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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
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 300 Series Stainless Steel
Standard Finish	N/A Passivated and/or tested per ASTM A380
CAD Supplier	N/A PennEngineering® (Atlas®)
Inventory	N/A {0}

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