5/8" x 3" x 24"-Long 4130 Steel Flat Bar-->.625" x 3" 4130 Flat MIL-S-6758,Bar-->.625" x 3" 4130 Flat MIL-S-6758 5/8" x 3" x 24"-Long 4130 Steel Flat, Family Owned and Operated for over 18 Years,5/8" x 3" x 24"-Long 4130 Steel Flat Bar, Discount special sell store free shipping Free shipping Delivery Affordable prices with Fast Delivery. Flat Bar-->.625" x 3" 4130 Flat MIL-S-6758 5/8" x 3" x 24"-Long 4130 Steel.