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MS-25171/ A-A 59178 - Electrical Terminal Boot

Silicone Rubber Terminal Boot for Electrical Connections

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C & M Rubber Co. manufactures four (4) sizes of electrical terminal boot used in products requiring a physical protective cover for electrical terminal posts. Originally designed and predominantly used in the aerospace market, these boots have proven to be a cost effective off the shelf solution for a host of electical connector applications such as marine batteries, hot tubs, gas powered residential and farm quipment, and electronic telephone switches to name just a few.

Using rubber silicone Class II, 50 Duro (Shore A) per MIL-R-5847, the termianl boot is manufactured using Liquid Injection Molding (LIM) systems. They are then batch processed in a cryogenic de-flashing system to yeild a "whistle clean" finish. Visual in-process and post process inspections are used to ensure your delivered parts meet Mil-spec AA-59178. (Superseded MS-25171 Mil-spec)

These terminal boots tolerate temperatures from -85 to 401°F and are resistant to environmental exposure. C & M Rubber manufacures these terminal boots in four standard sizes and certifies them to AA-59178-1, -2, -3, and -4 standards (detailed below). The standard color is white, however they can be specified in black and brick red. Lead-time for standard colors iin quanitites less than 20,000 pieces is typically three (3) weeks or sooner (ARO) depending upon the current in-house order cue. Custom colors are also available at a minimum upcharge and a slightly longer lead-time depending on quantity and schedule requirements. For more information on these silicone terminal boots or a custom designed electrical terminal boot made specifically for your application, contact us today. 

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MS-25171 Electrical Terminal Boot

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Multi-Cavity LIM Molding Highlights

Product Name Electrical Terminal Boot - MS-25171 & AA-59178
Product Description These Electrical Terminal Boots are used to protect and house electrical terminals.
Capabilities Applied/Processes
Multi-Cavity Liquid Injection Molding
Cryogenic De-Flashing
Equipment Used to Manufacture Part 22 ton BOY LIM unit
Overall Part Dimensions

F - Diameter: 0.16"
Nearest AWG Gauge: 6
Conductor Diameter: 0.1620"
Turns of Wire per Inch: 6.17
Copper Resistance: 1.296 Omega/km

F - Diameter: 0.31"
Nearest AWG Gauge: 1
Conductor Diameter: 0.2893"
Turns of Wire per Inch: 3.46
Copper Resistance: 0.4066 Omega/km

F - Diameter: 0.43"
Nearest AWG Gauge: 000
Conductor Diameter: 0.4096"
Turns of Wire per Inch: 2.44
Copper Resistance: 0.2028 Omega/km

F - Diameter: 0.56"
Nearest AWG Gauge: 0000
Conductor Diameter: 0.4600"
Turns of Wire per Inch: 2.17
Copper Resistance: 0.1608 Omega/km

Tightest Tolerances Certified to new AA-59178 and outdated MS-25171 Spec
Material Used Rubber Silicone Class II, 50 Duro (Shore A) per MIL-R-5847
Material Finish Standard Colors                                                   Optional Colors (additonal cost)
In process testing/inspection performed Visual in process
Post Process Inspection
Features Withstand temps from -85 to 401°F
Resistant to deterioration by weathering
Industry for Use Electrical
Volume Millions
Delivery/Turnaround Time Stock & Manufactured To Order - 3 days to 30 days ARO based upon in-house order cue. 
Delivery Location Worldwide
Standards Met Customer Specifications, 2D CAD Drawing
A-A-59178 Commercial Item Description (CID)

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