Day 4 - 🔩 Tensile Strength vs Torque — What Every Industrial Buyer & Seller Must Know About Fasteners | Fasteners Training

Lead Content Writer, Arslok
Jul 14, 2025
3 min read

In the world of fasteners, numbers mean everything. A single bolt failure can shut down a line, derail a machine, or damage an entire brand’s credibility. And yet, the most misunderstood — and misused — concepts in the industry are tensile strength and torque.

Let’s decode the truth behind these two critical parameters — and why mastering them is not just technical knowledge, but business survival.

⚙️ What is Tensile Strength?

Tensile Strength is the maximum load a fastener can withstand before breaking when pulled apart. It’s measured in MPa (megapascals) or N/mm², and it tells you how strong your bolt truly is.

For example, a grade 8.8 bolt has a tensile strength of 800 MPa — meaning it can resist an axial pull of 800 N/mm² before snapping.

🔧 What is Torque?

Torque is the rotational force used to tighten a fastener. It’s measured in Nm (Newton meters) and helps achieve proper clamping force — the real strength of a joint.

Too little torque? The bolt vibrates loose.Too much? The bolt stretches or even breaks.

Correct torque ensures the bolt works below its tensile limit — but within its elastic limit — where it can hold pressure, resist fatigue, and perform over time.

🚨 Why This Matters for Industrial Manufacturers

Fastener failure isn’t always about poor quality. It’s about poor application knowledge.

Using a high-tensile bolt in a soft fixture can lead to cracking or warping
Overtorquing a mild steel bolt reduces load cycle life and causes failure under vibration
Mismatched torque wrenches or untrained fitters = silent operational risk

And in a world where margins are tight, quality losses, rework, or product recalls are the hidden killers of profitability.

🏭 The Problem: Most Teams Sell or Use Fasteners Without Truly Understanding Them

Whether it’s the purchase team, on-ground fitter, distributor, or sales engineer — the majority don’t receive technical training on:

Bolt grades and strength classes
Correct torque tables
Compatibility of bolts and washers
Applications of lock nuts, nyloc, and special coatings
International standards and test reports

The result? Fasteners become a commodity. Sales become a price war. And quality becomes “good enough.”

🎓 Introducing: Arslok Fasteners Training Program

At Arslok, we don’t just build brands for fastener manufacturers —We build knowledge, confidence, and authority.

✅ Our Training Covers:

Fastener Basics to Advanced Technical Knowledge
Torque-Tension Relationship Explained with Industry Examples
Fastener Failures & Troubleshooting
Buyer Objection Handling (for Sales Teams)
How to Sell Value — Not Just Cost

Whether you’re a manufacturer, distributor, OEM supplier, or export house, this training is designed to upgrade your team’s understanding — and your customer’s trust.

👨‍🏫 Lead Trainer: Maninder Singh Sond

With 22+ years of experience in fasteners, tools, and industrial sales, Maninder has trained 1000+ professionals and helped multiple brands scale from ₹10 Cr to ₹100 Cr.

His workshops are simple, powerful, and field-tested — designed to bring clarity in chaos, and strategy in selling.