Wholesale ODM Stainless Steel DIN 975 M16 Double End Threaded Stud Bolt
To fulfill the customers' over-expected fulfillment , we have now our solid staff to deliver our greatest general assistance which includes internet marketing, product sales, creating, manufacturing, excellent controlling, packing, warehousing and logistics for Wholesale ODM Stainless Steel DIN 975 M16 Double End Threaded Stud Bolt, We've been honest and open up. We glance ahead on your pay a visit to and developing trustworthy and long-term standing relationship. To fulfill the customers' over-expected fulfillment , we have now our solid staff to deliver our greatest general assistance which includes internet marketing, product sales, creating, manufacturing, excellent controlling, packing, warehousing and logistics for China Bolt and Rods, We strive for excellence, constant improvement and innovation, is committed to make us the "customer trust" and the "first choice of engineering machinery accessories brand" suppliers. Choose us, sharing a win-win situation!

Cadmium Plated A193 B7 Threaded Stud Bolts

API 6A Flange Valve Wellhead All Thread Stud Bolts

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 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 Nuts Washers
B7 A194 Grade 2H 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

Testing Lab

Workshop

Warehouse

To fulfill the customers' over-expected fulfillment , we have now our solid staff to deliver our greatest general assistance which includes internet marketing, product sales, creating, manufacturing, excellent controlling, packing, warehousing and logistics for Wholesale ODM Stainless Steel DIN 975 M16 Double End Threaded Stud Bolt, We've been honest and open up. We glance ahead on your pay a visit to and developing trustworthy and long-term standing relationship. Wholesale ODM China Bolt and Rods, We strive for excellence, constant improvement and innovation, is committed to make us the "customer trust" and the "first choice of engineering machinery accessories brand" suppliers. Choose us, sharing a win-win situation!
    • Wholesale ODM Stainless Steel DIN 975 M16 Double End Threaded Stud Bolt Related Video:



    website:https://www.jhmindustry.com/
    Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.



    Robust crystal radio. DIY step by step on how to make it. No special tools or skills needed. Most parts can be had from recycled things. The purchased parts run about $3. Good during power failures, when batteries are not available, for prepping and similar.

    Depending on your design (coil mostly) it can receive in the AM broadcast band, approximately 535 to 1700 kHz.

    See Warnings below.

    This one is loosely based on the Cub Scout / Wolf Scout / Boy Scout crystal radio design.

    OPERATION TIPS & TRICKS
    - A good antenna is important. Longer is usually better (see antenna warning below), a good ground is next most important. More below
    - With some stations, you can put a finger or 2 or 3 inside the tuner coil to improve reception. Move them around for best reception.
    - A finger near the coil can also improve reception. Touching the coil directly usually lowers sound volume, BUT a piece of paper or thin plastic between finger and coil often improves sound / tuning. Move finger around.
    - Touching different parts of the radio or getting near them can affect performance.

    TOOLS
    - Screw driver
    - Knife
    - Sandpaper (small piece, fine)
    - (Optional) Saw, if you do not have the wood & tube already cut
    - (Optional) Hand drill for screw holes
    - (Optional) Soldering iron, solder

    MATERIALS
    - 1 x Germanium Crystal Diode (1N34A)(bought: Amazon, Radio Shack 276-1123, Digikey, Jameco, Mouser…)
    - 1 x Resistor (10k ohm)(bought: ditto)(see note below)
    - 1 x Crystal earphone (can NOT be other type)(bought: Amazon, Jaycar, Jameco?) MUST be like the type in the video. Regular iPod or similar will NOT work.
    - 1 x Base 21 x 17.5 cms x 2 cms thick or more (wood scrap)
    - 1 x PVC pipe 15 cms long or stiff cardboard tube x 2.5 inch diameter
    - 1 x motorcycle / bicycle spoke, 2mm diameter or brass rod or stainless rod
    - Enameled bell wire (can be from old transformer, solenoid, …) 0.3 to 1.5mm (note: I used 0.5mm or roughly 19-20 AWG, the number of turns and length of pipe change with wire size.) Bigger wire has lower resistance (better sound), BUT you get fewer turns per centimeter (less tuning).
    - Screws, stainless or brass (6 for wire hold downs, 2+ for coil mounting),
    - Fahnestock clips (6) (bought: Amazon & electrical shops). OR brass washers (13) (bought, hardware store)
    - 2 bigger washers for wiper.
    - 1 bigger, large head screw for wiper.

    ANTENNA & GROUND
    - The antenna is just a long piece of wire (I use scrap wire from old transformers, fluorescent light ballasts and such). The longer the better.
    - Try different lengths and orientations (vertical, horizontal)
    - A good ground helps. A wire to a ground rod is good. Metal water pipes also work well.

    NOTES:
    - I ran the calculations on the coil and with 2.25 inch tube and 170 turns it’s about 425 micro Henries (but it varies up to 650 depending on whose calculator I use). That’s a bit more than the typical design which runs about 350 – 400, but still very workable. It means you can get by with more like 150 turns of wire.
    - The resistor is necessary to get the best sound from these “new” crystal earphones. The new ones are piezoelectric and have lots of capacitance. Without the resistor the charge builds up then discharges so you get constant “static” sounds. The resistor bleeds off charge so you get louder, and much clearer sound.
    - Also called a foxhole radio.

    WARNINGS:
    - Never connect radio to any source of power. Not house current, nor batteries, nothing!
    - Never use the radio during lightning storms.
    - Never run an antenna over or near power lines.
    - Disconnect antenna when not in use.
    - Never ground to electrical items, plugs or similar.
    - If you don’t know, don’t do it.

    OTHER:
    An excellent website by an avid and skilled builder:

    https://www.lessmiths.com/~kjsmith/crystal/cr0intro.shtml

    INTERESTING LINKS
    Air Core: https://www.circuits.dk/single-layer-air-core-inductor-calculator/
    Resonant Frequency: https://www.deephaven.co.uk/lc.html

    OTHER CRYSTAL RADIO VIDEOS
    - A comparing 2 designs, one better than the other