What is SAE J429 Grade 8?

SAE J429 Grade 8 hex head cap screws are common, high-strength fasteners manufactured from heat-treated medium carbon alloy steel, quenched and tempered. Grade 8 cap screws are available in diameters from 1/4″ through 1 1/2″ inclusive. Dimensional specifications are governed by ASME B18.

What does SAE J429 mean?

Society of Automotive Engineers specification for fasteners
SAE J429 is a Society of Automotive Engineers specification for fasteners. SAE J429 covers fasteners sizes up to 1-1/2″ inclusive. Used in automotive and related industries, these fasteners can be found in small quantities in automotive and home improvement stores.

What is the ASTM grade designation for a bolt equivalent to SAE Grade 8?

Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards. The A325 bolt strength, or SAE grade 5 bolt strength, is usually used for structural bolting projects.

What is the difference between SAE and ASTM?

ASTM (American Society for Testing and Materials) covers primarily bolts and fasteners for construction applications. SAE (Society of Automotive Engineers) covers fasteners for automotive, machinery, and OEM applications.

What is the metric equivalent to Grade 8?

Metric Bolt Conversion

What is the difference between Grade 2 and Grade 5 bolts?

A grade 2 bolt made of low-carbon steel has a tensile strength of 64,000 pounds per square inch or less. A bolt head with three raised dashes in a radial pattern marks an SAE grade 5 bolt of tempered medium carbon steel with a tensile strength of at least 105,000 pounds per square inch.

What is the difference between Grade 5 and Grade 8 bolts?

Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head. Grade G is roughly equivalent to Grade 8.

Is grade C the same as Grade 8?

Grade C. Grade C is a thru-hardened medium carbon zinc plated alloy steel. No head markings (manufacturers mark may also be included). Finish is equivalent in strength to Grade 8 but without the yellow color.

What is SAE grade?

The Society of Automotive Engineers (SAE) developed a scale for both engine (motor oil grades) and transmission oils. This number represents the oil’s resistance to thinning at high temperatures. For example, 10W-30 oil will thin out at higher temperatures faster than 10W-40 will.

What does ASTM A307 mean?

Carbon Steel Bolting
ASTM A307 Grade A Carbon Steel Bolting with minimum tensile of 60 ksi. ASTM A307 Grade A is grade specification in carbon steel bolting for use in general purpose application. This grade covers hex headed bolts, stud bolts, threaded rods or any other bolting having a minimum tensile strength of 60 ksi.

What is stronger Grade 8 or Grade 2?

A grade 8 hex head bolt is made from a carbon alloy and treated to create the optimum durability. Grade 2 hex head bolts are made from low to medium strength carbon steel and offer a tensile strength of 60,000 to 74,000 psi, depending on the diameter.

What kind of steel is used in SAE J429?

SAE J429 is the standard specification for inch-series steel bolts, screws, studs, SEMS screws and U-bolts in sizes up to and including 1-1/2 inches. They are generally manufactured from variants of medium carbon steel.

Which is the closest steel grade to SAE?

Table of Steel Equivalent Grades (EN, SAE/AISI, UNS, DIN, BS, UNI, JIS) The table below compares steel equivalent grades of materials from various international specifications.  Note that materials compared are the nearest available grade and may have slight variations in actual chemistry. Comparison of steel grades by chemistry EN # EN name SAE

Which is the ASTM grade for steel fasteners?

ASTM A194/A194M — Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service.

Are there any steel equivalents to other grades?

The table below compares steel equivalent grades of materials from various international specifications. Note that materials compared are the nearest available grade and may have slight variations in actual chemistry. Remember to note that steel equivalent grades may have slight variations in chemistry between specifications.