30
Standard Hardware
STANDARD
FASTENER
IDENTIFICATION
CHART
H a r d w a r e s i z e s g i v e n i n t h e
illustrations throughout this
manual.
If a washer or nut is identified as
“washer, 1/2” or “nut, 1/2”, this
means the inside diameter is 1/2
inch
If a screw is identified as “screw,
1/2 x 2”, this means the shaft
diameter is 1/2 inch and the
shaft of the screw is 2 inches
long. If a screw is identified as
“screw, 1/2 - 16 x 2”, the number
“16” means that the screw has
16 threads per inch.
SAMPLE: SCREW IDENTIFICATION
HEX CAPSCREW IDENTIFICATION
Shown below are actual size heads for standard screw sizes.
Example: a 1/4 screw has 7/16 head and thus requires a 7/16
wrench. To measure length, use the scale below.
WASHER AND NUT IDENTIFICATION
Place the washer or nut on the above scale to
determine the inside diameter. The actual inside
diameter can vary 1/16 inch. Use the scale for
comparison.
3/4” Head
screw with
1/2” S.D.
5/8” Head
screw with
7/16” S.D.
9/16” Head
screw with
3/8” S.D.
1/2” Head
screw with
5/16” S.D.
7/16” Head
screw with
1/4” S.D.
HEX CAPSCREW
CARRIAGE BOLT
PLAIN WASHER
LOCKWASHER
NUT
Shaft
Diameter
Shaft
Length
Shaft
Diameter
Screw 1/2 x 2
Scre
w Length
SAMPLE: NUT IDENTIFICATION
Inside
Diameter
Inside
Diameter
Nut, 1/2
0
1
2
3
4
1/4
1/4
1/4
1/4
1/2
1/2
1/2
1/2
3/4
3/4
3/4
3/4
