CAD (0) ▾ Cart is empty Request CAD files All Categories > ATLAS® Brand Rivet Nuts > Atlas MaxTite® Rivet Nuts > Countersunk Head > Countersunk Head Threaded Insert - Open End Keyed - Unified > Part # AENM31K556 All CategoriesAll Categories ATLAS® Brand Rivet NutsATLAS® Brand Rivet Nuts Atlas MaxTite® Rivet NutsAtlas MaxTite® Rivet Nuts Countersunk HeadCountersunk Head Countersunk Head Threaded Insert - Open End Keyed - UnifiedCountersunk Head Threaded Insert - Open End Keyed - Unified Part # AENM31K556 Part # AENM31K556, Countersunk Head Threaded Insert - Open End Keyed - Unified AENM31K556Countersunk Head Threaded Insert - Open End Keyed - Unified Request Information Add to CAD Cart Email This Page Download PDF Download PDF Printable Page VIEW CAD DRAWING 3D 2D Front View 2D Left Side View 2D Sales Drawing DOWNLOADS PEM ATLAS Bulletin /Asset/Countersunk_1.jpg 12 /Asset/Countersunk_1.jpg Close Window 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 Imperial Metric Both Specifications Thread Size N/A 5/16-18 Grip Range N/A .481 - .556 in Identification Mark N/A 5 Rad. B Ref. N/A .656 in 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 M Ref. N/A .575 in P - Keyway Width + .003 -.000 N/A .128 in H - Keyway Height N/A .097 - .102 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 N/A 23.7 lb Fastening N/A Installed 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®)