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Custom D38999 Series III Military Bayonet Electrical Connectors

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D38999 Series III Military Bayonet Electrical Connectors Manufacturers

Product introduction

●Comply with GJB599B (MIL-DTL-38999M) III series standards

●Three-head thread quick connection with anti-loosening mechanism

●Small size, light weight, high contact couple density

●With electromagnetic shielding function

●Contact parts are removable by crimping, and pins are prevented from being inserted obliquely.

●Has high-intensity vibration characteristics at high temperatures, suitable for use in harsh sandy and humid conditions

●The holes of 12#, 16# and 20# contact specifications can be equipped with optical fiber contacts.

●The holes of 12#, 10# and 8# contact specifications can be equipped with coaxial and shielded contacts.

●With stainless steel shell, titanium alloy shell, aluminum alloy shell and various coatings.

●It has high-intensity vibration characteristics at high temperatures and can be used in harsh sandy and humid conditions.

Usage: The product is used for circuit signal connection.

Usage environment: The product is used in complex environments such as strong vibration, rain, wind, sand and moisture.

Main technical performance

●Mechanical properties:

Material: Shell: aluminum alloy, stainless steel, titanium alloy

Insulator: Thermoset or Thermoplastic

Sealing body and sealing ring: silicone rubber

Coating: W type: Cadmium plated military green

Category F: Electroless Nickel Plating

Class K: Stainless steel passivated

Class FT: Aluminum alloy satin cadmium plated

TA type: titanium alloy

Contact material: copper alloy surface gold-plated, available in crimp type, welding type and printed version

Mechanical life: ≥500 plug and unplug cycles

Shock: 3ms half sine wave, acceleration peak 300g

Vibration: Sinusoidal: 60g with temperature cycling and simulation accessories (36h)

Random: at high temperature, frequency 100~1000Hz, power spectral density 1g²/Hz, corresponding root mean square value 41.7g

At ambient temperature: Frequency 100～1000Hz Power spectral density 5g²/Hz, corresponding root mean square value 49.5g

●Electrical performance:

Withstand voltage: V

Working grade *

M

N

I

II

Sea ​​level

1300

1000

1800

2300

21000m

800

600

1000

1000

Note: Different contact arrangements have different working levels. For details, see the mark in the upper right corner of the contact arrangement.

Contact resistance and rated current of contacts:

Contact specifications

Working diameter mm

Contact resistance mΩ

Rated current A

22D

Ф0.76

≤12

5

20#

Ф1.00

≤5

7.5

16#

Ф1.60

≤2.5

13

12#

Ф2.40

≤1.5

23

10#

Ф3.15

≤1.0

40

Insulation resistance: ≥5000MΩ (500VDC)

Shell conductivity:

Class W: 2.5mV Class F, FT: 1.0mV

K, TA category: 10mV

Electromagnetic interference shielding: at 100MHz~1GHz, the minimum attenuation is 85dB (Class F, Class W)

At 1GHz ~ 10GHz, the minimum attenuation is 65dB (Class F), 50dB (Class W)

8# dual coaxial contact: frequency bandwidth 0~20MHz

Rated voltage: 500V (AC) maximum, 125V (AC) at 21000 meters.

Voltage drop: inner and middle contacts ≤55mV at 1A, external c

 

●Environmental performance:

Temperature range: Class W: -65 ˚C ~ +175 ˚C

Category F, K, FT, TA: -65 ˚C ~ +200 ˚C

Salt spray resistance: W category: 500h

K, TA category: 1000h

Category F: 48h/96h

FT Class: 96h

Sealing: Mating connector meets MIL-DTL-38999M low air pressure impregnation requirements

Moist heat: per MIL-DTL-38999M: 10 cycles in 24 hours

Liquid resistance: Resistant to a variety of fuels, coolants, and solvents

Contact arrangement (view of the insertion surface of the needle insulator)

Note:
1. 20 # hole can be replaced with 20 # fiber optic contact piece;
2. 16 # hole can be replaced with 16 # shielding and 16 # fiber optic contacts;
3. The 12 # hole can be replaced with 12 # shielding, 12 # coaxial, and 12 # fiber optic contacts;
4. The 8 # hole can be replaced with 8 # dual coaxial, 8 # single coaxial, and 8 # differential contacts.



ABOUT US

Power-efficient electrical connectors.

Taizhou Henglian Electric Co., Ltd. was founded in April 2011, is located in the "Ginkgo town" reputation of the riverside city - Taixing City, is specialized in electrical connector development, production, sales of high-tech enterprises.

We are China Custom D38999 Series III Military Bayonet Electrical Connectors Manufacturers and OEM/ODM D38999 Series III Military Bayonet Electrical Connectors Suppliers.

There are more than 150 employees, including more than 30 people with various professional and technical titles, fixed assets of 30 million yuan, with a variety of mechanical processing equipment and testing equipment.

In recent years, the company has been rated as "Top Ten enterprises in Zhangqiao Town", "Top Ten enterprises in Zhangqiao Town", and won the "Taixing Outstanding Contribution Award" and other titles.

