Iron Round Head Rivets

Iron round head rivets are a fastener widely used in industrial manufacturing and everyday life. Their unique design and excellent performance make them a top choice in many fields. Nuote Metals specializes in the production of iron round head rivets. The dimensions of our rivets strictly adhere to the tolerances specified on the customer's drawings. Each process is subject to a quality inspection cycle to ensure the quality of the final product. We have dozens of cold heading machines, with a daily output of tens of millions of rivets.

Send Inquiry

Product Description

Iron Round Head Rivets – Engineered for Strength, Built for Reliability

For permanent, load-bearing joints that withstand vibration and shock, Iron Round Head Rivets deliver. At Nuote Metals, we manufacture these classic fasteners from low-carbon steel, combining proven strength with a dome-shaped head that distributes load evenly across the joint surface.

What Are Iron Round Head Rivets?

An Iron Round Head Rivet is a permanent fastener with a domed, hemispherical head and a solid or semi-tubular shank. The round head provides a large bearing surface that prevents pull-through and uniformly distributes clamping force.

Key characteristics:

Head shape: Dome / hemispherical
Material: Low-carbon steel (commonly called "iron" in the fastener industry)
Fastening: Permanent deformation – the shank is upset to form a second head
Best for: Structural joints, heavy machinery, high-shear applications

Industry note: "Iron" and "steel" are used interchangeably for low-carbon steel rivets.

Technical Specifications – Iron Round Head Rivets

Nuote Metals produces Iron Round Head Rivets to DIN 124 (10–36mm), DIN 660 (1–8mm), and GB/T 867.

Dimensional Specifications

Parameter	DIN 124 (10–36mm)	DIN 660 (1–8mm)	Tolerance
Nominal Diameter (d)	10 – 36 mm	1 – 8 mm	±0.1mm (≤10mm)
Head Diameter (dk)	≈ 1.6 × d	≈ 1.6 × d	±0.2mm
Head Height (k)	≈ 0.7 × d	≈ 0.7 × d	±0.15mm
Length (L)	16 – 80 mm (custom)	2 – 50 mm (custom)	±0.5mm
Hole Diameter (dh)	d + 0.1–0.2mm	d + 0.1–0.2mm	–

Mechanical Properties (Low-Carbon Steel)

Property	Value	Test Method
Tensile Strength	330 – 450 MPa	ASTM A31 / EN ISO 6892
Yield Point (Grade A)	≥ 160 MPa (23,000 psi)	ASTM A31
Yield Point (Grade B)	≥ 200 MPa (29,000 psi)	ASTM A31
Shear Strength	250 – 350 MPa	ASTM F606
Hardness	80 – 95 HRB	Rockwell B
Elongation	≥ 20%	ASTM A31

Round Head vs. Flat Head – Which One?

Feature	Round Head (Dome)	Flat Head
Head profile	Raised dome	Nearly flush
Bearing surface	Large – excellent load spread	Moderate
Pull-out resistance	Superior – mechanical lock	Lower
Impact resistance	30% higher energy absorption	Standard
Best use	Structural joints, heavy loads	Flush-finish interiors

Choose Round Head when vibration and impact are concerns; choose Flat Head when surface smoothness is the priority.

Solid vs. Semi-Tubular Iron Round Head Rivets

Nuote Metals offers both configurations.

Solid Body

Fully solid shank
Setting force: 100% (baseline)
Shear strength: Maximum (100% of material capacity)
Best for: High-stress structural joints, safety-critical applications

Semi-Tubular Body

Partial hole at the tail (20–40% depth)
Setting force: 60–70% of solid
Shear strength: 80–90% of solid
Best for: High-volume production, lower-force automation

Feature	Solid	Semi-Tubular
Shank	100% solid	20–40% hollow at tail
Setting force	100%	60–70%
Shear strength	100%	80–90%
Production speed	Slower	Faster – ideal for automation
Cost	Higher	Lower
Best use	Load-critical structural	High-volume general assembly

Quality Assurance – Why Choose Nuote Metals

Nuote Metals is an ISO 9001:2015 certified manufacturer with a fully equipped in-house QC center. Every batch of Iron Round Head Rivets undergoes rigorous testing.

Our Testing Capabilities

Universal Tensile & Shear Tester (up to 1000KN)
Vickers / Rockwell Hardness Tester
Metallurgical Microscope – grain structure analysis
Salt Spray Corrosion Chamber
Coating Thickness Gauge
2D Optical Profile Projector – dimensional verification

Certifications & Standards

ISO 9001:2015
DIN 124 / DIN 660 compliance
ASTM A31 – Steel Rivets and Bars
ASTM F16 – Fastener Standards

Frequently Asked Questions About Iron Round Head Rivets

Q1: What is the difference between "iron" and "steel" round head rivets?

A: In the fastener industry, "iron" and "steel" are used interchangeably for low-carbon steel rivets. Both refer to the same base material – low-carbon steel with carbon content below 0.25%. At Nuote Metals, our Iron Round Head Rivets meet or exceed ASTM A31 Grade A and B requirements. The term "iron" is traditional and widely used in structural applications, while "steel" appears more in engineering specs. Functionally, they are identical.

Q2: What is the Minimum Order Quantity (MOQ) for Iron Round Head Rivets?

A: Our standard MOQ for Iron Round Head Rivets is 10,000 pieces for standard sizes. However, we accept trial orders as small as 1,000 pieces at a slightly adjusted unit price for qualification purposes. For custom sizes, the MOQ may vary – please contact us with your specifications. Free samples of standard sizes are available for quality evaluation (shipping cost borne by the customer).

Q3: How does the impact resistance of round head rivets compare to other head types?

A: The round head design significantly outperforms flat heads in impact-prone applications. Because the dome has more material mass over the shank center, it absorbs and distributes impact energy over a larger area. In drop‑weight tests, Iron Round Head Rivets show approximately 30% higher energy absorption than flat head equivalents of the same diameter and material. This makes them the preferred choice for heavy machinery, railroad, and mining equipment where vibration and shock are constant.