Home Products Wholesale Retail Customers Services Accounts Store Domestic Hardwood - Walnut Home Walnut Availability FAS: 4/4, 5/4, 6/4, 8/4, 10/4, 12/4, 16/4 9 & Wider FAS: 4/4, 5/4, 6/4, 8/4 #1 Common: 4/4 #2 Common: 8/4 Janka Hardness 1010 lbf (pounds force) Specific Gravity .51 (green), .55 ...