At present, the company's leading products are conforming to the military standard Y11, Y17, Y27, Y50, YGD, YLH, YM, YW, J599I, J599II, J599III, XC series circular electrical connectors, and J7, J14, J20J, J29A, J30J, J63A series rectangular electrical connectors. It is in line with the national standard Y2, Y4, YP, LYP, YD, and other series of circular electric connectors. The products cover the general staff, final assembly, sea installation, Second Artillery, weapons, aerospace and other military varieties nuclear energy, railway, national power grid, oil earth geophysical exploration, and other fields. The company has a technical center, and quality inspection center, with sophisticated production equipment, modern inspection facilities, and inspection and testing means. The products have the characteristics of three-defense function, high density, high reliability, electronic compatibility, etc., and can develop and produce various kinds of special electrical connectors for various users to meet customer needs.

The company is a qualified supplier of military electronic components, Marine equipment and aerospace of the Communications Department of the General Staff and the Ministry of Information Industry, and has passed the GJB9001C-2017 weapons and equipment quality management system certification and the second-level secret certification of weapons and equipment production and research units.

The company always adhere to the "integrity-based, unity and hard work, realistic innovation, the pursuit of excellence" spirit of enterprise, adhere to the concept of "brand create value", dedicated to customer service, so that Henglian quickly become the leader in the peer.

Taizhou Henglian Electric Co., Ltd. sincerely welcome domestic and foreign customers to visit and negotiate business!

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Industry Knowledge

How to Choose the Right D38999 Series III Military Bayonet Electrical Connector: Electrical and Mechanical Parameter Guide

1. Electrical Parameter Selection Guide

When selecting a D38999 Series III connector, it is crucial to consider electrical performance due to its widespread use in military, aerospace, nuclear energy, power, and geophysical exploration. Key electrical parameters include:

Parameter Typical Value/Range Description
Voltage Rating 500V – 1500V RMS Choose insulation level based on equipment requirements
Current Rating 3A – 50A/contact Related to wire diameter and contact type
Contact Resistance ≤5 mΩ Ensures low loss and high reliability
Insulation Resistance ≥5000 MΩ Enhances leakage resistance and environmental tolerance
Contact Type Pin-Socket, Coaxial, etc. Select according to signal type or power requirement
EMI/RFI Shielding Yes/No Designed for sensitive signals or high-frequency environments

Tip: Connectors from Taizhou Henglian Electric Co., Ltd. feature high reliability, strong electronic compatibility, and three-defense functions (waterproof, dustproof, corrosion-resistant) suitable for extreme environments.

2. Mechanical Parameter Selection Guide

D38999 Series III connectors are known for mechanical strength and ease of installation. Key mechanical parameters include:

Parameter Typical Value/Range Description
Connector Type Bayonet Quick connect/disconnect, suitable for military and aerospace applications
Shell Material Aluminum Alloy, Steel, Stainless Steel Choose based on strength and corrosion resistance requirements
Protection Level IP67 – IP68 Suitable for underwater or high-humidity environments
Temperature Range -65°C to +200°C Meets extreme high and low temperature requirements
Vibration Resistance 10-2000Hz, 20g Ensures no detachment during transportation or operation
Durability ≥500 mating cycles High-strength repeated use suitability

Tip: Taizhou Henglian Electric Co., Ltd. has advanced machining and testing equipment to ensure each batch meets strict military and aerospace mechanical standards.

3. Application and Standard Matching

When choosing a connector, consider the application scenario:

  • Military Equipment: Certified with GJB9001C-2017 and Level 2 security clearance, supporting Second Artillery, Navy equipment, etc.
  • Aerospace: High density, high reliability, and strong electronic compatibility.
  • Energy and Railways: Corrosion-resistant, waterproof, and dustproof for extreme outdoor environments.

Taizhou Henglian Electric Co., Ltd. offers Y11, Y17, Y27, Y50, YGD, YLH, YM, YW, J599I/II/III, and XC series circular connectors, as well as J7, J14, J20J, J29A, J30J, J63A rectangular connectors, with customization available for special requirements.

4. Parameter Comparison Example

Connector Model Current Rating Voltage Rating Temperature Range Protection Level Application
D38999 Series III, 9-pin 5A 500V -65°C ~ +175°C IP67 Aviation, Communication
D38999 Series III, 25-pin 7A 600V -55°C ~ +200°C IP68 Military Vehicles, Navy Equipment
D38999 Series III, 37-pin 10A 1000V -65°C ~ +200°C IP68 Aerospace, Nuclear Energy, Oil Exploration

Recommendation: Evaluate current, voltage, pin count, and environmental conditions comprehensively to select the most suitable model.

5. Importance of Supplier Selection

Choosing the right connector also depends on the supplier’s R&D, production, and quality control capabilities. Taizhou Henglian Electric Co., Ltd. features:

  • Technical and quality inspection centers to ensure military-grade design and production.
  • High-precision machining and testing equipment to guarantee product reliability.
  • Customization capability to meet special environmental and application needs.

By combining electrical and mechanical parameters with supplier capability, users can efficiently select D38999 Series III connectors to ensure stable performance in high-risk environments.

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