Catalog
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- Designed for high load applications. Countersunk feature allow fastener to be installed flush with sheet surface.
- 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 .211 - .271 in |
Identification Mark |
N/A 2 Rad. |
A ± .015 |
N/A .812 in |
B Ref. |
N/A
.529 in
Loading zoom |
C Max. |
N/A .089 in |
øD + .000 - .004 |
N/A .332 in |
E Max. |
N/A .382 in |
F + .005 -.000 |
N/A .054 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 10.9 lb |
Fastening |
N/A Uninstalled |
Thread Specification |
N/A 3B per ASME B1.1 |
Standard Material |
N/A Low Carbon Steel |
Standard Finish |
N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II |
CAD Supplier |
N/A PennEngineering® (Atlas®) |