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Amphenol® Tri-Start MIL-DTL-38999 Series III Connectors offer the highest performance capabilities for both general duty and severe environment applications. Meeting or exceeding MIL-DTL-38999 Series III requirements, Amphenol's Tri-Start connector is available in aluminum, stainless steel or composite with several finish options.
Amphenol Tri-Start MIL-DTL-38999 Series III connectors are an industry-standard circular connector for commercial and military applications and are among the most widely-used MIL-SPEC connectors throughout the military and aerospace industries. These high-density military and aerospace connectors are designed to the highest performance specifications and meet or exceed MIL-DTL-38999 Series III requirements. Amphenol's Tri-Start D38999 connector is offered in aluminum, stainless steel or composite with several finish options.
Available in a variety of configurations with up to 128 contacts, Tri-Start MIL-DTL-38999 Series III TV connectors provide a ruggedized interconnect solution for both general duty and harsh environments. D38999 Series III features advanced EMI shielding and electrostatic discharge protection (ESD) for stunting high voltage, high current events, high temperature vibration resistance, an improved interfacial seal design for moisture resistance, and is available with an optional 1 X 10-7 cm3 hermetic seal.
Consult Amphenol Aerospace about Boeing BACC63, Airbus EN3645, and other industry specification order information.
Product Options
Cadmium over nickel, electroless nickel, stainless steel, black zinc nickel, and more finishes available.
Endbells, cable clamps, dust caps, and sealing plugs for enhanced functionality and protection.
Technical Specifications
Electrical Data:
Mechanical Data:
Environmental Data:
Vibration & Shock Testing:
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
*All dimensions for reference only. For availability of other arrangements, consult Amphenol Aerospace.
Amphenol® Tri-Start connectors provide EMI/EMP shielding capability which exceeds MIL-DTL-38999 Series III requirements.
The TV and CTV Series III connector with standard solid metal-to-metal coupling, EMI grounding fingers and conductive finishes have proven to be the ultimate in EMI/EMP shielding effectiveness. The charts illustrate shielding effectiveness data which is typical of Tri-Start connectors tested with the nickel finish (Class F-metal, Class M-composite) over a wide frequency range.
The vibration capability of the Tri-Start Series is shown in the chart below. This illustrates the most severe vibration envelope of any qualified connector available today.
