Specification Brand : Sammy's BulletPoint1 : Two step Installation process; No Custom bracket As sembly Required BulletPoint2 : Reduces Installation time and cost; provides more attachment locations BulletPoint3 : Attaches to angled, bottom or side of steel elements; Made in Usa BulletPoint4 : Expands to provide direct attachment to Hang plumb in extreme roof pitches BulletPoint5 : Thin gauge purlin; No pRedrilling Required; Easy-To-Install BulletPoint6 : Kindly remind: if unit can't satisfy you, please contact my team first for solve your issues. Color : Zinc DriveSystem : Screw DriveSystem1 : External Hex DriveSystem2 : Slotted ExteriorFinish : Alloy Steel ExternallyAssignedProductIdentifier1 : 804595137109 ExternallyAssignedProductIdentifier2 : 0804595137109 ExternallyAssignedProductIdentifier3 : 00804595137109 GpsrSafetyAttestation : 1 GradeRating : Standard ItemName : Everflow Sammys 8150922-50 XP 20 3/8 Inch Screw Vertical Expandable Threaded Rod Anchor, Designed for Pipe Hanger, Thin Gauge Purlin, No-Predrilling Required, Steel w/ Electro-Zinc Finish (Pack of 50) ItemPackageDimensions_Height : 27.9908 centimeters ItemPackageDimensions_Length : 8.509 centimeters ItemPackageDimensions_Width : 8.6106 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : self-drilling-screws Manufacturer : Sammys Material : steel Material1 : Stainless Steel Material2 : Zinc Material3 : Alloy Steel Material4 : Faux Leather Material5 : Faux Leather MeasurementSystem : Imperial MetalType : Alloy Steel MetalType1 : Alloy Steel MetalType2 : Zinc ModelName : XP 20 ModelNumber : 8150922-50 NumberOfBoxes : 1 NumberOfItems : 2 NumberOfPieces : 50 PackageLevel : unit PartNumber : 8150922-50 Pattern : Screw ProductDescription : Countersunk socket cap screws: Countersunk hex bolts are widely used in applications that require high aesthetics and high torque, such as joints that require compact structure and smooth appearance. They can replace hexagonal bolts and have high connection strength and greater torque capacity.