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Mil-Spec Backshells and Connector Accessories

Mil-Spec backshells and connector accessories are specialized components that are designed to provide mechanical and electrical protection for electrical connectors used in military and aerospace applications. These components are built to meet specific standards set by the United States Department of Defense, known as MIL-SPEC, which govern the design and manufacturing of military-grade equipment.

Backshells are used to provide strain relief and environmental protection for electrical connectors. They are typically made of metal or plastic and are designed to fit over the back of the connector, providing a secure attachment point for the cable or wiring. Backshells can also be used to shield the connector from electromagnetic interference and provide protection against dust, moisture, and other environmental hazards.

Connector accessories are used to enhance the functionality and performance of electrical connectors. They include items such as adapter plates, connector covers, and dust caps, which are used to protect connectors when they are not in use. Connector accessories can also be used to provide a secure connection between different types of connectors or to increase the current-carrying capacity of the connector.

Mil-Spec backshells and connector accessories are designed to meet the rigorous requirements of military and aerospace applications. They are built to withstand harsh environmental conditions, including extreme temperatures, shock, vibration, and exposure to chemicals and moisture. These components are also designed to provide a high level of electrical performance, including low resistance, high insulation, and high reliability.

Mil-Spec Backshells and Connector Accessories

Available Parts 939

Part# Info Specs
Part RoHS Manufacturer Description Additional Features Alternate Contact Functions Alternate Contact Sources Alternate Contacts Approvals (V) Assembly Item Name Associated Backshell Military - Specifications Associated Military - Specifications Backshell Clamping Maximum Cable Entry Minimum Cable Entry Cable Types Connector Accessory Type Contact Design Contact Gender Contact Style Contact Type Cross Section Area DIN Conformity Design Finish Thickness IEC Conformity Insertion Tool Sources Insertion Tools MIL Conformity Manufacturer Series Material Mating Contacts MIL-Connector Accessory MIL-Connector Accessory Name Mounting Option-1 Mounting Option-2 Mounting Style National Stock Number (NSN) Maximum Operating Temperature Minimum Operating Temperature Rated Current Rated Voltage Rated DC Voltage Removal Tool Sources Removal Tools Shell Sizes Shielding Terminal Type Tool Settings Usage Wire Gauge (AWG) Maximum Wire Size Minimum Wire Size
226-1018-000 by ITT Cannon

226-1018-000

ITT Cannon

CONNECTOR ACCESSORY;

CONNECTOR ACCESSORY

390FA057MT1610TA by Glenair

390FA057MT1610TA

Glenair

390FA057MT1610TA by Glenair is a Mil-Spec backshell with shell size 16, MIL-DTL-38999 Series I & II compatibility. Made of aluminum alloy, it operates b/w -65°C to 175°C. Ideal for military connectors requiring high-temp resistance and rugged construction.

MIL-DTL-38999 SERIES I, MIL-DTL-38999 SERIES II

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

16

10-597878-011 by Amphenol

10-597878-011

Amphenol

CONNECTOR ACCESSORY; DIN Conformity: NO; Terminal Type: SOLDER; MIL Conformity: YES; MIL-Connector Accessory Name: CONTACT; Contact Gender: FEMALE;

MIL-DTL-38999

CONNECTOR ACCESSORY

FEMALE

NO

NO

YES

CONTACT

SOLDER

97-3057-1007-1(621) by Amphenol

97-3057-1007-1(621)

Amphenol

CONNECTOR ACCESSORY; MIL Conformity: YES; MIL-Connector Accessory Name: CLAMPING ITEM; DIN Conformity: NO; Shell Sizes: 12SL; 14; 14S; IEC Conformity: NO;

CONNECTOR ACCESSORY

NO

NO

YES

CLAMPING ITEM

12SL; 14; 14S

LP-597820-355 by Amphenol

LP-597820-355

Amphenol

Amphenol LP-597820-355 is a Mil-Spec backshell with CRIMP contact and terminal types. Compliant with MIL-C-26482, it uses FEMALE copper alloy contacts like M39029/32-259 for mating with 10-314980-20P connectors. Ideal for military applications requiring reliable crimp connections in harsh environments.

