ASTM A320/A320M L7 Tap End Studs Double End Studs
Standard: IFI-136, ASME B16.5
Inch Size: 1/4”-2.1/2” with various lengths
Metric Size: M6-M64 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 A320
Scope Originally approved in 1948, the ASTM A320 specification covers alloy steel and stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1” in diameter. Below is a basic summary of a few of the common grades within the ASTM A320 specification. A number of other less common grades of ASTM A320 exist, but not covered in the description below.| L7 Alloy steel | AISI 4140/4142 Quenched and tempered |
| L43 Alloy steel | AISI 4340 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 |
| Grade | Size | Tensile, ksi, min | Yield, ksi, min |
Charpy Impact 20-ft-lbf @ temp |
Elong, %, min | RA, %, min |
| L7 | Up to 21/2 | 125 | 105 | -150° F | 16 | 50 |
| L43 | Up to 4 | 125 | 105 | -150° F | 16 | 50 |
|
B8 Class 1 |
All | 75 | 30 | N/A | 30 | 50 |
|
B8M Class 1 |
All | 75 | 30 | N/A | 30 | 50 |
|
B8 Class 2 |
Up to 3/4 | 125 | 100 | N/A | 12 | 35 |
| 7/8 - 1 | 115 | 80 | N/A | 15 | 35 | |
| 11/8 - 11/4 | 105 | 65 | N/A | 20 | 35 | |
| 13/8 - 11/2 | 100 | 50 | N/A | 28 | 45 | |
|
B8M Class 2 |
Up to 3/4 | 110 | 95 | N/A | 15 | 45 |
| 7/8 - 1 | 100 | 80 | N/A | 20 | 45 | |
| 11/8 - 11/4 | 95 | 65 | N/A | 25 | 45 | |
| 13/8 - 11/2 | 90 | 50 | N/A | 30 | 45 |
| Grade | Nuts | Washers |
| L7 | A194 Grade 4 or 7 | F436 |
| L43 | A194 Grade 4 or 7 | F436 |
| B8 Class 1 | A194 Grade 8 | SS304 |
| B8M Class 1 | A194 Grade 8M | SS316 |
| B8 Class 2 | A194 Grade 8, strain hardened | SS304 |
| B8M Class 2 | A194 Grade 8M, strain hardened | SS316 |
https://www.etrailer.com/Trailer-Cargo-Control/Dutton-Lainson/DL22145.html
Today we’re going to install and take a look at the Dutton Lainson extra offset trailer spare tire carrier, part number DL22145. Here’s what our carrier will look like with our spare tire mounted. As you can see, from the angle of the carrier and then the angle of the face of the carrier that our wheel mounts to, it angles the tire out away from the frame so that we get plenty of clearance between the spare tire and the boat. Now our carrier is designed to fit 13 and 15-inch wheel or rim tires. It will fit 5 on 4 and 1/2-inch bolt pattern and 6 on 5 and 1/2-inch bolt pattern through the 3 studs to bolt to the carrier. Currently we’re on a 5 and a 4 and 1/2-inch bolt pattern and we can use the other 3 studs by simply taking the studs out and driving them into the other 3 pre-drilled holes for the 6 and a 5 and 1/2-inch bolt pattern. When bolting to our frame, the carrier is designed to fit a maximum width of 3-inches and maximum height of 5-inches. The carrier and hardware is zinc-plated with a tough plate finish that has 3 times the corrosive resistance of a standard zinc-plated chrome process and 30% greater resistance when compared to powder-coated finishes. Now to mount our spare tire carrier we’ll have the main body and bracket that will get clamp to our frame.
Note: Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.