Spiral EMI Shielding Gasket ARC-SG

Our Spiral EMI Shielding Gasket is an economical and reliable EMI/RFI shielding solution designed for electronic enclosures, communication devices, precision equipment, and other applications requiring high-performance electromagnetic shielding. The product is manufactured using a spiral-formed metal strip, providing excellent elasticity, durability, and long-term resistance to compression set.

Features

Material Options:
Stainless steel (excellent spring memory and corrosion resistance)
Beryllium copper (high conductivity and superior shielding performance)
Titanium (lightweight, high corrosion resistance)

Surface Treatments / Coatings (optional):
Tin plating
Nickel plating
Aluminum coating
Other custom coatings available on request

Shielding Performance:
Provides moderate to high shielding effectiveness across a wide frequency range. Actual performance depends on installation geometry and compression.

Elastic Properties:
The spiral structure maintains stable spring force and minimizes permanent deformation under repeated compression.

Installation Method:
Designed for groove mounting, ensuring easy installation and secure fit.

Customization:
Available in various diameters, strip widths, coil densities, and force levels. Custom designs and materials can be produced according to customer requirements.

Applications

Electronic device enclosures
Control cabinets and communication equipment
Semiconductor process equipment
Instruments requiring EMI/RFI protection

ARC-SG Spiral EMI Gasket – Metric Specification List (H / M / L in One Row)

Metric Diameter (mm)	Inch	Quick-Shield Part No.	ARC-SG (H / M / L)
0.864 mm	0.034"	NI-02 / NM-02 / NL-02	SG-086SHN / SG-086SMN / SG-086SLN
1.194 mm	0.047"	NI-03 / NM-03 / NL-03	SG-119SHN / SG-119SMN / SG-119SLN
1.600 mm	0.063"	NI-04 / NM-04 / NL-04	SG-160SHN / SG-160SMN / SG-160SLN
1.778 mm	0.070"	NI-070 / NM-070 / NL-070	SG-178SHN / SG-178SMN / SG-178SLN
1.981 mm	0.078"	NI-05 / NM-05 / NL-05	SG-198SHN / SG-198SMN / SG-198SLN
2.388 mm	0.094"	NI-06 / NM-06 / NL-06	SG-239SHN / SG-239SMN / SG-239SLN
2.616 mm	0.103"	NI-103 / NM-103 / NL-103	SG-262SHN / SG-262SMN / SG-262SLN
2.769 mm	0.109"	NI-07 / NM-07 / NL-07	SG-277SHN / SG-277SMN / SG-277SLN
3.175 mm	0.125"	NI-08 / NM-08 / NL-08	SG-318SHN / SG-318SMN / SG-318SLN
3.531 mm	0.139"	NI-139 / NM-139 / NL-139	SG-353SHN / SG-353SMN / SG-353SLN
3.581 mm	0.141"	NI-09 / NM-09 / NL-09	SG-358SHN / SG-358SMN / SG-358SLN
4.369 mm	0.172"	NI-11 / NM-11 / NL-11	SG-437SHN / SG-437SMN / SG-437SLN
4.750 mm	0.187"	NI-12 / NM-12 / NL-12	SG-475SHN / SG-475SMN / SG-475SLN
6.350 mm	0.250"	NI-16 / NM-16 / NL-16	SG-635SHN / SG-635SMN / SG-635SLN
7.925 mm	0.312"	NI-20 / NM-20 / NL-20	SG-792SHN / SG-792SMN / SG-792SLN

Complete Model Code Definition (6-Digit Structure, Metric Version)

Digit	Parameter	Description	Examples
①②③	Size	Metric diameter code (mm × 100), rounded, padded to 3 digits	086, 160, 635
④	Material	S = Stainless steel, B = Beryllium copper, T = Titanium	S, B, T
⑤	Force Level	H = High, M = Medium, L = Low	H, M, L
⑥	Coating	N = None, T = Tin, I = Nickel, A = Aluminum	N, T, I, A
⑦	Core Type	(Optional) blank = No core, G = Silicone core, P = Silicone tube core, E = Epoxy core	blank, G, P, E

Core type (⑦) is optional. If omitted, the gasket is considered no-core. All model numbers begin with the prefix “SG-” (Spiral Gasket).

Example Models and Definitions (Metric-Based Codes)

Model	Meaning
SG-239SMNN	2.388 mm (0.094"), Stainless steel, Medium force, No coating, No core
SG-353BMLG	3.531 mm (0.139"), Beryllium copper, Low force, Nickel plating, Silicone core
SG-318TLIA	3.175 mm (0.125"), Titanium, High force, Aluminum coating, Epoxy core
SG-318THNP	3.175 mm (0.125"), Titanium, High force, No coating, Silicone tube core
SG-635SMNI	6.350 mm (0.250"), Stainless steel, Medium force, Nickel plating, No core