What is SAE J429 Grade 5?
J429 Mechanical Properties
| Grade | Nominal Size, inches | Yield Strength, min, psi |
|---|---|---|
| 5 | 1/4 thru 1 | 92,000 |
| Over 1 thru 1-1/2 | 81,000 | |
| 8 | 1/4 thru 1-1/2 | 130,000 |
| Grade 2 requirements for sizes 1/4″ thru 3/4″ apply only to bolts 6″ and shorter, and to studs of all lengths. For bolts longer than 6″, Grade 1 requirements shall apply. |
What are Grade 5 bolts rated for?
Grades of Bolts – Bolt Grade Markings & Bolt Strength Chart
| Bolt Grade Markings & Strength Chart – Inch Steel Bolts | ||
|---|---|---|
| Bolt Grade / Specification | Material | Proof Load psi |
| Grade 5 – SAE J429 Bolts, Screws and Studs | Medium carbon steel or carbon steel with additives, quenched and tempered | 85,000 74,000 |
What is J429?
SAE J429 Grade 8 hex head cap screws are common, high-strength fasteners manufactured from heat-treated medium carbon alloy steel, quenched and tempered. Inch series fasteners meeting SAE J429 Grade 8 specifications are general use fasteners commonly used in automotive and construction related industries.
What identification markings does a SAE Grade 5 Bolt have?
Three radial lines spaced at 120 degrees indicate an SAE grade 5 fastener made of medium-strength carbon steel. Six radial lines spaced at 60 degrees indicate an SAE grade 8 fastener made of hardened, medium carbon-alloy steel.
What material is a Grade 5 bolt made of?
alloy steel
Grade 5. Grade 5 alloy steel is a medium carbon zinc plated alloy steel that is heat treated to increase hardness. Grade 5 bolts have three (3) evenly spaced hash marks on the head markings (manufacturers mark may also be included).
How hard is a Grade 5 bolt?
Grade 5 Bolts and fasteners are made of medium strength carbon steel and are specified under the Society of Automotive Engineers (SAE). with a minimum tensile strength of 120,000 psi in diameters through 1 in. and 105,000 psi for diameters over 1 in.
How can you tell if a bolt is a Grade 5?
Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.
Is Grade 5 a strong bolt?
Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications.
How is a Grade 5 bolt identified?
Grade 5 Bolts and fasteners are made of medium strength carbon steel and are specified under the Society of Automotive Engineers (SAE). Grade 5 bolts can often be identified by the 3 marks on the head. Each Grade 5 bolt from U-Bolt-It are available zinc plated.
