J Bolt

J Bolt – Product Details

JMIKS Fasteners supplies J bolts (J type foundation bolts) in stainless steel SS 304, SS 316 and SS 202, mild steel 4.6 and 5.6, and high tensile 8.8 and 10.9. Sizes run from M6 to M36 and ¼” to 1-1/4″ BSW. J bolts are cast into concrete to hold columns, machines and poles.

Specifications

Standard : DIN / IS / AISI
Size : Metric- M6 To M36 / BSW : ¼” to 1-1/4”
Material Grade: Stainless Steel (SS304 / SS316 / SS202) / MS (4.6 / 5.6) / High Tensile (8.8 / 10.9)
Length : 6mm to 250mm

What Is a J Bolt?

A J bolt is a foundation (anchor) bolt bent into a J shape. The hooked end is cast into concrete, and the threaded end sticks out to hold a column base plate, machine or pole with nuts and washers. The hook stops the bolt from pulling out of the concrete. Foundation bolts are covered by IS 5624.

J Bolt Materials

Mild steel 4.6 / 5.6 for general foundations, sheds and light structures
High tensile 8.8 / 10.9 for heavy columns, machinery and towers
Stainless steel SS 304 / SS 316 for wet, coastal or chemical areas, and SS 202 for dry, indoor use

For outdoor and buried use, mild steel J bolts are usually hot dip galvanized.

Applications

Steel column base plates and pre-engineered buildings
Street light, signboard and high-mast poles
Machine and pump foundations
Transmission and telecom towers
Solar structure foundations

J Bolt FAQs

What information do I need to order J bolts?

Send the diameter, total length, thread length, hook length, material grade, finish and quantity. A drawing or sketch helps us quote correctly. You can send it through our enquiry form.

What is the difference between a J bolt and an L bolt?

Both are bent foundation bolts. A J bolt has a curved hook, while an L bolt has a 90° bend. Both hold in concrete in the same way.

How deep should a J bolt be set in concrete?

The embedment depth depends on the bolt size, the load and the concrete grade, and is set by the structural engineer. Always follow the approved drawing.