Atlanta Rod & Mfg. Co. Inc. has a climate controlled testing laboratory onsite to certify your bolts and nuts in house and on time. Our fasteners come with original mill test reports and actual mechanical test certificates. Our Tinius Olsen tensile tester has the capacity to full size test our fasteners up to 300,000 lbs. We also offer charpy impact testing, hardness, proof loads, and machine sample tensile testing. We have a huge supply of gauges for certifying thread conformance on the fasteners that we produce.