These capabilities along with a +200°C, -65°C temperature rating and superior moisture sealing protection provide the user with a connector that can withstand the most rigorous application.
Tri-Start, Series III Typical Shielding Effectiveness Test Data
EMI/EMP Shielding Effectiveness dB Testing
Triaxial Method
Stirring Method
Test data beyond 2GHz is subject to equipment variation.
Tri-Start Vibration Criteria
* Dependant on shell finish
Depending on the shell style, shell size and contact count, weight savings can range from 17% to 40% compared to standard aluminum product.
Tri-Start Weight in Ounces (includes contacts)
Wall Mount Receptacle (00) + Military D38999/20 | Jam Nut Receptacle (07) + Military D38999/24 | Plug (06) + Military D38999/26 | ||||||||||||||||
Stainless Steel | Aluminum | Composite | Stainless Steel | Aluminum | Composite | Stainless Steel | Aluminum | Composite | ||||||||||
Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | Pin | Socket | |
9-35 | 0.7216 | 0.784 | 0.3248 | 0.3777 | 0.2588 | 0.3121 | 1.1472 | 1.2096 | 0.4416 | 0.504 | 0.3489 | 0.4413 | 1.0736 | 1.136 | 0.4236 | 0.4625 | 0.2606 | 0.2994 |
9-98 | 0.7216 | 0.7776 | 0.2496 | 0.3056 | 0.1664 | 0.2224 | 1.1472 | 1.2032 | 0.4416 | 0.4976 | 0.3744 | 0.464 | 1.0736 | 1.1296 | 0.3968 | 0.4624 | 0.2991 | 0.2337 |
11-35 | 0.9488 | 1.08 | 0.3632 | 0.496 | 0.2753 | 0.4081 | 1.4304 | 1.5632 | 0.5936 | 0.7264 | 0.4679 | 0.6007 | 1.248 | 1.3808 | 0.5312 | 0.6389 | 0.345 | 0.4582 |
11-98 | 0.9488 | 1.062 | 0.3632 | 0.4768 | 0.2753 | 0.3889 | 1.4304 | 1.544 | 0.5936 | 0.7072 | 0.4679 | 0.5815 | 1.248 | 1.3616 | 0.533 | 0.6283 | 0.3468 | 0.4457 |
13-8 | 1.2096 | 1.3888 | 0.48 | 0.6592 | 0.3696 | 0.5488 | 1.9104 | 2.0896 | 0.7664 | 0.9456 | 0.656 | 0.8352 | 1.8048 | 1.984 | 0.7936 | 0.9728 | 0.5237 | 0.5952 |
13-35 | 1.216 | 1.432 | 0.4864 | 0.7024 | 0.3762 | 0.5922 | 1.9168 | 2.1328 | 0.7728 | 0.9888 | 0.6136 | 0.8296 | 1.8112 | 2.0272 | 0.8 | 0.8472 | 0.5301 | 0.6531 |
13-98 | 1.216 | 1.4016 | 0.4864 | 0.672 | 0.3762 | 0.5618 | 1.9168 | 2.1024 | 0.7728 | 0.9584 | 0.6136 | 0.7992 | 1.8112 | 1.9968 | 0.7978 | 0.9856 | 0.5244 | 0.7157 |
15-5 | 1.5312 | 1.7904 | 0.6352 | 0.8944 | 0.5027 | 0.7619 | 2.3792 | 2.6384 | 0.9728 | 1.232 | 0.7749 | 1.0341 | 2.2704 | 2.5456 | 0.9632 | 1.1719 | 0.645 | 0.8467 |
15-18 | 1.5456 | 1.8416 | 0.776 | 0.9456 | 0.6432 | 0.8128 | 2.3936 | 2.6896 | 0.9872 | 1.2832 | 0.8544 | 1.1504 | 2.2848 | 2.5808 | 0.9776 | 1.2736 | 0.6594 | 0.8208 |
15-35 | 1.5424 | 1.8768 | 0.6464 | 0.9808 | 0.5139 | 0.8483 | 2.3904 | 2.7344 | 0.984 | 1.328 | 0.7861 | 1.1301 | 2.2816 | 2.6256 | 1.2179 | 1.3184 | 0.8961 | 1.0002 |
17-6 | 2.1488 | 2.5904 | 0.936 | 1.3776 | 0.7812 | 1.2228 | 2.9152 | 3.3568 | 1.2336 | 1.6752 | 0.994 | 1.4356 | 2.5008 | 3.1024 | 1.1408 | 1.7424 | 0.816 | 1.4176 |
