Package Quantity : 20Pcs Flat Head Furniture Bolts Thread Diameter : 1/4" ; About 0.245 Inch Thread Length : 3/4" ; Length Measured From Under The Head Material : 304 Stainless Steel 18-8 Flat Head Furniture Bolts : Very Strong ; Best For The Assembly Of Beds ; Cots And Flat Pack Furniture, And Other Machinery Industry ; Will Support All Of Your Projects Flat Head Furniture Bolts : Very Strong, Best for the assembly of beds, cots and flat pack furniture, also good for office appliance, ship assembly and other machinery industry. Is Great For Both Indoor And Outdoor Use ; Will Support All Of Your Projects