ASTM A320 L7M All Threaded Stud Bolts

ASTM A320/A320M L7M All Threaded Stud Bolts

Standard: IFI-136, ASME B16.5, DIN976

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.
Grades
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
Mechanical Properties
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
Recommended Nuts and Washers
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

Testing Lab

Workshop

Warehouse


  • ASTM A320 L7M All Threaded Stud Bolts Related Video:



    https://www.homeownerseries.com

    This is video #2 of a 3-part series. The videos are:

    Part 1 = https://youtu.be/8xlJXrSK3ag?hd=1
    Part 2 = https://youtu.be/BLDvTRZlyCo?hd=1
    Part Overview = https://youtu.be/KCPlbiTcLc4?hd=1

    To watch the Flush Valve Playlist = https://www.youtube.com/view_play_list?p=31C570921B83280C

    Flush Valve

    Parts Needed

    Before this project is started a new flush valve kit will need to be purchased at a hardware or plumbing supply store. This kit should include the flush valve assembly, which is the overflow tube and seat, seals and lock nut, flapper valve with lift chain and a sponge gasket. Additionally, a supplemental sponge gasket may need to be purchased depending on the curvature of the connection between the tank and the base. The last items that need to be purchased are new tank mounting bolts. Generally, a tank will require two or three mounting bolts so purchase enough for your given toilet.

    Tools Needed

    The tools necessary for this project are an adjustable open-end wrench or socket wrench, a large sponge, a flat-head screwdriver, a pair of rib-joint pliers, a cement mixing tub, a small plastic container, and possibly a mini-hacksaw.

    Replacement

    Before beginning this repair shut off the water supply, remove the lid to the tank, and flush the toilet. Once the tank is mostly empty, sponge out the rest of the water draining it into the toilet’s bowl. With the tank empty, position a plastic container to collect water under the water supply hose and unscrew the hose from the base of the tank, having any water drain into the plastic container below. To remove the tank, its mounting bolts will need to first be unscrewed.

    Using the flat head screwdriver to hold the head of the bolt, and an adjustable open-ended wrench to loosen the nut remove all of the tank mounting bolts. If the bolts are corroded and too difficult to unscrew, cut through them with a mini-hacksaw. When the bolts are free lift the tank off of the base and place it into the cement-mixing tub.

    With the tank on its side peel off the sponge gasket reveling the lock nut. While holding onto the flush valve assembly inside the tank, unscrew the lock nut from the base of the tank using a pair of rib-joint pliers.
    With the assembly disconnected from the tank unhook the chain from the flush handle, and remove the old flush valve assembly. Take the new flush valve assembly insuring that its seal is in place, and insert it into the tank of the toilet with the overflow tube at the ten o’clock position. Then place the external seal on the flush valve and hand-tighten the lock nut. Finally tighten the lock nut with rib-joint pliers and affix the sponge gasket over the lock nut. Reattach the flapper valve to the overflow tube and the chain to the flush lever.

    Insert the tank mounting bolts with washers back through the openings in the base of the tank, once they are in place set the tank back on the base of the toilet lining up the mounting bolts with their corresponding openings in the toilet’s bowl. Hand tighten the lock nuts on the mounting bolts and finish off using the screwdriver and socket wrench to secure the bolts water tight with no movement between the tank and the base.

    Now that the tank is re-installed the mounting bolts depending on personal preference, may be trimmed within a quarter inch from the lock nut, using a mini hacksaw. Reattach the water supply hose and turn on the water supply valve. The tank should begin to fill. As the tank fills inspect the joint between the base and the tank for any leaking. Once the tank is full make any adjustment to the overflow tube, flush valve and tank fill valve for optimum water level. With all adjustments complete test cycle the toilet and replace the toilet’s tank lid.



    Watch and see how ANSYS interacts with the Creo CAD system to retrieve and update design parameters along with geometric entities.