ASTM A307 Grade B Heavy Hex Bolts Heavy Hex Cap Screws
Standard: ASME B18.2.1
(Various types of configuration are also available)
Thread Size: 1/4”-4” with various lengths
Grade: ASTM A307 Grade B
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.
ASTM A307
The ASTM A307 specification covers carbon steel bolts and studs ranging from 1/4″ through 4″ diameter. This is your everyday, run of the mill bolt specification often manufactured using A36 round bar. There are three grades A, B, and C* which denote tensile strength, configuration, and application. Refer to the Mechanical Properties Chart for the subtle strength differences within each grade.
| A | Headed bolts, threaded rods and bent bolts intended for general applications. |
|---|---|
| B | Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. |
| C* | Nonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement. *As of August 2007, grade C has been replaced by specification F1554 grade 36. We will continue to supply grade C, if required by the project. |
| Grade | Tensile, ksi | Yield, min, ksi | Elong %, min |
|---|---|---|---|
| A | 60 min | -- | 18 |
| B | 60 - 100 | -- | 18 |
| C* | 58 - 80 | 36 | 23 |
| Element | Grade A | Grade B |
|---|---|---|
| Carbon, max | 0.29% | 0.29% |
| Manganese, max | 1.20% | 1.20% |
| Phosphorus, max | 0.04% | 0.04% |
| Sulfur, max | 0.15% | 0.05% |
| Nuts | Washers | ||
|---|---|---|---|
| A307 Grades A & C* | A307 Grade B | ||
| 1/4 - 1-1/2 | 1-5/8 - 4 | 1/4 - 4 | |
| A563A Hex | A563A Heavy Hex | A563A Heavy Hex | F844 |
Wheel bearing replacement: 2 to 4 hours. ($100 / $300 / $430
Over the past 5,000 miles or so I have heard my front right wheel bearing making a little noise. It hasn’t gotten much worse but it’s best to replace them before they come apart or tear something else up. I have a 1995 Volvo 850.
Proper torque values are:
- Wheel bearing bolts, 33 ft/lbs, then another 60 degrees.
- Brake caliper mounting bolts, 74 ft/lbs.
- Control arm bolts, ball join nut 13 ft/lbs. (plus 120 degrees), subframe bolts 48 ft/lbs. (plus 120 degrees),
- Wheel lug nuts, 80 ft/lbs.
- CV Axle bolt, 89 ft/lbs, then another 60 degrees (36mm or 32mm).
I used a OEM Volvo bearing (so I was told) which I purchased from eBay. I have read that a company named FAG makes bearings for Volvo. They also make the bearings for Timken. Anywho, I would like to think I have a bearing that will last another 227,800+ miles, that’s why I went with Volvo. Unfortunately I have read that someone had an OEM bearing go out on them in less than 15,000 miles. We’ll see (I plan on driving this car for some time).