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Wire Mesh Gaskets

wire mesh gasketingAll Mesh EMI-RFI knitted wire mesh gaskets are available in various cross sections to satisfy the many different requirements encountered in shielding applications. The choice between rectangular, round, round with fin or double round with fin depends on the enclosure or equipment to be shielded.

Wire mesh gaskets are provided in a  variety of metals. The most common shapes are rectangular and round but other profiles can be made per request. All of these EMI/RFI strips are provided by the foot and sold on spools in continuous lengths. The shape and material best suited to a set of conditions can be chosen by comparing the specifications shown below.

Features:

  • High EMI/RFI Attenuation Levels: The highest possible attenuation levels are achievable with MAJR’s 1500 EMI/RFI knitted wire mesh gasketing. Attenuation levels beyond 110 dB in the E-field and 60 dB in the H-field are common with shielding gasketing. Higher levels of attenuation are attainable with special materials and special designs.

  • Resilient Gasketing Material: MAJR’s knit wire gasketing material acts like thousands of tiny spring members which are compressed and released with each opening and closing of a cabinet door or enclosure cover. The spring-like gaskets assure long life with consistent point-to-point contact, providing high shielding effectiveness and long life.
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All Mesh Rectangular Strip

HEIGHT
H
WIDTH
W
Monel_Part_Number Ferrous Part_Number(Copper & Tin Plated)
.062 (1.57) .062 (1.57) 1510-06006-31 1510-06006-34
.062 (1.57) .125 (3.18) 1510-06012-31 1510-06012-34
.062 (1.57) .187 (4.75) 1510-06018-31 1510-06018-34
.062 (1.57) .312 (7.92) 1510-06031-31 1510-06031-34
.062 (1.57) .375 (9.53) 1510-06038-31 1510-06038-34
.062 (1.57) .500 (12.70) 1510-06050-31 1510-06050-34
.093 (2.36) .093 (2.36) 1510-09009-31 1510-09009-34
.093 (2.36) .125 (3.18) 1510-09012-31 1510-09012-34
.093 (2.36) .187 (4.75) 1510-09018-31 1510-09018-34
.093 (2.36) .250 (6.35) 1510-09025-31 1510-09025-34
.093 (2.36) .375 (9.53) 1510-09038-31 1510-09038-34
.125 (3.18) .125 (3.18) 1510-12012-31 1510-12012-34
.125 (3.18) .187 (4.75) 1510-12018-31 1510-12018-34
.125 (3.18) .250 (6.35) 1510-12025-31 1510-12025-34
.125 (3.18) .312 (7.92) 1510-12031-31 1510-12031-34
.125 (3.18) .375 (9.53) 1510-12038-31 1510-12038-34
.125 (3.18) .500 (12.70) 1510-12050-31 1510-12050-34
.125 (3.18) .750 (19.05) 1510-12075-31 1510-12075-34
.125 (3.18) 1.000 (25.40) 1510-12100-31 1510-12100-34
.187 (4.75) .187 (4.75) 1510-18018-31 1510-18018-34
.187 (4.75) .250 (6.35) 1510-18025-31 1510-18025-34
.187 (4.75) .312 (7.92) 1510-18031-31 1510-18031-34
.250 (6.35) .250 (6.35) 1510-25025-31 1510-25025-34
.250 (6.35) .312 (7.92) 1510-25031-31 1510-25031-34
.250 (6.35) .375 (9.53) 1510-25038-31 1510-25038-34
.250 (6.35) .500 (12.70) 1510-25050-31 1510-25050-34
.375 (9.53) .375 (9.53) 1510-38038-31 1510-38038-34

Note: Aluminum, brass (silver-plated) and other materials are available in sizes above. Other sizes are available upon request.

 

All Mesh Round Strip

Diameter Monel Part_Number Ferrous_Part_Number
(Copper & Tin Plated)
.062 (1.57) 1511-06000-31 1511-06000-34
.093 (2.36) 1511-09000-31 1511-09000-34
.125 (3.18) 1511-12000-31 1511-12000-34
.156 (3.96) 1511-16000-31 1511-16000-34
.187 (4.75) 1511-18000-31 1511-18000-34
.250 (6.35) 1511-25000-31 1511-25000-34
.312 (7.92) 1511-31000-31 1511-34000-34
.375 (9.53) 1511-38000-31 1511-38000-34
.500 (12.70) 1511-50000-31 1511-50000-34

Note: Aluminum, brass (silver-plated) and other materials are available in sizes above. Other sizes are available upon request.

