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CIRCULAR

BACKSHELLS

EXTENSIVE RANGE OF TERMINATION

OPTIONS FOR CIRCULAR CONNECTORS

High performance sealing and strain relief

backshell solutions

AEROSPACE, DEFENSE & MARINE

/// CIRCULAR BACKSHELLS

CIRCULAR BACKSHELLS

Contents

Introduction..................................................................................................................................... 3

Selecting a Backshell.................................................................................................................... 4

Termination Styles........................................................................................................................... 5

Material & Plating Codes.............................................................................................................. 6

Modification Codes........................................................................................................................ 7

Connector Interface Table........................................................................................................... 9

POLAMCO Backshell Part Numbering System.................................................................... 10

Calculating Wire Bundle Diameter........................................................................................... 11

Product Finder.................................................................................................................................. 12

BAND

BT Series............................................................................................................................................ 14

88 Series............................................................................................................................................. 16

AP Series............................................................................................................................................ 18

DS Series...........................................................................................................

...........................

SPRING

91 Series............................................................................................................................................. 22

BRAID TAIL

70 Series............................................................................................................................................ 24

BRAID TRAP

95 Series.............................................................................................................................................26

CONE

64 Series.............................................................................................................................................28

308 Series...........................................................................................................................................

STRAIN RELIEF

77 Series............................................................................................................................................. 32

MESH TAPE

KMA Series..........................................................................................................................................

KMCC Series......................................................................................................................................36

HEAT SHRINK BOOT

76 Series............................................................................................................................................. 38

THREAD EXTENDERS & ADAPTERS

PG Series............................................................................................................................................

DC Series.............................................................................................................................................

TINEL RING

TXR Series...........................................................................................................................................

HEXASHIELD

HexaShield Series............................................................................................................................46

COBRAHEAD

Backshell modification.....................................................................................................................

BAND STRAPS

Backshell accessory..........................................................................................................................

Glossary of Terms..............................................................................................................................

AEROSPACE, DEFENSE & MARINE

/// CIRCULAR BACKSHELLS

PAGE 2

CIRCULAR BACKSHELLS

Termination Options For Circular Connectors

For high-performance sealing and strain

relief, the ideal mate for a TE Connectivity

(TE) connector or molded part in a wiring

application, is a TE backshell.

TE supplies a comprehensive range of circular POLAMCO

and Raychem backshells that can assist in providing

effective strain relief, environmental sealing and

electromagnetic interference (EMI)/radio frequency

interference (RFI) shielding, helping you meet today’s

challenges in demanding environments, across many market

sectors.

Spin-Coupling Adapters

MULTIPLE CONFIGURATIONS

• Low profile options

• Compatible with many shell sizes

and plating finishes

• Wide variety of modification

options allow customisation of

standard ranges to suit specific

requirements

Spin-coupling adapters are two-part components that have

a rotatable coupling nut and a grooved body designed to

accommodate lipped-type heat-shrinkable boots.

Spin-couplings with a compatible molded part are used

to optimize environmental protection and strain relief of

unscreened cable terminations. Cable repairs can often be

made without removing the boot.

Backshell

EASY INSTALLATION

• Tool free ranges available

• Simple and fast termination

solutions

• Two-part components allow

uncoupling for repairs to help

eliminate damage to the boot

Heat-shrinkable molded

boot (if used)

HIGH-RELIABILITY

SOLUTIONS

• Backshells can provide strain-

relief and cable support to help

prevent bending or overflexing

• Offer individual or overall 360°

screening against EMI/RFI

interference

• Backshells can offer protection

towards the effectiveness of the

cable, sealing against water and

dirt ingress

Connector

Rollback Repair Possible With A Backshell

Many cable repairs are made within 75 mm of the

connectors—usually because of a broken pin or wire. By

reheating the heat-shrinkable boot and unscrewing the

backshell coupling nut, the boot can be “rolled back,”

providing access to the rear of the connector for repair. This

technique is applicable to spin-coupling backshells utilizing

a heatshrink boot.

CIRCULAR BACKSHELLS

Selecting A Backshell

TE offers an extensive standard

range of backshell styles to suit a

wide variety of applications and

requirements. These ranges can be

extensively customized using an

array of plating options, materials

and modification codes. Use the

product finder on pages 12-13 to

select the most suitable standard

series for your requirement.

Adapter Code

An alphabetical code is used to identify connectors

with similar adapter interfaces. This code is used to

determine the backshell family and part number. The

table connector interface table on page 9 shows the

appropriate code to match a variety of interfaces.

Backshell Part Number

The part number is the sequence of numbers and

letters that describes the adapter family (or series),

size, angle, material, finish, and modifications. The

part numbering system is explained on page 10 for

POLAMCO series backshells and on the individual

Raychem product pages.

Family/Series

TE offers several families (or series) of backshell

products. Each part number begins with an numerical

or alphanumeric prefix denoting the specific product

family.

connectors are obtainable in either larger or

smaller sizes and some use letter codes.

Entry Size

Entry size is the diameter of the hole through which

the cable enters into the adapter. If unknown, the

diameter required can be calculated using the formula

shown on page 11.

Modifications

Other options (such as extended length, part

marking etc) are available and are defined by

standard modification codes - listed on pages

7-8. Alongside the standard ranges shown in this

brochure, TE also offer custom solutions to fit

more exact requirements. Contact the sales office

to find out more.

Shell Size

This is the size of a connector as specified by the

connector manufacturer. It is normally a two-digit

number between 08 and 24, although certain

Please refer to the fold out interface page (attached to the reverse cover of this brochure)

for interface specific measurements.

AEROSPACE, DEFENSE & MARINE

/// CIRCULAR BACKSHELLS

PAGE 4

CIRCULAR BACKSHELLS

Termination Styles

There are a variety of methods for terminating screening braid to backshells,

many of which are covered within TE’s standard range of backshells shown

below.

Tinel Ring

Cone

Memory ring shrunk by the application

of heat

Used on: TXR

Braid/Pigtails clamped between cones

Used on: 64/308/HexaShield Series

Band

Mesh Tape

Band clamped with calibrated tool

Used on: BT/88/AP/DS Series

Wraps mesh tape wraps around individual

screens to eliminate EMC windows

Used on: KMA Series

Braid Tail

Pre-Fabricated

Product supplied with pre-terminated braid

tail

Used on: 70 Series

Backshell with pre-installed braid tail and

heatshrink boot. Installed on cable with

heat gun.

Used on: KTKK/TAK

Spring

Braid Trap

Spring wrapped around braid

(without tooling)

Used on: 91 Series

Braid trapped in loose fitting thread

Used on: 95/77 Series

AEROSPACE, DEFENSE & MARINE

/// CIRCULAR BACKSHELLS

PAGE 5

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