How To Select the Proper Backshell

The key to successful backshell selection is proper product application. To do this, a complete description of the backshell's intended use is required. The more complex the application is, the more detailed the questions become. The following are basic application requirements:

• Connector type; part number
• Cable or wire bundle diameter, including detailed description of cable make-up
• Intended environment; shipboard, space, airframe, ground support, etc.
• Restrictions; size, shape, weight, etc.
• Performance required; strain-relief, water-tight, moisture-resistant, shield termination, working room, repairable, potted or molded, light, medium or heavy duty product performance per MIL-C-85049 or a MS product required

Shield terminating backshells require detailed cable construction description, and application definition. There is no panacea to shield terminations, or any one method that meets a majority of requirements. Band-it bands are the most universal termination method. However, bands require special tools to install. Backshell manufacturers have several designs to meet each requirement. The following are the basic or common designs:

• Multiple conical rings
• Single conical ring, internal chamfer seat
• Castellated or splined ring
• Lampbase thread ring
• Crimp ring
• Radial compression spring
• Magformed or crimp ring with shield sock and shrink boot
• Band-it Bands

All of the basic shield ring designs have specific uses and are manufactured by Glenair, Inc. The one you select depends on many factors. Costs, repairability, shield type, shield effectiveness, shield termination method, shield construction, shield combinations, cable type, cable jacket thickness, cable diameter tolerance, product performance, weight, working room, temperature, shock, vibration, strain-relief, dissimilar metals, corrosion, etc. The primary factor is cable construction--what type of shield is being terminated, where is the shield or combination of shields located within the cable or wire bundle, and type of outer jacket construction are key factors. Customer preference, established methods and practices, tradition, manual skill level and inspection must also be considered.

Connector Backshells and Accessories > How to Select the Proper Backshell

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Diagrams on this page...

Standard Shield Termination Design

• Multiple Conical Rings
• Single Conical Rings
• Crimp Ring and Banding Terminations
• Special Application

Basic Backshell Configurations

• Strain-Relief Clamps Used on Backshells
• Strain-Relief Clamps Used on Connectors

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Standard Shield Termination Design

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Multiple Conical Rings

	380-001 Dual Ring, C-Bore Heavy Duty MIL-C-85049/23,/24,/25 Overall Shield
	380-086 Dual Ring, C-Bore Heavy Duty Individual and/or Overall Shield
	380-018 Triple Ring, C-Bore Medium Duty Individual and/or Overall Shield
	380-071 Internal Ring Heavy Duty MIL-DTL-28840/6 Individual and/or Overall Shield

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Single Conical Rings

	380-013 Single Ring General Duty Individual or Overall Shields
	380-007 Single Cone Ring Medium Duty MIL-C-85049/17,/19,/36 Overall Shield

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Crimp Ring and Banding Terminations

	440-032 Crimp Ring Medium Duty M85049/26 Overall Shield
	319-001 Medium Duty Overall Shield
	440-030 Medium Duty M85049/82 - M85049/90 Overall Shield

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Special Application

	311-001 General Duty Overall Shield
	460-001 General Duty Overall Shield
	470-005 General Duty Individual and Overall Shield
	400-001 Light Duty Individual Shield

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Basic Backshell Configurations

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Strain Relief Clamps Used on Backshells

MIL-C-85049/41 MS3057A Clamp			Proprietary Light-Weight Clamp
MIL-C-85049/42 MS3057D Clamp			Proprietary G61911 Clamp

Proprietary Cable Grip

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Strain Relief Clamps Used on Connectors

MS3417, MS27506, M83723/15S, M85049/38, /49, /52			MS3418, MS27507, M83723/15R, M85049/39, /47, /51
M85049/53, /56 Cable Tie Backshell			M85049/55, /63 Cable Tie