 

All Mesh Single Round with Fin Strip

HEIGHT
Round Portion
WIDTH
Fin Portion
Monel Part Number Ferrous_Part_Number
(Copper & Tin Plated)
.062 (1.57) .375 (9.53) 1512-06038-31 1512-06038-34
.062 (1.57) .500 (12.70) 1512-06050-31 1512-06050-34
.093 (2.36) .500 (12.70) 1512-09050-31 1512-09050-34
.125 (3.18) .375 (9.53) 1512-12038-31 1512-12038-34
.125 (3.18) .625 (15.88) 1512-12063-31 1512-12063-34
.125 (3.18) .750 (19.05) 1512-12075-31 1512-12075-34
.156 (3.96) .500 (12.70) 1512-16050-31 1512-16050-34
.187 (4.75) .625 (15.88) 1512-18063-31 1512-18063-34
.250 (6.35) .500 (12.70) 1512-25050-31 1512-25050-34
.250 (6.35) .750 (19.05) 1512-25075-31 1512-25075-34
.250 (6.35) 1.000 (25.40) 1512-25100-31 1512-25100-34
.312 (7.92) .625 (15.88) 1512-31063-31 1512-31063-34
.312 (7.92) .875 (22.23) 1512-31087-31 1512-31087-34
.375 (9.53) 1.000 (25.40) 1512-38100-31 1512-38100-34
.437 (11.10) 1.000 (25.40) 1512-44100-31 1512-44100-34
.500 (12.70) 1.000 (25.40) 1512-50100-31 1512-50100-34

Note: Aluminum, brass (silver-plated) and other materials are available in sizes above. Other sizes are available upon request.

All Mesh Double Round with Fin Strip

Round
HEIGHT
Connecting
WIDTH
Monel Part Number Ferrous_Part_Number
(Copper & Tin Plated)
.062 (1.57) .500 (12.70) 1514-06050-31 1514-06050-34
.125 (3.18) .500 (12.70) 1514-12050-31 1514-12050-34
.125 (3.18) .750 (19.05) 1514-12075-31 1514-12075-34
.125 (3.18) 1.000 (25.40) 1514-12100-31 1514-12100-34
.187 (4.75) .625 (15.88) 1514-18063-31 1514-18063-34
.187 (4.75) 1.000 (25.40) 1514-18100-31 1514-18100-34
.250 (6.35) .750 (19.05) 1514-25075-31 1514-25075-34
.250 (6.35) 1.000 (25.40) 1514-25100-31 1514-25100-34
.375 (9.53) 1.000 (25.40) 1514-38100-31 1514-38100-34

Note: Aluminum, brass (silver-plated) and other materials are available in sizes above. Other sizes are available upon request.

 

Mechanical & EMC Characteristics of All Mesh Strip

Shielding Effectiveness: Strip from lots are formed into gasket whose inner dimension is 12.00 x 12.00 inches (304.8 x 304.8 mm) Gasket is clamped in a test fixture with thickness deflected a minimum of 20%, EMI test is performed using MIL-STD 285 as a guide. The test is performed at frequencies from .2MHz through 10GHz. (See Table 1)

Shielding Effectiveness vs Frequency

Table 1

Shielding Effectiveness dB

Field Material Code – 31 Monel
Frequency
10kHz 100kHz 1MHz 18MHz 100MHz 400MHz 1GHz 10GHz
H 40 60 80
E 110
PW 110 110 110 100
Field Material Code – 34 Ferrous
Frequency
10kHz 100kHz 1MHz 18MHz 100MHz 400MHz 1GHz 10GHz
H 65 90 100
E 110
PW 110 110 110 100

 

Size vs Tolerance — Table 2

TOLERANCE
SHAPE SIZE RANGE DIM A DIM B
to .18 (4.57).19 – .38 (4.83 – 9.65).39 – .50 (9.91 – 12.70).51 – 1.00 (!@.95 – 25.40) +.02-0 (+.51-0)+.03-0 (+.76-0)+.046-0 (+1.17-0)+.062-0 (+1.57-0) +.02-0 (+.51-0)+.03-0 (+.76-0)+.046-0 (+1.17-0)+.062-0 (+1.57-0)
to .12 (3.05).13 to .38 (3.30 – 9.65).39 to .50 (9.91 – 12.70).51 to 1.00 (12.95 – 25.40) +.02-0 (+.51-0)+.03-0 (+.76-0)+.046-0 (+1.17-0)+.062-0 (+1.57-0)
to .18 (4.57).19 – .38 (4.83 – 9.65).39 – .50 (9.91 – 12.70).51 – 1.00 (12.95 – 25.40) +.02-0 (+.51-0)+.03-0 (+.76-0)+.046-0 (+1.17-0)+.062-0 (+1.57-0) NA+.06-03 (+1.52-.76)+ .06 (+1.52)+.09-.06 (+2.29-1.52)

 

Compression

Deflection and recovery characteristics of Knit Wire Mesh Strips are evaluated periodically in accordance with ASTM D395-61.

In order to be assured of obtaining comparable results to those shown in these curves, good design practices must be utilized.

 

 

 

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