Foundation Bolt Tolerance

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Jaisalmer
Category Foundation Bolts
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Details of C Type Square Foundation Bolt

Foundation Bolt Tolerance

1. Bolt Diameter Tolerance

(As per IS / ISO manufacturing practice)

2. Bolt Length Tolerance

Bolt LengthTolerance
Up to 500 mm±2 mm
500 – 1500 mm±3 mm
Above 1500 mm±5 mm

3. Thread Tolerance

Metric Threads: 6g (external) as per ISO 965 / IS 4218

UNC / UNF Threads: 2A class

Thread Length: ±2 mm

4. Projection Above Concrete

Bolt DiameterTolerance
M12 – M24±5 mm
M27 – M48±8 mm
Above M48±10 mm

5. Bolt Center-to-Center (Position) Tolerance

ApplicationTolerance
Building steel columns±3 mm
Heavy machinery base±2 mm
Towers / cranes±2 mm
General civil works±5 mm

6. Verticality (Plumbness)

Maximum deviation: 1 in 100

Example: For 1000 mm bolt length → max deviation 10 mm

7. Bent Portion Tolerance (L / J Type)

Bend angle: ±2°

Bend radius: As per standard or drawing (±3 mm)

8. Plate Welded Bolt Tolerance

Plate size: ±2 mm

Plate thickness: ±0.5 mm

Plate squareness: ±1 mm

Weld alignment: ±2 mm

9. Galvanizing Allowance

Diameter increase after HDG: +0.3 to +0.6 mm

Threads generally over-tapped or chased after galvanizing

LG Industries manufactures Foundation Bolts in Ahmedabad, Gujarat (India)

Offered Product

C Type Square Foundation Bolt

Since 2013, LG Industries In Ahmedabad, India, Has Been A Trusted Manufacturer And Supplier Of High-quality C Type Square Foundation Bolts. We Provide Reliable Fastening Solutions For Various Industrial, Construction, And Infrastructure Applications. These Bolts Are Designed To Offer Strong Anchoring, Stability, And Lasting Performance, Making Them Well-suited For Heavy Engineering, Power Plants, Petrochemical, Oil And Gas, And Construction Projects.Our C Type Square Foundation Bolts Are Mad... Read more
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Plot No. 5, Krishina Industrial Park 4, Kubadthal, Daskroi,
Ahmedabad - 382430
Gujarat (India)
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