Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths.

Specifications: ASTM A563: Carbon and Alloy Steel Nuts ASTM A194/A194M: Carbon and Alloy Steel Nuts for Bolts for High‐Pressure and High‐Temperature Service. Other, less common, grades exist but are not listed here.

There is a link on this page that will take you to (a document on) the US Patent & Trademark Office where you can download the file and look at all the various markings and where the bolts are made. It seems the most common marking we se these days is JH.

These charts helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts.

Fastener manufacturers mark the heads of their bolts and screw with the identification mark. This is normally a trade mark but can be an abbreviation of their company name or a symbol. Traceability is important particularly in the case of fastener failure.

Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation. Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.

Apr 10, 2021 · Screw and bolt head markings identify the manufacturer of the fastener and the standard to which the fastener was made. Below, we’ll explore both of those concepts, then connect them together with a few examples.

JDF HEX BOLT 1/2" 13 X 1 1/2" GRADE 5 ZINC PLATED (LOT OF 10) : IRONTIME SALES INC. IMPORTANT! PLEASE READ BEFORE BIDDING, MAKING AN OFFER, OR PURCHASING. YOU WILL RECEIVE WHAT IS PICTURED, NOTHING LESS NOTHING MORE. PLEASE DO NOT PAY UNTIL INVOICED. WE COULD POSSIBLY SAVE …

Bolt Grade Markings and Strength Chart Mechanical Properties Head Marking No Markings 3 Radial Lines 6 Radial Lines Stainless markings vary. Most stainless s non- magnetic Head Marking 10.9 Grade and Material Grade 2 low or medium carbon Grade 5 Medium Cathon Steel, Quenched and Tempered Grade 8 Medium Carbon Alloy Steel, Quenched and Tempered

BOLTS MARKINGS BNA 12.9 CLASS 12.9 1200 Mpa High Tensile Strength Carbon Steel Refer to the vs Metric Strength Chart» for strength comparisons THE LARGEST SELLER OF FASTENERS ONLINE FRO Fasteners *ASTFNER Galore WAREHOUSE Unit 9 & 10, 93 Rivergate Place, MURARRIE QLD 4172 Ph : 07 3192 9800 | E : [email protected]