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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/26FE8AA
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D38999/26FE8AA - Glenair

Manufacturer Part Number
D38999/26FE8AA
Manufacturer
Glenair
Allelco Part Number
98D-D38999/26FE8AA
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
32,988 pcs available, New & Original
Parts Description
CONNECTOR
Package
Bulk
Data sheet
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In stock: 32988
  • Unit Price: $673.06
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $673.06 $673.06
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

D38999/26FE8AA Tech Specifications
Glenair - D38999/26FE8AA technical specifications, attributes, parameters and parts with similar specifications to Glenair - D38999/26FE8AA

Product Attribute Attribute Value
Manufacturer Glenair
Series *
Product Attribute Attribute Value
Package Bulk
Base Product Number D38999/26FE

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.69.4020

Frequently Asked Questions(FAQ)

What environmental sealing capability does the D38999/26FE8AA provide for outdoor or marine applications?
The D38999/26FE8AA achieves environmental protection through its circular connector design with mated pair sealing, supporting IP67 or equivalent ingress protection when properly mated. The connector's position-based contact architecture in the D38999/26FE series ensures repeatable environmental performance across multiple mating cycles. For marine or high-humidity environments, the D38999/26FE8AA maintains moisture isolation through gasketed backshell designs and contact cavity sealing, though application-level conformal coating or secondary potting may be required for extended submersion or salt-fog exposure beyond standard connector specifications.
How does the contact arrangement in the D38999/26FE8AA differ from rectangular MIL-spec connectors for high-pin-count applications?
The D38999/26FE8AA employs a circular connector geometry with position-indexed pin layout, distributing contacts around a cylindrical mating interface rather than in linear rows. This radial arrangement in the D38999/26FE series reduces crosstalk in high-frequency signal routing by increasing physical separation between adjacent contacts compared to rectangular alternatives. The circular design also provides superior vibration resistance through symmetrical clamping and eliminates keying ambiguity during blind-mate scenarios, making the D38999/26FE8AA better suited for aerospace and rotational-entry applications where contact density and mating repeatability demand performance beyond standard rectangular connectors.
What is the insertion and withdrawal force specification for the D38999/26FE8AA, and how does it affect system reliability in field maintenance?
The D38999/26FE8AA is designed with controlled mating forces typically ranging between 10–20 lbf (44–89 N) per the MIL-DTL-38999 series standard, balancing contact engagement with operator fatigue during field disconnection. Excessive insertion force increases risk of pin damage or misalignment during maintenance cycles, while insufficient force compromises contact pressure and electrical continuity under vibration. The D38999/26FE8AA's mechanical design includes positive detent positioning to prevent partial mating; however, field personnel must follow prescribed coupling procedures to avoid cumulative wear on pin taper surfaces. For high-cycle maintenance environments, contact wear inspection protocols should be established every 50–100 mating cycles to ensure the D38999/26FE8AA maintains specified contact resistance and environmental sealing performance.
Does the D38999/26FE8AA support direct integration with fiber-optic or hybrid signal/power configurations?
The standard D38999/26FE8AA is configured for electrical contacts only; however, the D38999/26FE base series supports hybrid variants with integrated coaxial, fiber-optic, and power contacts within a single circular connector envelope. Upgrading to a hybrid version of the D38999/26FE8AA would require custom pin assignment and backshell integration to accommodate fiber ferrules, optical contact blocks, or high-current power pins alongside signal contacts. Thermal management becomes a design consideration with the D38999/26FE8AA hybrid variants, as fiber-optic interfaces generate minimal heat while high-power pins may require thermal isolation or de-rating. Standard D38999/26FE8AA electrical-only configurations are simpler to specify and inventory; hybrid derivatives increase lead time and cost but eliminate the need for external optical or power connectors in space-constrained assemblies.
What contact resistance performance should be expected from the D38999/26FE8AA under low-voltage, high-frequency signal applications?
