3/16'' Blue Coated Concrete Screws with Flat Head, Corrosion Resistant Fasteners

Product Description

Our Advantages

Product Description

Union Concrete Screws

Name

3/16'' Blue Coated Concrete Screws with Flat Head, Corrosion Resistant Fasteners

Material

Carbon Steel

Size

4.8-9.5 or non-standard as request&design

Length

25-150 mm or non-standard as requested

Surface Treatment

Ruspert, Plain, Passivation, Polishing, Customized

OEM

Made in China

Lead Time

10-25 Days

 

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

Stainless Steel Bolts

are a versatile fastener made from stainless steel alloys. With their unparalleled strength, corrosion resistance, and durability, stainless steel bolts have become a staple across countless industries.

Stainless steel contains a minimum of 10.5% chromium content. This chromium forms a passive layer of chromium oxide when exposed to oxygen, preventing further corrosion and rust. Other elements like nickel, molybdenum, titanium, copper, and nitrogen can also be added to enhance properties like strength, ductility, and high temperature resistance. This alloying produces a material that is both strong and "stainless".

There are many compelling benefits that make stainless steel bolts a top choice:
Superior Corrosion Resistance
High Strength
Temperature Resistance
Aesthetic Appearance
Low Maintenance

Stainless bolts feature all the standard bolt head styles:
Hex: 6-sided head for wrench gripping with maximum torque transfer. The most common head type.
Socket: Recessed head allowing tight spaces and high torque with an Allen wrench.
Button: Low profile rounded head for smooth surfaces. Requires a socket wrench.
Flat: Flat recessed head for a flush surface. Needs a spanner wrench for torqueing.
Oval: Oval shaped head to prevent rolling. Used in vibrating machinery. Needs a socket wrench.
Factors to Consider When Selecting Bolts

In conclusion, stainless steel bolts offer unmatched corrosion resistance, strength, appearance, and low maintenance when constructed properly with the right alloys. Paying attention to engineering requirements and operating conditions allows selecting an optimal grade and style of stainless bolt for the application. With proper selection, stainless steel bolts will provide reliable, long-lasting service across industries.

 

Product Application

Company Profile

Quality Control

 

Certifications

 

FAQ