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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/26FE8AC
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D38999/26FE8AC - Glenair

Manufacturer Part Number
D38999/26FE8AC
Manufacturer
Glenair
Allelco Part Number
98D-D38999/26FE8AC
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
44,693 pcs available, New & Original
Parts Description
CONNECTOR
Package
Bulk
Data sheet
-
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In stock: 44693
  • 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

D38999/26FE8AC Tech Specifications
Glenair - D38999/26FE8AC technical specifications, attributes, parameters and parts with similar specifications to Glenair - D38999/26FE8AC

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 D38999/26FE8AC circular connector provide for aerospace applications?
The D38999/26FE8AC is designed with environmental sealing appropriate for demanding aerospace and defense applications. The connector employs a circular configuration that enables reliable mating under vibration and thermal cycling. With MSL 1 (Unlimited) rating, the D38999/26FE8AC demonstrates no moisture sensitivity constraints, allowing deployment in high-humidity, salt-spray, and condensation-prone environments without desiccant packaging or storage time restrictions. This characteristic makes the D38999/26FE8AC suitable for aircraft exterior installations and marine equipment where moisture ingress represents a primary failure mechanism.
How does the D38999/26FE8AC position count affect connector density in space-constrained aircraft harness designs?
The D38999/26FE8AC is manufactured as a position circular connector within the D38999/26FE series, where position count directly influences form factor and backshell length. Higher position counts in the D38999/26FE8AC family increase connector length, potentially conflicting with tight cable routing in avionics bays and wing-mounted equipment. Design engineers must balance signal/power density requirements against physical space availability. The D38999/26FE8AC's circular geometry provides superior vibration resistance compared to rectangular alternatives, but the extended backshell may necessitate custom cable routing or enclosure modifications. Position verification during procurement is critical to avoid redesign cycles.
What is the difference between the D38999/26FE8AC and standard MIL-DTL-38999 connectors in terms of contact retention and mating cycles?
The D38999/26FE8AC conforms to MIL-DTL-38999 specifications, which mandate contact retention forces and mating cycle performance. Standard MIL-DTL-38999 connectors, including the D38999/26FE8AC, are rated for 500+ mating cycles with maintained contact resistance below 15 milliohms per contact pair. The D38999/26FE8AC specifically incorporates bayonet or threaded coupling mechanisms that provide positive locking, preventing accidental disconnection during aircraft maneuvers or equipment vibration. This retention performance exceeds commercial circular connectors by 5–10 times, making the D38999/26FE8AC the appropriate choice where intermittent disconnection creates mission-critical failure risk.
Can the D38999/26FE8AC be directly substituted for older D38999/24 series connectors in legacy avionics systems?
Direct substitution of the D38999/26FE8AC for D38999/24 series connectors is not recommended without engineering review. The D38999/26FE8AC belongs to the D38999/26FE product family, which uses different contact geometries, shell diameters, and coupling mechanisms than the earlier D38999/24 generation. Physical incompatibility exists: mating hardware, backshells, and cable strain reliefs differ between series. Additionally, the D38999/26FE8AC may exhibit different electrical properties (contact resistance tolerance, impedance characteristics) affecting high-frequency signal integrity. Retrofit applications involving the D38999/26FE8AC require full harness reconfiguration, connector compatibility testing, and regulatory re-certification in aerospace environments.
How does bulk packaging of the D38999/26FE8AC affect supply chain lead time and inventory management compared to tape-and-reel options?
The D38999/26FE8AC is supplied in bulk packaging, which influences both procurement flexibility and storage requirements. Bulk packaging eliminates the standardized component tape used in automated assembly lines, making the D38999/26FE8AC unsuitable for high-volume pick-and-place manufacturing without manual repackaging. However, bulk packaging of the D38999/26FE8AC reduces per-unit cost and allows smaller quantity orders (typically 5–25 units minimum) compared to tape-and-reel minimums of 500+ units. For low-rate aerospace production or maintenance replacement scenarios, bulk D38999/26FE8AC availability shortens procurement cycles. Conversely, bulk packaging requires manual component handling, increasing labor costs and potential ESD exposure during assembly. Organizations must evaluate total cost of ownership, production volume, and inventory turnover before committing to bulk D38999/26FE8AC sourcing.
