Backshells

Amphenol PCD Backshells offer strain relief, environmental protection, and 360° EMI/RFI shielding at the termination area of virtually any circular connector. These connectors feature a base material constructed of aluminum alloy, stainless steel, brass, or composite and a variety of finishes such as black zinc nickel, cadmium, electroless nickel, anodized black, passivated, and more. Amphenol PCD Backshells have custom designs available and meet or exceed RoHS/REACH compliance standards. Available in both military specifications and commercial types for any application, these backshells meet the Society of Automotive Engineers (SAE) AS85049 standard.

Types of Circular MIL Spec Connectors
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Results: 11 097
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Qty. RoHS Product
MIL Type
Shell Size
Shell Style
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV ST NIC
Datasheet
22In Stock
Min.: 1
Mult.: 1

Environmental Backshells MIL-DTL-5015, MIL-DTL-26482 II 16 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV ST NIC
Datasheet
1In Stock
Min.: 1
Mult.: 1

Environmental Backshells MIL-DTL-5015, MIL-DTL-26482 II 18 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 11
Datasheet
32In Stock
Min.: 1
Mult.: 1

E Nuts MIL-DTL-38999 III, IV
Amphenol PCD Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 13
Datasheet
24In Stock
Min.: 1
Mult.: 1

E Nuts MIL-DTL-38999 III, IV
Amphenol PCD Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 15
Datasheet
30In Stock
Min.: 1
Mult.: 1

E Nuts MIL-DTL-38999 III, IV
Amphenol PCD Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 21
Datasheet
13In Stock
Min.: 1
Mult.: 1

E Nuts MIL-DTL-38999 III, IV
Amphenol PCD Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI
Datasheet
13In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 10 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 12
Datasheet
16In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 12 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 12
Datasheet
13In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 12 Straight
Amphenol PCD Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI
Datasheet
3In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 14 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 16
Datasheet
3In Stock
25Expected 22/05/2026
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 16 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 16
Datasheet
1In Stock
24Expected 05/03/2026
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 I, II 16 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 11
Datasheet
23In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 11 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 13
Datasheet
29In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 13 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 17
Datasheet
5In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 17 Straight
Amphenol PCD Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI
Datasheet
16In Stock
25Expected 04/06/2026
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 17 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 19
Datasheet
9In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 19 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 19
Datasheet
21In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 19 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 19
Datasheet
24In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 19 Straight
Amphenol PCD Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI
Datasheet
21In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 19 Straight
Amphenol PCD Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI
Datasheet
4In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 21 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 21
Datasheet
12In Stock
25Expected 28/05/2026
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 21 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 21
Datasheet
22In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 21 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 21
Datasheet
19In Stock
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 21 Straight
Amphenol PCD Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23
Datasheet
10In Stock
50On Order
Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells MIL-DTL-38999 III, IV 23 Straight