M39029/32-259

MIL-C-26482

CONNECTOR ACCESSORY

FEMALE

CRIMP

NO

NO

YES

COPPER ALLOY

10-314980-20P

CONTACT

CRIMP

G-08-P1 by TE Connectivity

G-08-P1

TE Connectivity

TE Connectivity's G-08-P1 is a Mil-Spec backshell with 50 finish thickness. It supports wire gauge from 28 to 22 AWG, rated for 5A current. Ideal for signal design applications with male contact gender and copper alloy material.

CONNECTOR ACCESSORY

MALE

.4 mm2

NO

SIGNAL

50

NO

91067-1

YES

COPPER ALLOY

CONTACT

125 Cel

-55 Cel

5 A

CRIMP

M22520/2-01

22

22 AWG

28 AWG

STXR40AB00-1008BI by TE Connectivity

STXR40AB00-1008BI

TE Connectivity

TE Connectivity's STXR40AB00-1008BI backshell, MIL-DTL-38999 compatible, features shell size 11; B with 0.25" min and 0.4" max cable entry. Made of aluminum alloy, it operates b/w -65°C to 175°C. Ideal for military applications requiring reliable connector accessories.

MIL-DTL-38999 SERIES III, IV

.4 inch

.25 inch

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

11; B

STXR40AB00-1616BI by TE Connectivity

STXR40AB00-1616BI

TE Connectivity

TE Connectivity's STXR40AB00-1616BI is a Mil-Spec Backshell and Connector Accessory with shell sizes 17; E. It conforms to MIL-DTL-38999 SERIES III, IV and has a min cable entry of 0.5 inch and max operating temperature of 175°C. Its aluminum alloy material makes it suitable for military applications.

MIL-DTL-38999 SERIES III, IV

.8 inch

.5 inch

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

17; E

STXR40AB90-2020BI by TE Connectivity

STXR40AB90-2020BI

TE Connectivity

TE Connectivity's STXR40AB90-2020BI backshell is MIL-DTL-38999 III, IV compliant with shell size 21; G. Made of aluminum alloy, it operates b/w -65°C to 175°C. Ideal for military connectors, it ensures reliable performance in extreme conditions.

MIL-DTL-38999 SERIES III, IV

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINIUM ALLOY

BACKSHELL

175 Cel

-65 Cel

21; G

TXR40AZ00-0804AI by TE Connectivity

TXR40AZ00-0804AI

TE Connectivity

TE Connectivity's TXR40AZ00-0804AI backshell fits MIL-DTL-38999 Series III, IV connectors with shell sizes 9; A. Made of aluminum alloy, it supports cable entries from 0.125" to 0.2", operating b/w -65°C to 175°C. Ideal for military applications requiring MIL conformity and reliable cable management.

MIL-DTL-38999 SERIES III, IV

.2 inch

.125 inch

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

9; A

TXR41AC00-1407AI by TE Connectivity

TXR41AC00-1407AI

TE Connectivity

TXR41AC00-1407AI by TE Connectivity is a Mil-Spec Backshell and Connector Accessory with shell size 15; D. It has MIL-DTL-38999 SERIES I, II conformity and can withstand temperatures from -65 to 200 °C. Made of aluminum alloy, it provides cable entry ranging from 0.219 to 0.35 inch.

MIL-DTL-38999 SERIES I, II

.35 inch

.219 inch

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

200 Cel

-65 Cel

15; D

TXR41AC00-1408AI by TE Connectivity

TXR41AC00-1408AI

TE Connectivity

TE Connectivity's TXR41AC00-1408AI backshell fits MIL-DTL-38999 Series I, II connectors with shell size 15; D. Made of aluminum alloy, it supports cable entries from 0.25" to 0.4". Operating b/w -65°C to 200°C, it ensures MIL conformity for military applications.