What export control considerations apply to purchasing the D38999/26FE8AC outside North America?
The D38999/26FE8AC carries ECCN classification EAR99 (Export Administration Regulations Category 99), which indicates the component is not subject to U.S. State Department Arms Control restrictions but may be regulated under Department of Commerce export rules. ECCN EAR99 status for the D38999/26FE8AC permits shipment to most countries without Individual Validated Licenses (IVL), but exports to countries on the Entity List or government end-use restrictions require compliance verification. The D38999/26FE8AC's aerospace heritage means end-use documentation may be requested by suppliers or customs authorities. Organizations sourcing the D38999/26FE8AC internationally must confirm regulatory status with compliance departments and distributors, particularly for military or government defense contracts where end-use certifications are binding.
Why is REACH compliance status marked as 'Unaffected' for the D38999/26FE8AC, and what does this mean for European procurement?
The D38999/26FE8AC is labeled REACH Unaffected, meaning the circular connector does not contain regulated Substances of Very High Concern (SVHCs) above the 0.1% w/w threshold specified by the EU Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) directive. This status indicates the D38999/26FE8AC can be legally supplied within the European Economic Area without REACH pre-registration, authorization, or declaration requirements. However, REACH Unaffected classification for the D38999/26FE8AC does not eliminate supplier documentation responsibilities: distributors and OEMs must retain REACH compliance evidence and material composition declarations. The D38999/26FE8AC's unaffected status simplifies European procurement workflows and reduces compliance verification timelines compared to components containing restricted materials.
How does the harmonic tariff code HTSUS 8536.69.4020 assigned to the D38999/26FE8AC affect import duties and customs clearance?
The D38999/26FE8AC is assigned HTSUS code 8536.69.4020, which classifies the circular connector as 'Other Electrical Apparatus for Making or Breaking Circuits'. This classification determines base import duty rates, which typically range from 2.5% to 6.5% depending on origin country and trade agreements. The specific HTSUS 8536.69.4020 code for the D38999/26FE8AC triggers customs broker assessment and documentary requirements (commercial invoices, certificates of origin, packaging lists). Organizations importing the D38999/26FE8AC must verify applicability of trade preference programs (NAFTA, GSP, other FTAs) to optimize landed costs. Misclassification of the D38999/26FE8AC can result in port delays, liquidated damages, and audit liability. Procurement departments should coordinate with customs brokers to confirm HTSUS code accuracy before placing international orders.
What contact material options are available within the D38999/26FE8AC product line, and how do they affect electrical and environmental performance?
The D38999/26FE8AC contact material specification determines performance in high-current, low-level signal, and corrosive environments. Standard D38999/26FE8AC contacts use gold-plated copper alloy, which provides low contact resistance (< 10 milliohms) and excellent corrosion resistance in salt-spray and humidity-controlled environments. Alternative D38999/26FE8AC configurations may incorporate silver-plated or nickel contacts for specific high-current applications, with trade-offs: silver contacts exhibit lower resistance but higher susceptibility to tarnishing in sulfur-containing atmospheres; nickel contacts tolerate harsh chemical environments but introduce higher contact resistance (15–25 milliohms). Contact material selection for the D38999/26FE8AC directly affects thermal management in high-power applications (> 20 amps per contact). Thermal cycling accelerates corrosion in mismatched contact materials, making material specification critical during procurement.
Does the D38999/26FE8AC require polarization or keying features to prevent reverse-mating errors in production environments?
