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Type of Screw Head
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ROUND
FLAT
PAN
TRUSS
OVAL
BINDING
CHESE
HEXAGON
PAN WASHER
HEXAGON WASHER
Type of Screw Recesse
 
PHILIPS RECESSE
POZIDRIVE RECESSE
SLOTTED OR CROSS RECESSE
SLOTTED
SLOTTED & SQUARE SOCKET
SQUARE SOCKET
HEXAGON RECESSE
INDENTED HEXAGON
Type of Screw Thread
 
x c c x c x c
A
B
C
BT
U
BF
PT
Standard size measurement of the lenght of screws
x x x x
ROUND HEAD
PAN HEAD
OVAL HEAD
FLAT HEAD
 
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