ASTM A193/A193M B7 All Threaded Stud Bolts
API 6A 6D Flange Valve Wellhead ASME/ANSI Flange All Thread Stud Bolts
Alloy steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
Standard: IFI-136, ASME B16.5, DIN976
Inch Size: 1/4”-4” with various lengths
Metric Size: M6-M100 with various lengths
Other Available Grade:
ASTM A193/A193M B7, B7M, B16, B8 Class 1 & 2, B8M Class 1 & 2,
ASTM A320/A320M L7, L7M, L43, B8 Class 1 & 2, B8M Class 1 & 2, and so on.
Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.
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 A193 Scope
Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications. The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature or high pressure service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
Below is a basic summary of a few of the common grades. ASTM A193 covers a number of other standard specifications not covered in this description including B5, B6, and B16.
Grades
|
B7 |
Alloy steel, AISI 4140/4142 quenched and tempered |
|
B8 |
Class 1 Stainless steel, AISI 304, carbide solution treated. |
|
B8M |
Class 1 Stainless steel, AISI 316, carbide solution treated. |
|
B8 |
Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
|
B8M |
Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
Mechanical Properties
|
Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
|
B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
|
2-5/8 - 4 |
115 |
95 |
16 |
50 |
|
|
4-1/8 - 7 |
100 |
75 |
18 |
50 |
|
|
B8 Class 1 |
All |
75 |
30 |
30 |
50 |
|
B8M Class 1 |
All |
75 |
30 |
30 |
50 |
|
B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
35 |
|
7/8 - 1 |
115 |
80 |
15 |
35 |
|
|
1-1/8 - 1-1/4 |
105 |
65 |
20 |
35 |
|
|
1-3/8 - 1-1/2 |
100 |
50 |
28 |
45 |
|
|
B8M Class 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
|
7/8 - 1 |
100 |
80 |
20 |
45 |
|
|
1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
|
|
1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
Recommended Nuts and Washers
|
Bolt Grade |
Washers |
|
|
B7 |
F436 |
|
|
B8 Class 1 |
A194 Grade 8 |
SS304 |
|
B8M Class 1 |
A194 Grade 8M |
SS316 |
|
B8 Class 2 |
A194 Grade 8 |
SS304 |
|
B8M Class 2 |
A194 Grade 8M |
SS316 |
Strain hardened nuts available as a supplementary requirement
https://www.HotDrillScrews.com/bonded_neoprene_washers.htm have a very large inventory of bonded neoprene sealing washers and epdm washers.
Hi, I am Aaron from Badger Utility. Today I am going to show you how to do three things, check for suspension bushing wear, check the wear washers on the suspension bushings, and check the shock bushing wear as well. Let’s get started.
We will start with the suspension bushings. To check to see if those are worn or not, we will measure from the bottom of the arm to the bottom of the hanger. I have taken my ruler and put a line on the ¾” mark to make it easier to see. I will put the ruler on the bottom of the suspension arm and I am measuring from the bottom of the arm to the bottom of the hanger. Anything less than ¾” the bushing are ok. Anything more than ¾” the bushings are worn and need to be replaced. These are under ¾”, they can stay in service.
Another thing we are going to check for is the wear washers. Now the wear washers are the plastic circles on the outside of the suspension arm. Those protect the hanger from wear while the suspension arm is moving. Now if you see the washers are cupped, torn or missing, they need to be replaced. Now just because the wear washers may be worn, doesn’t necessarily mean the suspension bushings are worn. Otherwise, these look pretty good. They can stay in service.
Finally we will check the shock bushings. The shock bushings are located right where the shock bolts into. They are just a rubber bushing. If you can twist the shock and notice a quite a bit of play, they need to be replaced. This strap right here helps protect the shock from over extending if you ever lift the trailer up or go into some hilly areas. Another thing you will want to check for is if you have any broken or bent bolts or cracked mounts. The shock also may have a little bit of dirt or oil film on the bottom of the shock right here. Just because there is a little bit of dirt or oil film doesn’t mean it is leaking. If the shock has clear oil runs running down the tube it needs to be replaced. These shocks look pretty good. They can stay in service.
I have shown you three different suspension parts to check. Making sure these parts aren’t worn and are in good operating condition, will keep your trailer riding smooth down the road.