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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

5/16-18

Grip Range

.331 - .406 in

Identification Mark

3 Rad.

B Ref.

.656 in
a1058_1.jpg

C Max.

.104 in

øD + .000 - .004

.413 in

E Max.

.505 in

F + .005 -.000

.120 in
L ± .0151 1.468 in

K Ref.

.565 in

Install Drill Size Ref.

Z

Install Hole Size Min.

.413 in

Install Hole Size Max.

.423 in

Pull Up Factor

.120 in

Weight per 1000

31.9 lb

Fastening

Uninstalled

Thread Specification

3B per ASME B1.1

Standard Material

Alloy No. 260 Brass

Standard Finish

None - bright as machined

CAD Supplier

PennEngineering® (Atlas®)

Inventory

0
  • 1 The “L” dimension is the height of the installed stud at max grip. The height of the stud will increase if it is installed into thinner material. To calculate “actual L” use this formula: max grip - actual grip + L = “actual L”