Grade and Material (Bolts)
| ID Grade Mark | Specification | Part Description | Material | Nom Size Range | Yield (min psi) | Tensile (min psi) | Proof Load (psi) |
|---|
| No Grade Mark | ASTM A307 Grades A & B | Bolts, Screws, Studs | Low Carbon Steel | ¼ thru 4 | | 60,000 | |
| No Grade Mark | SAE J429 Grade 2 | Bolts, Screws, Studs | Low or MediumCarbon Steel | ¼ thru ¾Over 1 to 1 1/2 | 57,00036,000 | 74,00060,000 | |
 | SAE J429 Grade 5 | Bolts, Screws, Studs | Medium Carbon Steel Quenched and Tempered | ¼ thru 1Over 1 to 1 1/2 | 92,00081,000 | 120,000105,000 | |
| | ASTM A449 | Bolts, Screws, Studs | Medium Carbon Steel Quenched and Tempered | ¼ thru 1Over 1 to 1 1/2Over 1 ½ thru 3 | 92,00081,00058,000 | 120,000105,00090,000 | |
| A325 | ASTM A325 Type 1 | High Strength Structural Bolts | Medium Carbon Steel Quenched and Tempered | ½ thru 11 1/8 thru 1 1/2 | 92,00081,000 | 120,000105,000 | |
 | SAE J429 Grade 8 | Bolts, Screws, Studs | Medium Carbon Alloy SteelQuenched and Tempered | ¼ thru 1 1/2 | 130,000 | 150,000 | |
| A490 | ASTM A490 | High Strength Structural Bolts | Alloy SteelQuenched and Tempered | ½ thru 1 1/2 | 130,000 | 150,000 Min170,000 Max | |
| B6 | ASTM A193 | Bolts, Screws, Studs for High Temperature Service | AISI 410 | ¼ thru 4 | 85,000 | 110,000 | |
| B7 | ASTM A193 | Bolts, Screws, Studs for High Temperature Service | AISI 4140, 4142, or 4145 | ¼ thru 2 ½Over 2 ½ thru 4Over 4 thru 7 | 105,00095,00075,000 | 125,000115,000100.000 | |
| B8 | ASTM A193ASTM A320 | Bolts, Screws, Studs for High or Low Temperature Service | AISI 304, Carbide Solution Treated | ¼ and Larger | 30,000 | 75,000 | |
| L7 | ASTM A320 | Bolts, Screws, Studs for Low Temperature Service | AISI 4140, 4142, or 4145 Quenched and Tempered | ¼ thru 2 1/2 | 105,000 | 125,000 | |