9 rows Determining Bolt Grades Understanding Head Markings The Nut and Bolt Solution Series. Identifying bolt grades and head markings for US grades 2, 5 and 8. Metric grades 8.8.,10.9 and 12.9 (socket products). Video 1: Determining Bolt Grade and Head Markings FASTENER IDENTIFICATION GUIDE October 3, 2008 . Revision Information Log Guide for Approved Fasteners October 3, 2008 . REQUIRED MARKINGS ASTM A 193 Grade B8 Class 1 Regular Series and Heavy Series. 67608 Stud, Stain.Steel 67623 . indicating bolt is atmospheric corrosion resistant and of a weathering type (at option of manufacturer). - Length of a carriage bolt is measured from the underhead bearing surface to the extreme end of the bolt. - ASME B18.5-1990 does not specify dimensions for the #8 or #12 diameters.

Carriage Bolts, Grade A, Zinc Plated The information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. If . Basic Bolt Diameter Square Depth P Corner Radius on Square A H O Specification Requirements: The carriage bolt features a smooth rounded head The carriage bolt features a smooth rounded head for appearance safety and security. The square shank under the head pulls into the material as nuts are tightened; this prevents the bolt from turning. A carriage bolt has a square shoulder under a rounded head . This allows the carriage bolt to resists turning when the nut is tightened or removed. Our steel carriage bolts are available in steel with various platings, and stainless steel carriage bolts. Carriage--Ribbed Neck, 18-8. Carriage--Square Neck, 18-8. Grade 8, Fully Threaded.

Portland Bolt manufactures carriage bolts from 1/2″ diameter through 1-1/4″ diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions, carriage bolts larger than 1″ in diameter, or bolt … At Fastener SuperStore, Inc., we specialize in multiple bolt types so that you will have what you need, regardless of the type or scope of your project. Here are heremon uses for the bolts we carry: Carriage bolts are self-locking when paired with a square hole in a metal strap. This is a useful feature for installation from one side. bolt identification and grade markings: SAE J429 Grade 2 ASTM A307 Grade A. Interchangeability of Grade 2 and A307A Fasteners In general, since the minimum strength requirement of a Grade 2 is greater than that of an A307A, a Grade

Stock up on the right carriage bolt from Grainger to build strong wooden decks and other structures the right way every time. You might also want to grab a bolt assortment for backup, as well as the ideal style of U bolt to run piping for outdoor lighting and sound systems.