This Standard covers the complete general, dimensional, andperformance requirements for the various types of slotted andrecessed head metric tapping screws recognized as standard. Alsoincluded are appendices that provide specifications andinstructions for protrusion gaging of flat countersunk head screws,across-corners gaging of hex head screws, and penetration andwobble gaging of recessed head screws. The appendices in thisStandard also provide clearance hole size and approximateinstallation hole size recommendations. The inclusion ofdimensional data in this Standard is not intended to imply that allof the products described are stock production sizes. Consumers should consult with manufacturers concerning theavailability of products.