China metric jam nuts wholesale supplier

  • China metric jam nuts
  • China metric jam nuts
  • China metric jam nuts
Hex Jam Nut
  • 7-35 DAYS
  • 5000 TONS

Material: Carbon Steel, Alloy Steel, Stainless Steel
Standard: ASME/ANSI B18.2.2; DIN439
Measurement system: INCH, Metric
Size: 1/4”-3” M6 – M52
Grade / Class:ASTM A563 Gr. A; SAE J995 Gr.2
Thread: M, UNC, UNF
Finish: Black Oxide, Zinc Plated(Clear/Blue/Yellow/Black),H.D.G , Y.Z.P ,Plain, Nickel, Chrome.

Hex Jam Nuts

Hex jam nuts are thinner than a standard hex nut but have the same dimension across the flats and corners. A jam nut can be threaded onto a bolt and run tight against the standard nut which will lock the nut in place and prevent it from backing off. Jam nuts are sometimes used for leveling purposes as well.

How does a jam nut work?

The jam nut essentially acts as the "other object", as the two nuts are tightened against each other. They can also be used to secure an item on a fastener without applying force to that object. This is achieved by first tightening one of the nuts onto the item.

Product Parameters

China metric jam nuts

Product name: Hex Jam Nuts

Material: Carbon Steel, Alloy Steel, Stainless Steel

Standard:  ASME/ANSI B18.2.2; DIN439

Measurement system: INCH, Metric

Size:  1/4”-3” M6 – M52

Grade / Class:  ASTM A563 Gr. A; SAE J995 Gr.2

Thread: M, UNC, UNF

Finish: Black Oxide, Zinc Plated(Clear/Blue/Yellow/Black),H.D.G , Y.Z.P ,Plain, Nickel, Chrome.


Product name

Hex Jam Nuts

Place of origin


Brand Name



Qingdao or according to requirement

Delivery time

Normally in 7-35 days, according to quantity


500kgs for each specification


According to customer’s requirement

Our advantage:

One-stop shopping; 
High quality; 
Competitive price; 
Timely delivery; 
Technical support; 
Supply Material and Test Reports;

Samples for free

 Hex jam nut is a part that tightly joins the mechanical equipment. Through the inner thread, the same size nut and hex jam nut bolt can be connected together.


Main feature


Easy to install

No need for gaskets for integrity

Easy to disassemble


Made of medium carbon steel

Can be used with 8.8, 10.9 and other high strength bolts

Detected by Dynamic Test


Applications Automotive - cars, trucks, buses, compressors, construction, machinery, wind power equipment, agricultural machinery foundry, drilling equipment, marine industry, military, mining equipment, oil drilling rigs (onshore or offshore), Utility, rail transit, transmission system, metallurgical equipment chisel, rock hammer

Three advantages of hex jam nut:


First, superior anti-vibration performance: when the thread is tightened, the top thread of the bolt is tightly inserted into the 30°wedge-shaped bevel of the nut, and the normal force generated by the wedge-shaped inclined surface is applied to the bolt. The axis is at an angle of 60° instead of 30°. Therefore, the normal force generated when the hex jam nut is tightened is much larger than that of the ordinary standard nut, and it has great anti-loose and anti-vibration capability.


Second, the wear resistance and shear resistance are strong: the 30° bevel of the nut thread base can evenly distribute the nut locking force on the threads of all the thread, because the pressing force on each thread surface is evenly distributed, so The nut can better solve the problem of thread wear and shear deformation.


Third, the repeated use performance is good: a large number of uses indicate that the lock nut is repeatedly tightened and disassembled after repeated times, and the locking force is still not reduced, and the original locking effect can be maintained.

Packaging Details:


30,40,50CTNS/PALLET 15KGS/CTN0.35
36,48CTNS/PALLET  (10-22)KGS/CTN0.36

B. According to customer special demand.

China metric jam nuts

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