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PTFE Fasteners PTFE Stud Bolt and Nut, PTFE Hex Bolt
PTFE Fasteners PTFE Stud Bolt and Nut, PTFE Hex Bolt
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PTFE Fasteners PTFE Stud Bolt and Nut, PTFE Hex Bolt

 

PTFE Fasteners,PTFE Coated Stud Bolts and NutStud bolt ASTM A193 B7, Nut ASTM A194 2H, surface coating: PTFE

PTFE Fasteners,PTFE Coated Stud Bolts and Nut,Blue PTFE

PTFE Fasteners,PTFE Coated Stud Bolts and Nut, Red PTFE

PTFE Fasteners,PTFE Coated Stud Bolts and Nut, Yellow PTFE 


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.

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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.

DESIGN
TEMP.

FLANGES

GRADE
THREAD RODS

GRADE
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
Gr.LF3

A320 Gr.L7

A194 Gr.7

-46° to -30°C

ASTM A350
Gr.LF2

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

DESIGN
TEMP.

FLG'S

GRADE
THREAD RODS

GRADE
NUTS