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- Designed for high load applications. Available with rib, key or full hex features for high torque applications.
- Both UNC and UNF threads available in No. 10 and larger thread sizes. Check for availability of other grip ranges and designs.
Unit of Measure
Thread Size |
N/A 1/4-20 |
Grip Range |
N/A .320 - .380 in |
Identification Mark |
N/A 5 Rad. |
B ± .015 |
N/A
.475 in
Loading zoom |
C Nom. |
N/A .058 in |
øD + .000 - .004 |
N/A .332 in |
E Max. |
N/A .382 in |
F + .005 -.000 |
N/A .054 in |
G Max. |
N/A .035 in |
L ± .015 |
N/A 1.25 in |
K Ref. |
N/A .445 in |
P - Keyway Width + .003 -.000 |
N/A .062 in |
H - Keyway Height |
N/A .056 - .058 in |
Install Drill Size Ref. |
N/A Q |
Install Hole Size Min. |
N/A .332 in |
Install Hole Size Max. |
N/A .338 in |
Pull Up Factor |
N/A .095 in |
Weight per 1000 |
N/A 4.1 lb |
Fastening |
N/A Uninstalled |
Thread Specification |
N/A 3B per ASME B1.1 |
Standard Material |
N/A 6053 Aluminum or 6061 Aluminum |
Standard Finish |
N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant |
CAD Supplier |
N/A PennEngineering® (Atlas®) |