M3-M60 Stainless Steel Carriage Bolt Industrial Round Head Bolts

• Customization: Available
• Material: Stainless Steel
• Type: Round Head
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: A2-70.A4-80
• Application: Solar Mounting
• Finish: Zinc Plated, Ruspert, Dacromet, Customized
• Delivery: Sea Freight, Air, Train, Express
• Certification: ISO9001, BSCI
• Sample: Yes
• ODM/OEM: Accept
• Transport Package: Carton Boxes + Pallets
• Specification: M3-M60
• Trademark: UN
• Origin: China
• HS Code: 7318151001
• Production Capacity: 700tons/Month

Product Description

Our Advantages

 

Product Description

Union Stainless Steel Carriage Bolt

Name

Carriage bolt DIN603

Material

Stainless Steel

Size

M3-M60 or non-standard as request&design

Surface Treatment

Plain, Passivation,Polishing,Customized

OEM

Made in China

Lead Time

Based on quantity

 

Stainless Steel Chemical Composition
Grade	C  ≤	Si  ≤	Mn  ≤	P  ≤	S  ≤	Ni	Cr	Mo	Other
201	0.15	1.00	5.5-7.5	0.060	0.03	3.5-5.5	16-18		N≤0.25
304	0.08	1.00	2.00	0.045	0.03	8.0-10.0	18-20
304L	0.03	1.00	2.00	0.045	0.03	8.0-12.0	18-20
321	0.08	1.00	2.00	0.045	0.03	8.0-13.0	17-19		Ti≤5*C%
316	0.08	1.00	2.00	0.045	0.03	10.0-14.0	16-18	2-3
316L	0.03	1.00	2.00	0.045	0.03	10.0-15.0	16-18	2-3
309S	0.08	1.00	2.00	0.045	0.03	12.0-15.0	22-24
410	0.15		1.00		0.03	-	11.5-13.5
420	0.26-0.4		1.00		0.03	-	12-14
430	0.12	0.75	1.00	0.040	0.03	-	16-18

 

Main Fastener Coating
Types	Application	Spray Test Hours	Characteristics
Zinc, Electroplated	All Metal	96Hours	Lower cost and bright surface
Hot Dip Galvanized	All Metal	96Hours	Low corrosion rate and resists mechanical damage.
Electro Nickel	All Metal	200Hours	Flexibility in plating volume and thickness
Mechanical Plating	Steel	1000Hours	Smooth finish with high anti-corrosion grade
Black Oxide	All Metal	3-5Hours	Cheap
Dacrotized	Steel	1000Hours	Pollution-free ceramic coating
Passivation	Stainless Steel	/	Dissolved iron contaminants
Wax	Stainless Steel & Plated Fasteners	Fair, used as a lubricate	Used for ease of assembly

Solar Mounting Products

Critical Solar Mounting Hardware: Screws, , and Nuts

High-quality solar mounting relies on specialty screws, bolts, and nuts to securely fasten photovoltaic panels and racks. These components bear the mechanical loads, prevent loosening from wind vibration, and resist corrosion from outdoor exposure.

Bolts
Bolts join frame components and solar panels together with corresponding washers and nuts. Many specialized varieties exist for solar applications.

Carriage Bolts
Rounded smooth heads to prevent damage to material surfaces while being installed. A square portion just below the head grabs into the assembly and prevents spinning.

In addition to these foundational solar mounting fasteners, components like racking rails, clamps, and roof attachments rely on proper use of screws, bolts, washers, and nuts to create safe and secure installations. Stainless steel hardware and UV-resistant components ensure long-lasting performance for decades of exposure to outdoor elements. With the right selection of mounting products, solar installers can efficiently assemble PV systems that will stand the test of time.

Product Application

 

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