MIL-DTL-38999 SERIES I, II

.4 inch

.25 inch

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

200 Cel

-65 Cel

15; D

M38999/913B by Spacecraft Components

M38999/913B

Spacecraft Components

CONNECTOR ACCESSORY; Shell Sizes: 13; MIL Conformity: YES; IEC Conformity: NO; DIN Conformity: NO; MIL-Connector Accessory Name: DUMMY ITEM;

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM

DUMMY ITEM

13

M38999/919B by Spacecraft Components

M38999/919B

Spacecraft Components

CONNECTOR ACCESSORY; MIL Conformity: YES; IEC Conformity: NO; Shell Sizes: 19; Associated Military - Specifications: MIL-DTL-38999; DIN Conformity: NO;

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM

DUMMY ITEM

19

JE13 by Amphenol

JE13

Amphenol

CONNECTOR ACCESSORY; MIL-Connector Accessory Name: GASKET; IEC Conformity: NO; Associated Military - Specifications: MIL-DTL-38999; DIN Conformity: NO; MIL Conformity: YES;

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

GASKET

G70517NF by Glenair

G70517NF

Glenair

CONNECTOR ACCESSORY; MIL Conformity: YES; IEC Conformity: NO; MIL-Connector Accessory Name: SPACER ITEM; DIN Conformity: NO; Material: ALUMINUM ALLOY;

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

SPACER ITEM

CNP058360 by Amphenol

CNP058360

Amphenol

Amphenol's CNP058360 is a MIL-Spec backshell with CRIMP terminals, conforming to MIL standards. It features M39029/58-360 alternate contacts and CNS057354 mating contacts for MALE gender. Ideal for military applications requiring reliable connector accessories.

M39029/58-360

CONNECTOR ACCESSORY

MALE

NO

NO

YES

CNS057354

CONTACT

CRIMP

TX40AC00-1005 by TE Connectivity

TX40AC00-1005

TE Connectivity

TE Connectivity's TX40AC00-1005 backshell is MIL-DTL-38999 III, IV compliant with shell size 11; B. Made of aluminum alloy, it operates b/w -65°C to 200°C. Ideal for military connectors, this accessory ensures secure connections in harsh environments.

MIL-DTL-38999 SERIES III, IV

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

200 Cel

-65 Cel

11; B

GS85049/69-11M by Glenair

GS85049/69-11M

Glenair

CONNECTOR ACCESSORY; DIN Conformity: NO; IEC Conformity: NO; MIL-Connector Accessory Name: BOOT ADAPTER; Shell Sizes: 11; MIL Conformity: YES;

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BOOT ADAPTER

11

10-407552-505 by Amphenol

10-407552-505

Amphenol

CONNECTOR ACCESSORY; MIL-Connector Accessory Name: CONTACT; MIL Conformity: YES; Terminal Type: SOLDER; Contact Gender: MALE; IEC Conformity: NO;

CONNECTOR ACCESSORY

MALE

NO

NO

YES

CONTACT

SOLDER

DD121073-153 by ITT Cannon

DD121073-153

ITT Cannon

CONNECTOR ACCESSORY; IEC Conformity: NO; Shell Sizes: DD; Associated Backshell Military - Specifications: MIL-DTL-24308; MIL-Connector Accessory Name: BACKSHELL; Material: THERMOPLASTIC;

MIL-DTL-24308

CONNECTOR ACCESSORY

NO

NO

YES

THERMOPLASTIC

BACKSHELL

DD

10-350349-143 by Amphenol

10-350349-143

Amphenol

CONNECTOR ACCESSORY; DIN Conformity: NO; IEC Conformity: NO; Shell Sizes: 14; MIL Conformity: YES; Associated Military - Specifications: MIL-C-22992;

MIL-C-22992

CONNECTOR ACCESSORY

NO

NO

YES

CLAMPING ITEM

14

507-003NF02T by Glenair

507-003NF02T

Glenair

Military Connector Accessories;

809-198ZNU12U6-02A by Glenair

809-198ZNU12U6-02A

Glenair

809-198ZNU12U6-02A by Glenair is a Mil-Spec backshell with shell size 12, MIL-DTL-38999 compliant. Made of aluminum alloy, it operates b/w -65°C to 175°C. Ideal for military connectors, its accessory name is COVER ITEM.

