Specification Brand : uxcell BulletPoint1 : Material: 304 Stainless Steel; Package Content: 30pcs x Carriage Bolt; Product Name: Carriage Bolt BulletPoint2 : Thread Size: M6 x 45mm / 0.24" x 1.8"(D*L); Weight: 361g; Head Style: Round Head BulletPoint3 : Main Color: Silver Tone; Thread Pitch: 1mm; Thread Style: Fully Thread BulletPoint4 : Total Size: 15.5 x 53mm / 0.61" x 2.1"(Max.D*L); Under Head Length: 50mm / 2" BulletPoint5 : Square Neck Size: 6 x 6 x 5mm / 0.24" x 0.24" x 0.2"(L*W*H); Modle: DIN603 BulletPoint6 : 3. Screw fixation, strong stability, the optical axis and aluminum support screw fixation is stable and tight BulletPoint7 : 4. Smooth and non-stuck, long service life Color : Silver ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier : 8415555456769 ItemName : uxcell M6x50mm 304 Stainless Steel Fully Thread Square Neck Carriage Bolts DIN603 30pcs ItemPackageDimensions_Height : 21.59 centimeters ItemPackageDimensions_Length : 4.32 centimeters ItemPackageDimensions_Width : 14.73 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : hardware-nut-and-bolt-sets Manufacturer : uxcell ManufacturerGrade : Grade 304 Material : Stainless Steel MeasurementSystem : Metric MetalType : Stainless Steel ModelNumber : US-SA-AJD-226085 NumberOfItems : 1 NumberOfPieces : 30 PartNumber : a16102000ux0402 ProductDescription : Carriage Bolts have a smooth, rounded head that has a small square section underneath. They are used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning.