This website is owned and operated by Portland Bolt and Manufacturing Company. The intent of this site is to provide engineers, contractors, fabricators, and original equipment manufacturers with in-depth, technical information pertaining to the ASTM A193 specification. Please contact us if you have questions, require additional information, need a price quote, or would like to place an order. For more information regarding Portland Bolt's manufacturing capabilities and full product line, visit
www.portlandbolt.com .
ASTM: If you are working with A193 heavy hex bolts and studs on a regular basis, we strongly recommend purchasing a copy of the ASTM A193 specification and ASTM A962 specification from ASTM International.
ASME: ASME B18.2.1 which covers heavy hex bolt dimensions, and ASME B1.1 which provides dimensional criteria for both UNC and 8UN threads can be purchased from Techstreet.
