
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Nut Types
| Hex |
Nylon |
Star |
Wing |
Jam |
Coupling |
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Locknut |
Locknut |
Hand-Tightening |
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Connector |
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Washer Types
| Cut/Flat Washer |
Lock Washer |
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TORX Nomenclature
Screwdrivers: capital letter "T" followed by a number ranging from 1 to 100 [T#]
 The number represents the point-to-point distance
(the distance across widest span of the 6-pointed-star shape)
The higher the number, the larger the star-shaped head
Wrench Nomenclature
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Open Wrench: good in tight spaces because it can easily be taken on and off
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Closed Wrench: good for larger spaces, especially those at blind and awkward-to-reach angles |
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Ratcheting/Ratchet Wrench: closed wrench with ratcheting mechanism on the inner-circumference; flip over to reverse ratcheting direction |
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Socket Wrench/Ratchet: wrench-like handle with interchangable ratcheting sockets (of differing sizes), making removing and repositioning unnecessary; toggle on the back switches ratcheting direction
Ratcheting
allows the wrench to return to the starting position without removal
and without undoing previous work, the same goes for all ratchets,
including the ratcheting wrench above.
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Nutdriver: driver ending in a socket, usually with a hollow shaft that allows the nut to continue farther along the bolt shank
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Allen Wrench:
a hexagonal shaft that's more inline with the conventional idea of a
screwdriver, as it fits inside the indent in the bolt head, instead of
around the entire bolt head |
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T-Handle: Allen wrench with a long shaft ending in a T-shaped handle to reach long distances |
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L-Handle:
Allen wrench with a bent shaft shaped like an L for longer and
shorter distances by holding the short and long side of the L,
respectively
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Tightening/Losening Directions
| Clockwise: in, tighter, away |
Counterclockwise: out, looser, towards |
Righty-Tighty, Lefty-Losey
Right-Hand Rule: using the right hand, make a circle with the fingers, holding the thumb perpendicular
1) Clockwise: curling the fingers clockwise (turn the hand around to face right), and the thumb points out
2) Counter-Clockwise: curl the fingers counter-clockwise, the thumb points in
3) Point-to-Point: curl the fingers from point A to point B and watch which way the thumb points
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