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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 5/16-18 |
Grip Range |
N/A .181 - .256 in |
Identification Mark |
N/A 1 Rad. |
A ± .015 |
N/A .937 in |
B Ref. |
N/A
.656 in
![]() Loading zoom |
C Max. |
N/A .104 in |
øD + .000 - .004 |
N/A .413 in |
E Max. |
N/A .505 in |
F + .005 -.000 |
N/A .120 in |
Install Drill Size Ref. |
N/A Z |
Install Hole Size Min. |
N/A .413 in |
Install Hole Size Max. |
N/A .423 in |
Pull Up Factor |
N/A .120 in |
Weight per 1000 |
N/A 19.3 lb |
Fastening |
N/A Uninstalled |
Thread Specification |
N/A 3B per ASME B1.1 |
Standard Material |
N/A 300 Series Stainless Steel |
Standard Finish |
N/A Passivated and/or tested per ASTM A380 |
CAD Supplier |
N/A PennEngineering® (Atlas®) |
Inventory |