Company Details

  • Shijiazhuang Bang dong Pipeline Technology Co,Ltd.

  •  [Hebei,China]
  • Business Type:Manufacturer
  • Main Mark: Africa , Asia , East Europe , Europe , Middle East , North Europe , West Europe
  • Exporter:91% - 100%
  • Certs:CE, ISO9001
  • Description:2h Heavy Hex Nuts,B7 Stud Bolt,Fasteners Bolts and Nuts
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Shijiazhuang Bang dong Pipeline Technology Co,Ltd.

2h Heavy Hex Nuts,B7 Stud Bolt,Fasteners Bolts and Nuts

Home > Products > Bolts & Nuts > Stud Bolt > Bolts Screws and Studs Fasteners

Bolts Screws and Studs Fasteners

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    Payment Type: L/C,T/T
    Incoterm: FOB,CFR,CIF
    Min. Order: 100 Piece/Pieces
    Delivery Time: 20 Days

Basic Info

Model No.: Fasteners

Material: Carbon Steel

Type: Hexagon Head

Connection: Common Bolt

Hinged Bolts: Hexagonal

Standard: DIN, GOST, GB, ANSI

Grade: 10.9

Application: Machinery

Finish: Hot Galvanizing

Additional Info

Packaging: Wooden Case or as per buyer's requirements

Productivity: 10000pcs/month

Brand: Bangdong

Transportation: Ocean,Land,Air,Train/TNT/DHL

Place of Origin: Cangzhou,China

Supply Ability: 10000pcs/month

Certificate: CE/API/ISO

HS Code: 7318159090

Port: Shanghai Port,Beijing Air Port,Tianjin New Port

Product Description

Bolts Screws and Studs Fasteners

If you require any Bolts Screws and Studs Fasteners , 2h Heavy Hex Nuts , B7 Stud Bolt , Stud Bolts With 2 Nuts, Hex Bolts, 2H HDG Nuts, Galvanized Bolts and Nuts Please contact us freely .

Bolts & Nuts for flanged connections

Types of Bolts

In Petro and chemical industry for flange connections Stud Bolts and Hex Bolts are used. The Stud Bolt is a threaded rod with 2 heavy hexagon nuts, while the Hex Bolt has a head with one nut. Nuts and head are both six sided.

Stud Bolts general

The quantity of bolts for a flange connection will be given by the number of bolt holes in a flange, diameter and length of bolts is dependent of flange type and Pressure Class of flange.

Stud Bolt length are defined in Asme B16.5 standard. The length in inches is equal to the effective thread length measured parallel to the axis, from the first to the first thread without the chamfers (points). First thread is defined as the intersection of the major diameter of the thread with the base of the point.

Measuring lengths of Stud Bolts and Hex Bolts


  • The length of metric Stud Bolts measured parallel to axis, is the distance from each Stud Bolt, including the point.
  • To allow the use of hydraulic tensioning equipment, larger dimension studs shall be often one diameter longer than "standard". That bolts to have plastic End Cap protection.

Threads of Stud Bolts

Bolts threading are defined in ASME B1.1 Unified Inch Screw Threads, (UN and UNR Thread Form). The most common thread is a symmetrical form with a V-profile. The included angle is 60°. This form is widely used in the Unified thread (UN, UNC, UNF, UNRC, UNRF) form as the ISO / metric threads.
The advantage of a symmetrical threads is that they are easier to produce and inspect compared with non-symmetrical threads. These are typically used in general-purpose fasteners.
Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter.


  • Coarse thread series (UNC/UNRC) is the most widely used thread system and applied in most of the screws, bolts and nuts. Coarse threads are used for threads in low strength materials such as iron, mild steel, copper and softer alloy, aluminium, etc.. The coarse thread is also more tolerant in adverse conditions and facilitate quick assembly.
  • Fine thread series (UNF/UNRF) is commonly used in precision applications and in there where require a higher tensile strength than the coarse thread series.
  • 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 mostly used for diameters one inch and above.

Hex Nuts

Hex nuts (dimensional data) are defined in ASME B18.2.2, and even as bolts the threading in ASME B1.1. Depending on a customer specification, nuts must be both sites chamfered or with on one side a washer-face.

Hex Nuts

Dimensions of above mentioned nuts, can be found on page Heavy Hex Nuts of this website.


Materials for Stud Bolts

Dimensions from Stud Bolts are defined in the ASME B16.5 standard. The material qualities for studs are defined in the different ASTM standards, and are indicated by Grade. Frequently used grades are A193 for thread rods and A194 for the nuts.

ASTM A193 covers alloy and stainless steel bolting material for pressure vessels, Valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
ASTM A194 covers a variety of carbon, alloy, and martensitic and austenitic stainless steel nuts. These nuts are intended for high-pressure or high-temperature service, or both.

Marking of Stud Bolts

Thread rods and nuts must be marked by the manufacturer with a unique identifier to identify the manufacturer or private label distributor, as appropriate. Below a number of ASTM examples.

Marking of Stud Bolts

Grades of Stud Bolts

Below a table with materials and grades for flanges, thread rods (bolts) and nuts, arranged on design temperature, flanges, thread rods and recommended nuts.

-195° to 102°C ASTM A182
Gr. F304, F304L, F316,
F316L, F321, F347
A320 Gr.B8 Class2 A194 Gr.8A
-101° to -47°C ASTM A350
A320 Gr.L7 A194 Gr.7
-46° to -30°C ASTM A350
A320 Gr.L7 A194 Gr.7
-29° to 427°C ASTM A105 A193 Gr.B7 A194 Gr.2H
428° to 537°C ASTM A182
Gr.F11, F22
A193 Gr.B16 A194 Gr.2H
538° to 648°C ASTM A182
Gr.F11, F22
A193 Gr.B8 Class1 A194 Gr.8A
649° to 815°C ASTM A182
Gr. F304H, F316H
A193 Gr.B8 Class1 A194 Gr.8A
Note: Materials in the table above are being provided for guidance purposes

Zinc Plated
Hot Dip Galvanized
Stainless steel
Dracomet, TIN, Client Specific Requirements
Standard: ASTM / ASME / BS / DIN / JIS / BS EN ISO Material : Carbon Steel, Mild Steel, Alloy Steel & Stainless Steel.
Dia Range: M10 TO M100 AND 3/8" TO 4"
Threads: ANSI B 1.1 Class 2A Fit (Imperial) , ANSI B 1.13M 6g (Metric)

A193 B7/A194 2H Stud Bolts and Nuts
Materials: A193 B7/A194 2H, A193 B7M/A194 2HM, A320 L7/A194 7 and A320 L7M/A194 7M
Surface finish: black,cadmium and Xylan Fluoroploymer Coated
Standards: ANSI/ASME
Size: 1/4 to 4 inches (length to 20-inch maximum)
Color: Black, Green, Blue, Red and others


Looking for ideal 2h Heavy Hex Nuts Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the B7 Stud Bolt are quality guaranteed. We are China Origin Factory of Fasteners Bolts and Nuts. If you have any question, please feel free to contact us.

Product Categories : Bolts & Nuts > Stud Bolt

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