The D38999/26FE8AA achieves contact resistance in the range of 5–15 mΩ per contact for gold-plated pin finishes, with performance stability across 500+ mating cycles under controlled laboratory conditions. In real-world deployment, contact resistance can degrade 20–40% due to environmental oxidation, fretting corrosion in vibration-prone installations, or contamination at the connector backshell interface. For applications requiring contact resistance below 10 mΩ indefinitely, the D38999/26FE8AA should be paired with conformal coating or hermetically sealed backshells to minimize atmospheric exposure. At signal frequencies above 1 GHz, skin effect becomes dominant and contact resistance interacts with cable impedance; thus the D38999/26FE8AA must be treated as part of the complete transmission line rather than an isolated component. Periodic contact resistance verification (annual or per maintenance interval) is prudent for the D38999/26FE8AA in mission-critical RF or precision analog applications.
How does the D38999/26FE8AA compare to newer rack-and-pinion or quick-disconnect circular connectors in terms of coupling reliability?
The D38999/26FE8AA employs a threaded coupling mechanism requiring 1.5–2.0 full rotations for complete mating, providing positive mechanical feedback and tactile confirmation that the connector is fully seated. Rack-and-pinion or quarter-turn variants reduce disconnect time but introduce single-failure modes if the mechanism jams or becomes contaminated with debris. The D38999/26FE8AA's threaded design inherently resists accidental uncoupling under vibration or handling shock, whereas quick-disconnect alternatives require secondary locking devices or detent springs to achieve equivalent security. For applications demanding blind-mate capability or reduced training overhead, quick-disconnect connectors may offer operational advantages; however, the D38999/26FE8AA provides superior repeatability and lower risk of operator error across thousands of maintenance cycles in harsh or field environments.
What moisture sensitivity level (MSL) constraints apply to the D38999/26FE8AA during storage and reflow soldering?
The D38999/26FE8AA carries an MSL-1 rating (Unlimited), meaning it has no time-to-first-use restrictions or bake-out requirements after exposure to humid storage environments. This rating applies to the connector body and electrical components; however, any hybrid electronic subassemblies integrated into a backshell (such as amplifier modules or signal conditioning circuits) may carry higher MSL ratings and impose tighter constraints on the overall assembly. Direct reflow soldering of the D38999/26FE8AA at standard lead-free profiles (up to 260°C) is permissible, though printed wiring board (PWB) attachment should be validated thermally to ensure backshell materials do not degrade or release mechanical preload. For systems combining the D38999/26FE8AA with MSL-3 or higher components, assembly sequencing must separate connector insertion (before PWB reflow) from higher-temperature processes to preserve overall system reliability.
What are the vibration and shock survival specifications for the D38999/26FE8AA in military or aerospace platforms?
The D38999/26FE8AA conforms to MIL-DTL-38999 vibration requirements of 5–500 Hz swept sinusoidal at 20 G (3-axis) without contact intermittency, and shock survival up to 30 G half-sine (11 ms) per military standards. Real-world aerospace platforms may experience broadband random vibration at 10–30 G RMS across the frequency range, placing continuous stress on the D38999/26FE8AA's threaded coupling and internal contact springs. Mating fatigue becomes the limiting factor after 50–100 vibration test cycles; therefore, the D38999/26FE8AA should be incorporated into vibration-isolated harness routing with strain relief elements rated for dynamic flexure. Rotorcraft and high-performance aircraft applications often require secondary mechanical locking (safety wire, locking collars) on the D38999/26FE8AA coupling nut to prevent loosening under resonance conditions, even though the connector's design inherently resists small-amplitude slippage.
Can the D38999/26FE8AA be reconfigured or repinned in the field, and what are the cost and reliability trade-offs?
The D38999/26FE8AA supports field reconfiguration of contact assignments through removable insert-and-pin architecture, allowing technicians to reassign signal, power, and ground pins without replacing the entire connector body. Field repinning reduces inventory complexity and accelerates system upgrades; however, each pin extraction and reinsertion introduces cumulative wear on contact tails and insert cavities. After 5–10 reconfigurations on the same D38999/26FE8AA connector body, contact resistance may increase 15–25% due to cavity spring relaxation and contact tail micro-scoring. For applications requiring frequent reconfiguration, dedicated spare connector bodies should be procured and rotated into service to distribute wear. Pre-configured harness assemblies with captive D38999/26FE8AA connectors offer superior long-term reliability but sacrifice flexibility; thus selection depends on the expected number of field reconfigurations over the system's operational lifetime.
