SAE J429 Grade 8 Hex Bolts Hex Cap Screws
Standard: ASME B18.2.1 various types of head are available
Thread Size: 1/4”-1.1/2” with various lengths
Grade: SAE J429 Grade 8
Finish: Black Oxide, Zinc Plated, Hot Dip Galvanized, Dacromet, and so on
Packing: Bulk about 25 kgs each carton, 36 cartons each pallet
Advantage: High Quality and Strict Quality Control, Competitive Price,Timely Delivery; Technical Support, Supply Test Reports
Please feel free to contact us for more details.
SAE J429 covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in sizes to 1-1/2” inclusive.
Below is a basic summary of the most common grades. SAE J429 covers a number of other grades and grade variations not covered in this summary, including 4, 5.1, 5.2, 8.1, and 8.2.
| Grade | Nominal Size, inches | Full Size Proofload, psi | Yield Strength, min, psi | Tensile Strength, min, psi | Elong, min, % | RA, min, % | Core Hardness, Rockwell | Tempering Temperature, min |
|---|---|---|---|---|---|---|---|---|
| 1 | 1/4 thru 1-1/2 | 33,000 | 36,000 | 60,000 | 18 | 35 | B7 to B100 | N/A |
| 2 | 1/4 thru 3/4 | 55,000 | 57,000 | 74,000 | 18 | 35 | B80 to B100 | N/A |
| Over 3/4 thru 1-1/2 | 33,000 | 36,000 | 60,000 | 18 | 35 | B70 to B100 | ||
| 5 | 1/4 thru 1 | 85,000 | 92,000 | 120,000 | 14 | 35 | C25 to C34 | 800F |
| Over 1 thru 1-1/2 | 74,000 | 81,000 | 105,000 | 14 | 35 | C19 to C30 | ||
| 8 | 1/4 thru 1-1/2 | 120,000 | 130,000 | 150,000 | 12 | 35 | C33 to C39 | 800F |
| 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. | ||||||||
| Grade | Material | Carbon, % | Phosphorus, % | Sulfur, % | Grade Marking |
|---|---|---|---|---|---|
| 1 | Low or Medium Carbon Steel | 0.55 max | 0.030 max | 0.050 max | None |
| 2 | Low or Medium Carbon Steel | 0.15 - 0.55 | 0.030 max | 0.050 max | None |
| 5 | Medium Carbon Steel | 0.28 - 0.55 | 0.030 max | 0.050 max | |
| 8 | Medium Carbon Alloy Steel | 0.28 - 0.55 | 0.030 max | 0.050 max |
| Nuts | Washers |
|---|---|
| J995 | N/A |
For fasteners larger than 1-1/2″ in diameter, the following ASTM grades should be considered.
| SAE J429 Grade | ASTM Equivalent |
|---|---|
| Grade 1 | A307 Grades A or B |
| Grade 2 | A307 Grades A or B |
| Grade 5 | A449 |
| Grade 8 | A354 Grade BD |
| This chart compares SAE and ASTM specifications that are similar but not identical in diameters through 1½". | |
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This is what my Monster tower does when i tow the boat on the road or driving the boat on water. it feels like the tower is going to rip out of my boat any day now. ive tried replacing the bolts because the nylons do wear out and coated them with antiseize…putting locktite on the bolts would probably make them snap. i am hoping the people at monster tower can help me out. i have my fingers crossed