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINIUM ALLOY

COVER ITEM

175 Cel

-65 Cel

12

660-023M25S5-05 by Glenair

660-023M25S5-05

Glenair

Glenair's 660-023M25S5-05 is a Mil-Spec backshell with shell size 25, MIL-C-38999 compliant. Made of aluminum, it can operate b/w -65°C to 200°C. Ideal for military connectors, specifically as a cover item accessory.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

25

660-023M25H5-05 by Glenair

660-023M25H5-05

Glenair

Glenair's 660-023M25H5-05 is a Mil-Spec backshell with shell size 25, MIL-C-38999 compliant. Made of aluminum, it can operate b/w -65°C to 200°C. Ideal for military connectors, specifically as a cover item accessory.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

25

660-023M23S5-05 by Glenair

660-023M23S5-05

Glenair

Glenair's 660-023M23S5-05 is a Mil-Spec backshell with shell size 23, MIL-C-38999 conformity, and aluminum material. It can operate b/w -65°C to 200°C, ideal for military connectors like COVER ITEM in harsh environments.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

23

660-023M21S5-05 by Glenair

660-023M21S5-05

Glenair

Glenair's 660-023M21S5-05 is a Mil-Spec backshell with shell size 21, MIL-C-38999 conformity, and aluminum material. It operates b/w -65°C to 200°C, ideal for military connectors like COVER ITEM in harsh environments.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

21

660-023M23F5-05 by Glenair

660-023M23F5-05

Glenair

Glenair's 660-023M23F5-05 is a Mil-Spec backshell with Shell Size 23, MIL-C-38999 conformity, and Aluminum material. It operates b/w -65°C to 200°C, ideal for military connectors like COVER ITEM in harsh environments.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

23

660-023NF19H5-64 by Glenair

660-023NF19H5-64

Glenair

Glenair's 660-023NF19H5-64 is a Mil-Spec backshell with shell size 19, MIL-C-38999 conformity, and aluminum material. It operates b/w -65°C to 175°C, making it ideal for military connector accessories like COVER ITEM.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

175 Cel

-65 Cel

19

660-023M21F5-05 by Glenair

660-023M21F5-05

Glenair

Glenair's 660-023M21F5-05 is a Mil-Spec backshell with shell size 21, MIL-C-38999 conformity, and aluminum material. It can operate in temperatures ranging from -65°C to 200°C. Ideal for military applications requiring durable connector accessories.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

200 Cel

-65 Cel

21

660-023MT15S5-15 by Glenair

660-023MT15S5-15

Glenair

Glenair's 660-023MT15S5-15 is a Mil-Spec backshell with shell size 15, MIL-C-38999 conformity, and aluminum material. It operates b/w -65°C to 175°C, ideal for military connectors like COVER ITEM in harsh environments.

MIL-C-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM

COVER ITEM

175 Cel

-65 Cel

15

620MA065M13 by Glenair

620MA065M13

Glenair

Glenair's 620MA065M13 is a Mil-Spec backshell with shell size 13, MIL-DTL-38999 conformity, and aluminum material. It can operate b/w -65°C to 200°C, ideal for military applications requiring robust connector accessories like clamping items.

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM

CLAMPING ITEM

200 Cel

-65 Cel

13

620MS065NF16 by Glenair

620MS065NF16

Glenair

620MS065NF16 by Glenair is a Mil-Spec backshell with shell size 16, MIL-DTL-38999 conformity, and aluminum material. It can operate in temperatures ranging from -65°C to 175°C. Ideal for military applications requiring durable connector accessories.

MIL-DTL-38999

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM

CLAMPING ITEM

175 Cel

-65 Cel

16

97-3057-12(621) by Amphenol

97-3057-12(621)

Amphenol

CONNECTOR ACCESSORY; MIL-Connector Accessory Name: CABLE CLAMP; Material: ZINC ALLOY; MIL Conformity: YES; Shell Sizes: 20; 22; DIN Conformity: NO;

CONNECTOR ACCESSORY

NO

NO

YES

ZINC ALLOY

CABLE CLAMP

20; 22

TJT701007 by Amphenol

TJT701007

Amphenol

The Amphenol TJT701007 is a MIL-Spec backshell with MIL-T-81714 conformity. Made of aluminum alloy, it has a wide operating temperature range from -65°C to 200°C. Ideal for military applications requiring durable mounting items in extreme environments.

MIL-T-81714

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

MOUNTING ITEM

200 Cel

-65 Cel

TJT400100 by Amphenol

TJT400100

Amphenol

The Amphenol TJT400100 is a MIL-Spec backshell with MIL-T-81714 conformity. Made of aluminum alloy, it has a wide temperature range from -65°C to 200°C. Ideal for military applications requiring durable mounting items in extreme environments.

