Specification Brand : HH FASTENERS BulletPoint1 : Fastener Type: Machine Screw BulletPoint2 : Drive Type: Phillips BulletPoint3 : Head Style: Flat/Countersunk Head BulletPoint4 : Thread Diameter: #4 BulletPoint5 : Thread Pitch: 40 Color : Silver CustomerPackageType : Standard Packaging DriveSystem : Phillips ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 0767550615497 ExternallyAssignedProductIdentifier2 : 767550615497 ExternallyAssignedProductIdentifier3 : 00008236043754 GpsrSafetyAttestation : 1 GradeRating : 18-8 ItemDisplayWeight : 0.5 pounds ItemName : #4-40 Phillips Flat/Countersunk Head Machine Screws,A2 Stainless Steel,Thread Length 3/16" to 1-1/2",Pack 100-piece (#4-40 x 1-1/2") ItemPackageDimensions_Height : 11.7 centimeters ItemPackageDimensions_Length : 3.8 centimeters ItemPackageDimensions_Width : 7.1 centimeters ItemPackageQuantity : 100 ItemTypeKeyword : machine-screws Manufacturer : HZ Ltd ManufacturerGrade : Grade 2 Material : Stainless Steel MeasurementSystem : Imperial MeasurementSystem1 : Imperial MeasurementSystem2 : Metric MetalType : Stainless Steel MetalType1 : Low Carbon Steel MetalType2 : Zinc MetalType3 : Alloy Steel ModelName : 39239 ModelNumber : 39239 NumberOfItems : 100 NumberOfPieces : 100 PackageLevel : unit PartNumber : KM440 ProductDescription : All the screws are full threader. A2 Stainless Steel (304 stainless steel) Standard metric threads pitch. The Phillips flat/countersunk head machine screws are bolts designed to fit inside a countersunk hole. A countersink is both the recessed hole and the tool to make the hole that allows compatible screws and bolts to screw in flush to a surface. Flat/Countersunk head screwss are mostly hidden when screwed in, because their heads are shaped to fit within the special holes. When these holes are empty, they look like a normal screw hole with a conical opening at the top; when they are full, the only visible part should be the very top of the screw or bolt.The typical angle of a countersunk screw head is 90 degrees. Screws Length= Head Height + Thread Length. ProductSiteLaunchDate : 2017-07-05T07:00:00.000Z Size : #4-40 x 1-1/2" SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 31161500