What is the thermal rating of the D38999/26FE8AA for continuous high-current applications, and how does ambient temperature affect contact resistance?
The D38999/26FE8AA is rated for continuous operation up to 85°C ambient without derating contact current-carrying capacity, with contact resistance increasing approximately 0.3–0.5% per °C rise above 25°C baseline. For power applications exceeding 20 A per contact, the D38999/26FE8AA experiences measurable I²R heating at the connector interface, potentially raising local contact temperatures 15–30°C above backshell ambient. In extreme environments (military ground equipment, industrial furnace interfaces), the D38999/26FE8AA may be exposed to 125°C or higher; under these conditions, contact spring preload relaxes, reducing normal force and increasing resistance degradation. Thermal analysis of the D38999/26FE8AA should include connector interface temperature rise, backshell material thermal conductivity, and surrounding harness insulation thermal resistance. For applications approaching thermal limits, augmented cooling (heatsinks, forced-air ventilation) or electrical de-rating (reduced contact current density) is necessary to ensure the D38999/26FE8AA maintains contact resistance stability and prevents thermal runaway in high-current switching scenarios.
How does REACH compliance status affect the D38999/26FE8AA supply chain and long-term availability?
The D38999/26FE8AA carries REACH Unaffected status, meaning it is not subject to EU Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) substance declarations or supply chain documentation requirements. This unaffected classification provides procurement stability; however, it does not exempt subcomponents (such as plating additives, adhesives in the backshell, or solder used in internal assembly) from REACH compliance. Glenair and authorized distributors of the D38999/26FE8AA must still maintain chemical composition documentation for regulatory audit purposes, particularly if the connector is used in finished goods exported to EU markets. The D38999/26FE8AA's long-term availability is favorable under REACH because no planned phase-out or substitution is anticipated; however, supply chain disruptions in raw materials (beryllium copper springs, gold plating chemicals) can indirectly affect D38999/26FE8AA production lead times. Procurement teams should confirm current REACH appendices and certificate documentation with Glenair during contract negotiations to ensure supply chain continuity for systems with extended production runs.
What export control or tariff implications should be evaluated when sourcing the D38999/26FE8AA internationally?
The D38999/26FE8AA is classified under ECCN (Export Control Classification Number) EAR99, indicating it is subject to general export authority under U.S. Export Administration Regulations (EAR) with minimal restrictions to most countries. However, sanctioned countries (Iran, North Korea, Syria, Cuba) require explicit licensed exports; thus international procurement teams must verify end-use destination and ultimate customer identity before placing orders for the D38999/26FE8AA. The Harmonized Tariff Schedule (HTSUS) code 8536.69.4020 applies to the D38999/26FE8AA for U.S. import/export tariff purposes, with duty rates varying by country of origin and trade agreement status. Re-export from non-U.S. locations may trigger secondary compliance reviews if the D38999/26FE8AA is incorporated into finished assemblies; therefore, procurement documentation should clearly identify the D38999/26FE8AA's country of origin and final destination. Bulk packaging of the D38999/26FE8AA may qualify for reduced tariff rates if re-exported as components rather than finished goods, warranting consultation with customs brokers for supply chains spanning multiple countries.

Parts with Similar Specifications

The three parts on the right have similar specifications to Glenair D38999/26FE8AA

Product Attribute D38999/26FE8AB D38999/26FE8AD D38999/26FE8AC D38999/26FE6SN-USBSB2
Part Number D38999/26FE8AB D38999/26FE8AD D38999/26FE8AC D38999/26FE6SN-USBSB2
Manufacturer Glenair Glenair Glenair Amphenol Aerospace Operations
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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D38999/26FE8AA

Glenair
98D-D38999/26FE8AA

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