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Cold Galvanizing Duplex Stainless Steel Fasteners 8TPI 16UN UNC UNF ISO9001

Zhengzhou Huitong Pipeline Equipment Co.,Ltd.

Cold Galvanizing Duplex Stainless Steel Fasteners 8TPI 16UN UNC UNF ISO9001

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Brand Name : HT

Model Number : 8TPI 16UN UNC UNF stainless steel bolt nut washer fasteners

Certification : ISO9001

Place of Origin : China

MOQ : 1 set

Price : Negotiation

Payment Terms : L/C,T/T, Western Union

Supply Ability : 1000 set per month

Delivery Time : 30-35 work days

Packaging Details : wooden case, wooden pallet

Product Type : Bolt, Nut, Washer, Stud bolt, U bolt

Name : 8TPI 16UN UNC UNF stainless steel bolt nut washer fasteners

Size : M6-M100

Finish : Cold galvanizing, Zinc-Nickel, Black, Cadium plated

Producing standard : DIN, ASME

Material : Nickel alloy/stainless steel/duplex stainless

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8TPI 16UN UNC UNF stainless steel bolt nut washer fasteners

1. Stainless Steel Grades:

Stainless steel grades are lumped into classes -- the main ones being austenitic, ferritic, and martensitic. The metalworking powers-that-be developed these classes to consolidate chemical and mechanical properties into categories based on the needs of customers’ uses.

①Austenitic Steels

Austenitic steels mainly reside in the 200 and 300 series. Austenitics are the most specified stainless steel grades thanks to their excellent formability and corrosion resistance.

Austenitic stainless steels contain 15%-30% chromium and 2%-20% nickel for better surface quality, corrosion and wear resistance, and workability. They are nonmagnetic when annealed but -- depending on the nickel content and other composition factors --- can become slightly magnetic when cold worked.

You may notice “L” or “H” attached to some of the grades. “L” denotes low carbon content, which equals increased corrosion resistance. “H” denotes high carbon content, a sign of increased strength.

②Ferritic Steels

This group of 400-series steels contains 10.5%-20% chromium for corrosion protection and resistance to scaling at high temperatures. Heat treating won’t harden them, and they are always magnetic. Carbon content is low. Ferritic stainless is used in cases where resistance to corrosion is key.

③Martensitic Steels

These steels, also of the 400 series, usually contain 11.5%-18% chromium and have higher levels of carbon than their ferritic counterparts. Heat treatment of these steels can result in a wide range of useful hardness and strength levels.

2. ASME B18.2.1 Thread pitch per inch

Coarse Thread Series (UNC/UNRC) is the most common designation for general application bolts and nuts. Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in adverse conditions and facilitate quick assembly.

Fine Thread Series (UNF/UNRF) is commonly used in precision applications. Because of the larger tensile stress areas, they have high tension strength. However, a longer engagement is required for fine thread applications than for coarse series threads to prevent stripping.

8 – Thread Series (8UN) is the specified thread forming method for several ASTM standards including A193 B7, A193 B8/B8M, and A320. This series is used for diameters one inch and above.

Coarse Thread Series - UNC Fine Thread Series - UNF 8-Thread Series - 8UN
Nominal Size and Threads Per In. Basic Pitch Dia. Section at Minor Dia. Tensile Stress Area Nominal Size and Threads Per In. Basic Pitch Dia. Section at Minor Dia. Tensile Stress Area Nominal Size and Threads Per In. Basic Pitch Dia. Section at Minor Dia. Tensile Stress Area
In. Sq in. Sq in. In. Sq in. Sq in. In. Sq in. Sq in.
38 - 16 0.3344 0.0678 0.0775 38 - 24 0.3479 0.0809 0.0878 -- -- -- -- --
716 - 14 0.3911 0.0933 0.1063 716 - 20 0.4050 0.1090 0.1187 -- -- -- -- --
12 - 13 0.4500 0.1257 0.1419 12 - 20 0.4675 0.1486 0.1599 -- -- -- -- --
916 - 12 0.5084 0.162 0.182 916 - 18 0.5264 0.189 0.203 -- -- -- -- --
58 - 11 0.5660 0.202 0.226 58 - 18 0.5889 0.240 0.256 -- -- -- -- --
34 - 10 0.6850 0.302 0.334 34 - 16 0.7094 0.351 0.373 -- -- -- -- --
78 - 9 0.8028 0.419 0.462 78 - 14 0.8286 0.480 0.509 -- -- -- -- --
1 - 8 0.9188 0.551 0.606 1 - 12 0.9459 0.625 0.663 1 - 8 0.9188 0.551 0.606
118 - 7 1.0322 0.693 0.763 118 - 12 1.0709 0.812 0.856 118 - 8 1.0438 0.728 0.790
114 - 7 1.1572 0.890 0.969 114 - 12 1.1959 1.024 1.073 114 - 8 1.1688 0.929 1.000
138 - 6 1.2667 1.054 1.155 138 - 12 1.3209 1.260 1.315 138 - 8 1.2938 1.155 1.233
112 - 6 1.3917 1.294 1.405 112 - 12 1.4459 1.521 1.581 112 - 8 1.4188 1.405 1.492
-- -- -- -- -- -- -- -- -- -- 158 - 8 1.5438 1.68 1.78
134 - 5 1.6201 1.74 1.90 -- -- -- -- -- 134 - 8 1.6688 1.98 2.08
-- -- -- -- -- -- -- -- -- -- 178 - 8 1.7938 2.30 2.41
2 - 412 1.8557 2.30 2.50 -- -- -- -- -- 2 - 8 1.9188 2.65 2.77
214 - 412 2.1057 3.02 3.25 -- -- -- -- -- 214 - 8 2.1688 3.42 3.56
212 - 4 2.3376 3.72 4.00 -- -- -- -- -- 212 - 8 2.4188 4.29 4.44
234 - 4 2.5876 4.62 4.93 -- -- -- -- -- 234 - 8 2.6688 5.26 5.43
3 - 4 2.8376 5.62 5.97 -- -- -- -- -- 3 - 8 2.9188 6.32 6.51
314 - 4 3.0876 6.72 7.10 -- -- -- -- -- 314 - 8 3.1688 7.49 7.69
312 - 4 3.3376 7.92 8.33 -- -- -- -- -- 312 - 8 3.4188 8.75 8.96
334 - 4 3.5876 9.21 9.66 -- -- -- -- -- 334 - 8 3.6688 10.11 10.34
4 - 4 3.8376 10.61 11.08 -- -- -- -- -- 4 - 8 3.9188 11.57 11.81

3. Stainless Steel Bolt Nut Washer package:

Cold Galvanizing Duplex Stainless Steel Fasteners 8TPI 16UN UNC UNF ISO9001


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