System of Measurement
Flat Head Profile
Thread Direction
Head Diameter
Head Diameter
0.04"
0.061"
0.089"
0.112"
0.118"
0.119"
0.137"
0.138"
0.162"
0.168"
0.172"
0.174"
0.187"
0.197"
0.212"
0.215"
0.224"
0.225"
0.226"
0.237"
0.252"
0.255"
0.262"
0.263"
0.268"
0.279"
0.281"
0.307"
0.312"
0.314"
0.327"
0.332"
0.359"
0.362"
0.363"
0.365"
0.37"
0.385"
0.411"
0.412"
0.422"
0.438"
0.477"
0.493"
0.507"
0.531"
0.597"
0.601"
0.635"
0.656"
0.717"
0.725"
0.729"
0.762"
0.781"
0.815"
0.844"
0.887"
0.937"
0.938"
1.188"
1.374"
1.438"
1.688"
1.938"
2.188"
2.438"
2.938"
0.94 mm
1.42 mm
1.52 mm
1.9 mm
2.3 mm
2.4 mm
2.5 mm
2.6 mm
3 mm
3.65 mm
3.78 mm
3.8 mm
4 mm
4.4 mm
4.7 mm
5 mm
5.5 mm
5.59 mm
5.6 mm
6 mm
6.02 mm
6.3 mm
6.4 mm
6.5 mm
6.7 mm
6.71 mm
6.72 mm
7 mm
7.5 mm
8 mm
8.2 mm
8.4 mm
8.9 mm
8.94 mm
8.96 mm
9.03 mm
9.1 mm
9.19 mm
9.2 mm
9.3 mm
9.4 mm
9.95 mm
10 mm
10.2 mm
10.4 mm
11 mm
11.2 mm
11.3 mm
11.94 mm
12 mm
12.06 mm
12.6 mm
13.4 mm
13.43 mm
13.44 mm
13.5 mm
14.5 mm
15.8 mm
16 mm
16.5 mm
17.3 mm
17.91 mm
18 mm
20 mm
22 mm
24 mm
27 mm
30 mm
33 mm
36 mm
39 mm
49 mm
Head Height
Head Height
0.011"
0.016"
0.025"
0.026"
0.028"
0.031"
0.033"
0.035"
0.036"
0.037"
0.038"
0.042"
0.043"
0.044"
0.047"
0.048"
0.049"
0.051"
0.053"
0.054"
0.059"
0.06"
0.064"
0.066"
0.067"
0.068"
0.07"
0.072"
0.073"
0.075"
0.076"
0.078"
0.081"
0.082"
0.083"
0.084"
0.089"
0.09"
0.092"
0.094"
0.096"
0.097"
0.099"
0.1"
0.105"
0.107"
0.11"
0.112"
0.116"
0.12"
0.127"
0.132"
0.134"
0.135"
0.138"
0.153"
0.156"
0.157"
0.161"
0.165"
0.181"
0.191"
0.198"
0.223"
0.23"
0.234"
0.251"
0.324"
0.396"
0.468"
0.54"
0.611"
0.683"
0.827"
0.28 mm
0.38 mm
0.41 mm
0.5 mm
0.6 mm
0.7 mm
0.72 mm
0.8 mm
0.84 mm
0.9 mm
0.96 mm
1.2 mm
1.3 mm
1.35 mm
1.5 mm
1.6 mm
1.65 mm
1.7 mm
1.8 mm
1.85 mm
1.86 mm
1.9 mm
1.93 mm
2 mm
2.1 mm
2.2 mm
2.3 mm
2.4 mm
2.48 mm
2.5 mm
2.6 mm
2.7 mm
2.8 mm
2.9 mm
3 mm
3.1 mm
3.2 mm
3.3 mm
3.4 mm
3.5 mm
3.72 mm
3.8 mm
4 mm
4.1 mm
4.2 mm
4.4 mm
4.6 mm
4.65 mm
4.95 mm
5 mm
5.5 mm
6 mm
6.5 mm
7 mm
7.5 mm
8 mm
8.5 mm
14 mm
19.6 mm
Thread Spacing
Product Categories Screws and Bolts / Flat Head Screws

Flat Head Screws

6224 Products
Hex Drive Flat Head Screws
Hex Drive Flat Head Screws
Phillips Flat Head Screws
Phillips Flat Head Screws
Torx Flat Head Screws
Torx Flat Head Screws
A Torx drive has more points of contact than other drives—allowing you to tighten the screw without damaging the recess.
Slotted Flat Head Screws
Slotted Flat Head Screws
Tamper-Resistant Flat Head Screws
Tamper-Resistant Flat Head Screws
Difficult to remove without special tools, use these screws in public spaces to reduce the risk of theft and tampering.
Vibration-Resistant Flat Head Screws
Vibration-Resistant Flat Head Screws
A nylon patch bonded to the threads adds friction to resist loosening.
Sealing Flat Head Screws
Sealing Flat Head Screws
A rubber O-ring prevents leaks and seals out contaminants.
Vented Flat Head Screws
Vented Flat Head Screws
These screws are drilled through the shaft to vent fluid and gases trapped under the screw.
Left-Hand Threaded Flat Head Screws
Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion.
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