Properties

dash_no

39

mounting

Front-mount; Type 1 includes an added E dimension to improve environmental sealing on smaller sizes.

ordering

Ordered by the piece; not all configurations are stock items; custom sizes available—contact for availability.

type_notes

• Type 1 gaskets use the E dimension to provide sufficient environmental sealing on smaller sizes (see drawing page 25).
• Type 2 is the standard front-mount configuration.

gasket_type

Type 2

construction

Spira‑Shield O‑Ring gasket on the outside of the frame; frame is a corrosion‑resistant stainless steel plate sealed on both sides with vulcanized silicone or fluorosilicone elastomer (plate reduces cold flow and improves durability/reusability).

dimensions_in

A 1.568 inB 1.885 inC 2.138 inD 0.150 inF 0.285 in

frame_material

Corrosion resistant stainless steel plate with elastomer on both sides.

product_family

EMI & Environmental Connector-Seal (Front-Mount) (FMECS)

shielding_quality

116 dB to 152 dB (application-dependent; varies with contact surfaces).

part_number_format

FMECS-<plating>-<dash>/<frame_elastomer>

part_number_default

FMECS-T-39/S

connector_shell_sizes

MIL-C-28840 29

plating_prefix_options

• T: Tin/lead plated gasket (90% tin / 10% lead; edges unplated) (default)
• E: Edge tin/lead plating (includes edges) for high humidity or salt-fog environments
• IW: RoHS compliant tin plating
• EIW: RoHS compliant edge tin plating for high humidity or salt-fog
• NI: Stainless steel
• TNI: Tin stainless steel
• IWNI: RoHS tin stainless steel

spiral_material_default

Spira‑Shield Standard force tin/lead plated beryllium copper gasket; electroplated 90% tin / 10% lead (edges unplated).

frame_elastomer_suffix_options

• /S: Silicone over stainless steel
• /F: Fluorosilicone over stainless steel