Hi-low is a high performance, duel lead thread forming screw for plastic & wood applications, designed with a unique high and low thread. The higher sharper thread has a steep flank angle for positive engagement, lower radial pressure and reduced boss failure. The screw is designed to increase you drive to strip out ratio improving your in-place fastener costs.
- Reduce cracking, splitting and boss breakage
- Increase pull-out strength
- Lower driving, higher strip out torques
Hi-Low Fastener Inch
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Screw Size |
High Thread Diameter |
Low Thread Diameter |
Point Diameter |
Pilot Hole Diameter Flexural Modulus of Plastic |
Pilot Hole Diameter Flexural Modulus of Plastic |
Pilot Hole Thread Cutting Diameter Flexural Modulus of Plastic |
|
|
D |
B |
P |
Up to 200,000 P.S.I . |
200,000-400,000 P.S.I. |
200,000-400,000 P.S.I. |
2-32 |
.084-.090 |
.069 |
.050-.058 |
.067 |
.070 |
.076 |
3-28 |
.095- .105 |
.078 |
.057- .065 |
.073 |
.078 |
.082 |
4-24 |
.105-.115 |
.086 |
.061-.070 |
.081 |
.086 |
.089 |
5-20 |
.119- .125 |
.100 |
.073- .082 |
.093 |
.995 |
.104 |
6-19 |
.135-.145 |
.108 |
.080-.090 |
.101 |
.110 |
.116 |
7-19 |
.148-.158 |
.130 |
.089- .100 |
.120 |
.125 |
.128 |
8-18 |
.160-.170 |
.130 |
.095-.105 |
.120 |
.128 |
.136 |
10-16 |
.185-.195 |
.145 |
.099-.110 |
.136 |
.144 |
.152 |
11-16 |
.198-.210 |
.150 |
.113- .125 |
.149 |
.156 |
.169 |
12-16 |
.210-.220 |
.167 |
.125-.137 |
.157 |
.166 |
.177 |
13-16 |
.220-.230 |
.180 |
.127-.139 |
.169 |
.180 |
.187 |
1/4-15 |
.250-.260 |
.200 |
.161-.175 |
.189 |
.201 |
.218 |
5/16-14 |
.307-.137 |
.250 |
.200-.212 |
.238 |
.250 |
.257 |
