Download a complimentary PDF of our Fastener Markings chart. Contact American Fastener with any questions or for a custom quote. Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in.) Mechanical Properties Proof Load(psi) Yield Strength Min (psi) Tensile Strength Min (psi) NoGradeMark SAE J429 Grade 1 Bolts, Screws, Studs Low or Medium Carbon  Bolt Depot - Bolt InformationBolt Head/Wrench Size. Recommended Bolt Torque. Standard Thread Length for Bolts. Threads Per Inch Table (Coarse and Fine) US Bolt Diameter and Thread Chart. Our printable 'lay-over' sizing chart for identifying US bolt diameter and thread count.
Bolts are regularly marked to indicate their strength, which is dependent on the material and dimensions of the bolt. Material. Metric class and marking. Imperial grade and marking. Metric/imperial proof load. Low or medium carbon steel. (no class) Grade 2. Medium carbon steel, quenched & tempered. Fastener basics - SlideShareFeb 03, 2015 · Grade 2 Grade 5 Grade 8 Class 8.8 Class 10.9 Class 12.9 US bolt head markings Metric bolt head markings 8.8 10.9 12.9 Hex bolts, or hex cap screws,are used in machin- ery and construction.Can be used with a nut,or in a tapped hole.Fully threaded hex bolts are also known as tap bolts. Fastenerdata - Fastener Grades Class kna - Fastener Bolts are typically marked on the head to show the grade of the bolt and the manufacturers identification. Grade 2 Grade 5 Grade 8 . USA Grade 2 bolts are commercial low tensile bolts and do not require grade marking; they normally have the manufacturers mark on the head the material is similar in strength to European metric class 4.6
Min. Tensile Strength (psi):105,000. SAE Grade 8 Bolts. Head Marking:6 radial lines; Material:Medium carbon alloy steel, quenched and tempered; Size Range:1/4-inch to 1-1/2-inch; Proof Load (psi):120,000; Min. Yield Strength (psi):130,000; Min. Tensile Strength (psi):150,000; Grade A325 Metric Bolt Grade Markings and Steel Strength Chart Nov 05, 2019 · Head Markings:Metric Bolt Class:Mechanical Properties:Proof Load (MPa) Min Yield (MPa) Min Metric Steel Bolts - Grades and Property ClassesSteel Bolts - SAE Grades. For metric bolts strength is according ISO 898 Mechanical properties of fasteners made of carbon steel and alloy steel described by "property classes" with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. Property Class. Head Marking.
Grade B8 Bolts, Screws, Studs for High Temperature Service AISI 304 14 and Larger 14 thru 34 Over 34 thru 1 Over 1 thru 1 ¼ Over 1 ¼ thru 1 ½ 30,000 100,000 80,000 65,000 50,000 75,000 125,000 115,000 105,000 100,000 ASTM A193 Grade B8C Bolts, Screws, Studs for Bolt Depot - Fastener Materials and Grade InformationFastener Materials and Grades. About Fastener Materials. and Coatings. Bolt Grade Markings. and Strength Chart. About Galvanic Corrosion. About Thread Galling.