MIL-T-81714

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

MOUNTING ITEM

200 Cel

-65 Cel

TJT701010 by Amphenol

TJT701010

Amphenol

The Amphenol TJT701010 is a MIL-Spec backshell with MIL-T-81714 conformity. Made of aluminum alloy, it has a max operating temp of 200°C and min of -65°C. Ideal for military connectors, it serves as a mounting item in harsh environments.

MIL-T-81714

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

MOUNTING ITEM

200 Cel

-65 Cel

M85049/139-24L by Glenair

M85049/139-24L

Glenair

CONNECTOR ACCESSORY; Material: FLUOROSILICONE; MIL Conformity: YES; MIL-Connector Accessory Name: BUSHING; Maximum Operating Temperature: 200 Cel; DIN Conformity: NO;

CONNECTOR ACCESSORY

NO

NO

YES

FLUOROSILICONE

BUSHING

200 Cel

-70 Cel

M85049/139-10L by Glenair

M85049/139-10L

Glenair

CONNECTOR ACCESSORY; Minimum Operating Temperature: -70 Cel; Maximum Operating Temperature: 200 Cel; MIL-Connector Accessory Name: BUSHING; Material: FLUOROSILICONE; IEC Conformity: NO;

CONNECTOR ACCESSORY

NO

NO

YES

FLUOROSILICONE

BUSHING

200 Cel

-70 Cel

M85049/139-24D by Glenair

M85049/139-24D

Glenair

CONNECTOR ACCESSORY; MIL Conformity: YES; Material: SILICONE; MIL-Connector Accessory Name: BUSHING; DIN Conformity: NO; IEC Conformity: NO;

CONNECTOR ACCESSORY

NO

NO

YES

SILICONE

BUSHING

200 Cel

-70 Cel

MS3417-8C by Glenair

MS3417-8C

Glenair

CONNECTOR ACCESSORY; IEC Conformity: NO; Shell Sizes: 8; Associated Military - Specifications: MIL-DTL-26482, MIL-DTL-83723; DIN Conformity: NO; MIL Conformity: YES;

MIL-DTL-26482, MIL-DTL-83723

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

STRAIN RELIEF

8

557-245M1 by Glenair

557-245M1

Glenair

Glenair 557-245M1 is a MIL-Spec BACKSHELL made of ALUMINUM ALLOY. It conforms to MIL-C-24308, with a temp range of -65°C to 200°C. Ideal for military connectors and accessories due to its rugged design and wide operating temperature range.

MIL-C-24308

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

200 Cel

-65 Cel

1

10-597503-065 by Amphenol

10-597503-065

Amphenol

CONNECTOR ACCESSORY; IEC Conformity: NO; Contact Gender: FEMALE; MIL Conformity: YES; Terminal Type: CRIMP; MIL-Connector Accessory Name: CONTACT;

CONNECTOR ACCESSORY

FEMALE

NO

NO

YES

CONTACT

CRIMP

MC8022D/AA-14 by Positronic Industries

MC8022D/AA-14

Positronic Industries

CONNECTOR ACCESSORY;

CONNECTOR ACCESSORY

340HS001NF19-6N by Glenair

340HS001NF19-6N

Glenair

340HS001NF19-6N by Glenair is a MIL-Spec backshell with shell size 19, aluminum alloy material, and MIL-DTL-38999 compatibility. It operates b/w -65°C to 175°C, making it suitable for military connectors in extreme temperature environments.

MIL-DTL-38999

CIRCULAR CONN ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

19

500S010A37B09S by Glenair

500S010A37B09S

Glenair

Glenair's 500S010A37B09S backshell, MIL-DTL-83513 compliant, features aluminum alloy construction. With shell size F, it operates b/w -65°C to 175°C. Ideal for military connectors, it ensures secure and reliable connections in extreme conditions.

MIL-DTL-83513

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

175 Cel

-65 Cel

F

500T010M51B08 by Glenair

500T010M51B08

Glenair

The Glenair 500T010M51B08 backshell is MIL-DTL-83513 compliant, made of aluminum alloy, and supports operating temperatures from -65 to 200°C. Ideal for military connectors, it comes in shell size G for rugged applications requiring reliable performance.

MIL-DTL-83513

CONNECTOR ACCESSORY

NO

NO

YES

ALUMINUM ALLOY

BACKSHELL

200 Cel

-65 Cel

G