17-26 | 2.1344 | 2.56 | 0.9216 | 1.3472 | 0.7668 | 1.1924 | 2.9008 | 3.3264 | 1.2192 | 1.6448 | 0.9796 | 1.4052 | 2.4864 | 2.912 | 1.1264 | 1.3343 | 0.8017 | 0.8062 |
17-35 | 2.136 | 2.664 | 0.9232 | 1.4512 | 0.7684 | 1.2964 | 2.9024 | 3.4304 | 1.2208 | 1.7488 | 0.9812 | 1.5092 | 2.488 | 3.016 | 1.128 | 1.5497 | 0.8033 | 1.2144 |
19-11 | 2.2592 | 2.6656 | 0.9696 | 1.4528 | 0.7925 | 1.2757 | 3.4352 | 3.9184 | 1.472 | 1.9552 | 1.2033 | 1.6865 | 2.9808 | 3.464 | 1.3472 | 1.8304 | 0.9632 | 1.4464 |
19-32 | 2.1888 | 2.7264 | 0.976 | 1.5136 | 0.7989 | 1.3365 | 3.4416 | 3.9792 | 1.4784 | 2.016 | 1.2097 | 1.7473 | 2.9872 | 3.5248 | 1.3536 | 1.8912 | 0.9696 | 1.5072 |
19-35 | 2.192 | 2.8432 | 0.9792 | 1.6304 | 0.8021 | 1.4533 | 3.4448 | 4.096 | 1.4816 | 2.1328 | 1.2129 | 1.8641 | 2.9904 | 3.6416 | 1.3568 | 2.008 | 0.9728 | 1.624 |
21-11 | 2.7456 | 3.464 | 1.3088 | 2.0272 | 1.1088 | 1.8272 | 3.9712 | 4.6896 | 1.8128 | 2.5312 | 1.6128 | 2.3312 | 3.4448 | 4.1632 | 1.7344 | 2.5312 | 1.3039 | 1.871 |
21-16 | 2.6784 | 3.3168 | 1.2416 | 1.88 | 1.0422 | 1.6806 | 3.904 | 4.5424 | 1.7456 | 2.384 | 1.4505 | 2.0889 | 3.3776 | 4.016 | 1.6672 | 2.3168 | 1.2352 | 1.8736 |
21-35 | 2.6672 | 3.4992 | 1.2304 | 2.0624 | 1.031 | 1.863 | 3.8928 | 4.7248 | 1.7344 | 2.5664 | 1.4393 | 2.2713 | 3.3664 | 4.1984 | 1.656 | 2.2309 | 1.2255 | 1.8003 |
21-41 | 2.6768 | 3.36 | 1.24 | 1.9232 | 1.0406 | 1.7238 | 3.9024 | 4.5856 | 1.744 | 2.4272 | 1.4489 | 2.1321 | 3.376 | 3.5792 | 1.6656 | 1.8688 | 1.2336 | 1.4368 |
23-21 | 3.0352 | 3.8624 | 1.4496 | 2.2768 | 1.2279 | 2.0551 | 4.2368 | 5.064 | 1.944 | 2.7712 | 1.6368 | 2.464 | 3.792 | 4.6192 | 1.9216 | 2.7488 | 1.4637 | 2.2896 |
23-35 | 3.024 | 4.0448 | 1.4384 | 2.4592 | 1.2167 | 2.2375 | 4.2256 | 5.2464 | 1.9328 | 2.9536 | 1.6256 | 2.6464 | 3.7808 | 4.8016 | 1.9104 | 2.6087 | 1.4525 | 2.1507 |
23-53 | 2.8992 | 3.9072 | 1.456 | 2.4816 | 1.2343 | 2.2599 | 4.2432 | 5.1088 | 1.9504 | 2.816 | 1.6432 | 2.5088 | 3.7984 | 4.664 | 1.928 | 2.7936 | 1.4672 | 2.2384 |
25-4 | 3.4512 | 4.48 | 1.7312 | 2.8816 | 1.4864 | 2.1904 | 4.8048 | 5.8272 | 2.2016 | 3.248 | 1.9568 | 2.872 | 4.2224 | 5.2496 | 2.2128 | 3.256 | 1.7133 | 2.4163 |
25-19 | 3.5312 | 4.7264 | 1.8112 | 3.0064 | 1.5664 | 2.7616 | 4.8848 | 6.0816 | 2.2816 | 3.4784 | 2.0368 | 3.2336 | 4.3024 | 5.4992 | 2.2928 | 3.4896 | 1.7933 | 2.7058 |
25-20 | 3.819 | 4.715 | 2.0173 | 3.1125 | 1.7733 | 2.8512 | 5.143 | 6.038 | 2.4877 | 3.5421 | 2.1872 | 3.2416 | 4.435 | 5.33 | 2.258 | 3.0182 | 1.8288 | 2.8928 |
25-35 | 3.4416 | 4.6656 | 1.7216 | 2.9456 | 1.4776 | 2.7016 | 4.7952 | 6.0192 | 2.192 | 3.416 | 1.8915 | 3.1155 | 4.2128 | 5.4368 | 2.2032 | 3.4272 | 1.7037 | 2.9277 |
25-61 | 3.4304 | 4.4848 | 1.7282 | 2.7648 | 1.4841 | 2.5208 | 4.784 | 5.8384 | 2.1808 | 3.2352 | 1.8803 | 2.9347 | 4.2016 | 5.256 | 2.192 | 3.2464 | 1.6912 | 2.7456 |