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High-performance protective caps for demanding environments

Protective caps for circular connectors

Protective caps are essential accessories for safeguarding the exposed interfaces of electrical connectors—such as plugs and receptacles—from a wide range of environmental hazards, including dust, moisture, chemicals, and physical impacts. By covering and sealing connector contact points when not in use, protective caps help prevent contamination, corrosion, and damage, extending the service life of the connector and maintaining optimal performance.

At EMCA, we supply a comprehensive selection of high-quality protective caps engineered for circular connectors used in demanding applications. Our connector caps are purpose-designed to shield against dust ingress, water penetration, and mechanical wear, providing dependable protection in harsh operating environments. We offer protective caps for both plugs and receptacles, ensuring complete coverage for your interconnect systems.

Our stock includes protective caps compatible with major connector series. For example, our Series C1 protective caps are designed for MIL-DTL-26482 Series I and II connectors, while our Series C3 protective caps provide a perfect fit for MIL-DTL-38999 Series III connectors. Each protective cap is available in a choice of robust body materials—such as aluminium, stainless steel, or marine bronze—and many options are offered with specialist plating finishes to enhance resistance to corrosion and extreme environmental conditions.

Whether you require protective caps for aerospace, defence, marine, industrial, or transportation applications, EMCA delivers durable solutions you can trust.

Connector backshells - straight and 90 degree
Straight backshells
MIL backshells

Key features of our connector protective caps:

  • Effective sealing to protect connectors from environmental contaminants such as dust, moisture, chemicals, and debris.
  • Robust construction using high-quality materials to withstand the mechanical stresses of industrial, transportation, and aerospace applications.
  • Optional lanyards or tethers to ensure the protective cap remains securely attached and easily accessible when the connector is in use.
  • Wide range of sizes and configurations to achieve a precise fit for different circular connector series and interface types.

Explore our comprehensive range of protective caps

  • Series C1

    Series C1

    To suit Connectors:

    • VG95328
    • MS3110; MS3111; MS3116
    • MS3470; MS3471; MS3474; MS3475; MS3476
    • PAN 6432-1/ -4 A; B; F
    • 6020; 6026; 6027
    • Aero-Electric Connectors: AE77
    • Amphenol: PT; PT-SE; 62GB; 162GB; PTS-DR; 602GB
    • Deutsch: 951-50; AFD; RR
    • ITT-Cannon: KPT; KPSE; PVX; PV7
    • Souriau: 851; 8525; 8526; UT0

    Connector Specification:

    • VG95328
    • MIL-DTL-26482 Series I & II
    • MIL-DTL-83723 Series I
    • BS9522-F0017
    • NFC 93422- HE 301 B
    • PAN 6432-1/ -4
    • EL2112 Pattern 602
  • Series C2

    Series C2

    To suit Connectors:

    • Amphenol: 97B; GT Bayonet
    • Glenair: ITS
    • ITT Cannon: VG; CA-Bayonet

    Connector Specification:

    • VG95234
    • MIL-DTL-5015 (reverse bayonet)
  • Series C3

    Series C3

    To suit Connectors:

    • VG95319-1006; -1007; -1008
    • JN1034-A; -B; -C
    • D38999/20; /24; /26
    • BS-C6170; BS-C6176; BS-C6177
    • CECC75-201-002-A; -B; -C
    • EN3645-003; -008; -009
    • Aero-Electric Connectors: AE3
    • Amphenol: TV
    • Deutsch: DTS
    • ITT Cannon: KJA
    • Souriau: 8D

    Connector Specification:

    • VG95319-100x
    • JN1034
    • MIL-DTL-38999 Series III
    • BS9520-G0003
    • CECC75-201-002
    • EN3645-001
  • Series C4

    Series C4

    To suit Connectors:

    • MS27466; MS27656; MS27467; MS27468
    • BS-C6160; BS-C6163; BS-C6166; BS-C6167; BS-C6165
    • HE308-00T; HE308-06T; HE308-07T
    • Aero-Electric Connectors: AE1
    • Amphenol: LJT
    • Deutsch: DJT
    • ITT Cannon: KJL
    • Souriau: 8LT

    Connector Specification:

    • MIL-DTL-38999 Series I
    • BS9520-G0001
    • NFC 93422-HE308
  • Series C5

    Series C5

    To suit Connectors:

    • VG96912-A; -B; -D; -E
    • PAN6433-2; -A; -B; -F; -FG
    • JN1003 -A; -B; -FG
    • LN29729-A; -B; -F; -N
    • Amphenol: SJT
    • Deutsch: HDJ
    • ITT Cannon: CGK
    • Souriau: 8ST

    Connector Specification:

    • VG96912
    • PAN 6433-2
    • JN1003
    • LN29729
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