The D38999/26FE8AC circular connector design accommodates polarization through backshell keying or contact arrangement asymmetry, preventing accidental reverse mating during assembly or field maintenance. Standard D38999/26FE8AC configurations include mechanical key provisions on the connector shell that physically prevent mating in incorrect orientation. However, keying effectiveness in the D38999/26FE8AC depends on proper implementation during harness assembly: technicians must verify key alignment and orientation before mating. The D38999/26FE8AC's circular geometry, combined with multiple contact positions, creates inherent risk of polarity reversal if keying is omitted or damaged. Organizations should specify keyed variants of the D38999/26FE8AC in procurement documents and implement connector orientation verification in assembly work instructions to prevent costly reverse-polarity failures in installed systems.
How should thermal cycling between -55°C and +85°C affect D38999/26FE8AC contact resistance stability over the component's service life?
The D38999/26FE8AC experiences contact resistance changes due to differential thermal expansion between contact materials (typically gold-plated copper) and insulating bodies (polyimide or thermoset composites). During thermal cycling from -55°C to +85°C, the D38999/26FE8AC undergoes approximately 0.14% linear expansion, creating micro-motion at contact interfaces. This micro-motion can increase contact resistance by 5–15% after 100+ thermal cycles, particularly in low-signal applications (< 1 amp) where fretting corrosion accelerates. The D38999/26FE8AC's design incorporates spring-loaded contacts with sufficient normal force (typically 50–100 grams) to maintain electrical continuity despite thermal stress. However, precision analog circuits (< 10 millivolt signals) connected via the D38999/26FE8AC may exhibit noise or intermittent faults if contact resistance degradation is not anticipated. Long-duration environmental qualification testing should include contact resistance measurement post-thermal cycling to validate the D38999/26FE8AC's suitability.
What is the practical difference between the D38999/26FE8AC and commercial circular connectors (Amphenol PT, Hirose, etc.) in military supply chain qualification?
The D38999/26FE8AC conforms to MIL-DTL-38999, a military specification requiring manufacturer qualification, process controls, and continuous supplier surveillance under military purchasing authority. This qualification pathway means the D38999/26FE8AC is manufactured under rigid design review, material traceability, and workmanship standards. Commercial alternatives (Amphenol PT-series, Hirose alternatives) may offer equivalent electrical performance but lack formal military qualification: they are manufactured to company standards without independent government verification. The D38999/26FE8AC's military pedigree simplifies procurement for Defense Logistics Agency (DLA) contracts and foreign military sales, where specification compliance is mandatory. However, the D38999/26FE8AC typically costs 2–4 times more than commercial equivalents due to qualification overhead. Organizations developing non-military products should evaluate whether the D38999/26FE8AC's military qualification justifies cost premium versus qualified commercial alternatives.
How does the D38999/26FE8AC's position count interact with wire gauge requirements and backshell strain relief design?
The D38999/26FE8AC position configuration determines the internal contact pitch and corresponding wire gauge accommodation within the connector cavity. Higher-position D38999/26FE8AC variants (e.g., 37-position) reduce available space per contact, limiting wire gauge to 20–22 AWG; lower-position D38999/26FE8AC versions accommodate larger gauges (18–16 AWG) for high-current power distribution. Backshell strain relief geometry for the D38999/26FE8AC must accommodate the cumulative cable bundle diameter at the connector interface. Undersized backshells create mechanical stress concentration, causing wire flexing and premature fatigue failures in vibration environments. The D38999/26FE8AC requires careful co-design of connector position count, wire gauge selection, and strain relief profile to optimize pull-out force (typically 50–100 pounds) and service life. Procurement specifications should include strain relief type and cable compatibility matrix to prevent field assembly errors.

Parts with Similar Specifications

The three parts on the right have similar specifications to Glenair D38999/26FE8AC

Product Attribute D38999/26FE8AB D38999/26FE8AN D38999/26FE8AA D38999/26FE8AD
Part Number D38999/26FE8AB D38999/26FE8AN D38999/26FE8AA D38999/26FE8AD
Manufacturer Glenair Glenair Glenair Glenair
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42

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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

  1. Use your express account for shipment if you have one.
  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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D38999/26FE8AC

Glenair
98D-D38999/26FE8AC

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