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creates a flat-bottom recess around a hole so a screw head can sit below or flush with the surface of the part. This is most commonly used for standard socket head cap screws (SHCS) and other machine screws where the head needs clearance from a mating part, moving assembly, or finished outside surface.",[520,524,525],{},"Unlike countersinking, counterboring keeps a cylindrical wall and flat shoulder for the screw head instead of a tapered seat. Use it when your hardware has a cylindrical head or when you need a predictable head pocket depth.",[527,528,530],"h2",{"id":529},"counterbore-sizes","Counterbore Sizes",[532,533,535],"callout",{"color":534,"icon":46},"primary",[520,536,537,538,542],{},"You can order a counterbore of ",[539,540,541],"strong",{},"any"," depth when the body diameter and pilot diameter match one of the sizes below. Upload a STEP file with the counterbores drawn directly in your model.",[520,544,545],{},"The sizes below are the supported counterbore dimensions for common socket head cap screws. Counterbores must be modeled directly in your STEP file; they cannot be added from the hole operations selector.",[547,548,550],"h3",{"id":549},"inch","Inch",[552,553,554,571],"table",{},[555,556,557],"thead",{},[558,559,560,564,568],"tr",{},[561,562,563],"th",{},"For screw size",[561,565,567],{"align":566},"right","Body dia.",[561,569,570],{"align":566},"Pilot dia.",[572,573,574,591,606,621,635,650],"tbody",{},[558,575,576,580,586],{},[577,578,579],"td",{},"#4",[577,581,582],{"align":566},[583,584,585],"code",{},"0.206\"",[577,587,588],{"align":566},[583,589,590],{},"0.128\"",[558,592,593,596,601],{},[577,594,595],{},"#6",[577,597,598],{"align":566},[583,599,600],{},"0.244\"",[577,602,603],{"align":566},[583,604,605],{},"0.154\"",[558,607,608,611,616],{},[577,609,610],{},"#8",[577,612,613],{"align":566},[583,614,615],{},"0.288\"",[577,617,618],{"align":566},[583,619,620],{},"0.180\"",[558,622,623,626,631],{},[577,624,625],{},"#10",[577,627,628],{"align":566},[583,629,630],{},"0.330\"",[577,632,633],{"align":566},[583,634,585],{},[558,636,637,640,645],{},[577,638,639],{},"1\u002F4\"",[577,641,642],{"align":566},[583,643,644],{},"0.398\"",[577,646,647],{"align":566},[583,648,649],{},"0.266\"",[558,651,652,655,660],{},[577,653,654],{},"5\u002F16\"",[577,656,657],{"align":566},[583,658,659],{},"0.491\"",[577,661,662],{"align":566},[583,663,664],{},"0.328\"",[547,666,668],{"id":667},"metric","Metric",[552,670,671,681],{},[555,672,673],{},[558,674,675,677,679],{},[561,676,563],{},[561,678,567],{"align":566},[561,680,570],{"align":566},[572,682,683,698,713,728,743],{},[558,684,685,688,693],{},[577,686,687],{},"M3",[577,689,690],{"align":566},[583,691,692],{},"6.0 mm",[577,694,695],{"align":566},[583,696,697],{},"3.5 mm",[558,699,700,703,708],{},[577,701,702],{},"M4",[577,704,705],{"align":566},[583,706,707],{},"7.5 mm",[577,709,710],{"align":566},[583,711,712],{},"4.5 mm",[558,714,715,718,723],{},[577,716,717],{},"M5",[577,719,720],{"align":566},[583,721,722],{},"9.0 mm",[577,724,725],{"align":566},[583,726,727],{},"5.5 mm",[558,729,730,733,738],{},[577,731,732],{},"M6",[577,734,735],{"align":566},[583,736,737],{},"10.5 mm",[577,739,740],{"align":566},[583,741,742],{},"6.5 mm",[558,744,745,748,753],{},[577,746,747],{},"M8",[577,749,750],{"align":566},[583,751,752],{},"13.5 mm",[577,754,755],{"align":566},[583,756,757],{},"8.5 mm",[527,759,761],{"id":760},"depth-tolerance","Depth Tolerance",[520,763,764,765,768],{},"All counterbores are cut to a depth tolerance of ",[583,766,767],{},"+.015\" \u002F -.000\"",".",{"title":770,"searchDepth":771,"depth":771,"links":772},"",2,[773,778],{"id":529,"depth":771,"text":530,"children":774},[775,777],{"id":549,"depth":776,"text":550},3,{"id":667,"depth":776,"text":668},{"id":760,"depth":771,"text":761},"Counterboring creates a flat-bottom recess for socket head cap screws and other machine screw heads.","md",{},{"icon":90},"Counterboring Guidelines",{"title":87,"description":779},{"loc":88},"sPouraVc27V8HysaTwYNBcUCp2TASHGk8yb5oRsBAio",[788,790],{"title":24,"path":84,"stem":85,"description":789,"icon":27,"children":-1},"Countersinking is a method of creating a conical hole in a sheet metal piece, allowing for the flush attachment of fasteners like screws or bolts.",{"title":29,"path":92,"stem":93,"description":791,"icon":32,"children":-1},"Tapping is a method of creating internal threads in pre-cut holes of a sheet metal piece, allowing for secure attachment of threaded components like screws or bolts.",1781204319349]