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EMI Wire Mesh Gasket

MAJR’s knitted EMI wire mesh gaskets, also referred to as EMI mesh gaskets, are available in various cross sections to accommodate the many different attenuation and mounting requirements encountered in EMI-RFI shielding applications. MAJR provides the choice between our standard rectangular, round, round with fin, or double round to ensure that enclosures or other equipment will be RF sealed appropriately.

To address galvanic concerns MAJR’s shielded wire mesh gaskets are provided in a variety of material compositions allowing our customers to select the most appropriate material in their application – ensuring high attenuation over time in the systems they are installed.

Product Features:

  • High EMI/RFI Attenuation: The highest possible attenuation levels are achievable with MAJR’s 1500 EMI knitted wire mesh gaskets. Attenuation levels beyond 110 dB in the E-field and 60 dB in the H-field are common with our Wire mesh gaskets.

  • Resilient Materials: 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 EMI mesh gaskets assure long life with consistent point-to-point contact, providing high shielding effectiveness and long life.

 

Standard Products & Profiles:

 

All Mesh Rectangular Strip 

-seen below in table #1

HEIGHT

WIDTH

Monel Part Number Ferrous Part Number
(Tin-Steel)
.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

-seen below in table #2

Diameter Monel Part Number Ferrous Part Number
(Tin-Steel)
.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

-seen below in table #3

HEIGHT
Round Portion
WIDTH
Fin Portion
Monel Part Number Ferrous Part Number
(Tin-Steel)
.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

-seen below in table #4

Round
HEIGHT
Connecting
WIDTH
Monel Part Number Ferrous Part Number
(Tin-Steel)
.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 & Shielding Characteristics of EMI Wire Mesh Strips:

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 5

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 (Tin-Steel)
Frequency
10kHz 100kHz 1MHz 18MHz 100MHz 400MHz 1GHz 10GHz
H 65 90 100
E 110
PW 110 110 110 100

 

Size vs Tolerance — Table 6

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)

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EMI Wire Mesh Gaskets,

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