Every sourcing file ends up asking the same question: how do you separate a genuine mil-dtl-26482 manufacturer from a trading desk that simply forwards spec sheets? The same test applies when you qualify any military connector manufacturer — which claims arrive with a document you can attach to the purchase order, and which are only marketing language. This guide uses the MS3111E22-21PN data as a worked example: a ten-point vetting checklist, an evidence dossier that maps each claim to the standard behind it, and a part-number decode you can hand straight to an engineer.
Before you can audit a supplier you need a part to audit against. These are the facts the product page states for MS3111E22-21PN — and the ones you will be asked to prove in writing.
Match the insert arrangement and the keying position to the mating half before you release the order, then check the plating and sealing documents against the dossier table further down this page. A connector that mates but is keyed wrongly will pass inspection and still fail in the field.
| Parameter | Specification |
|---|---|
| Shell material | Aluminium alloy, cadmium plated |
| Contact plating | Gold over nickel, precision machined |
| Insert material | Thermoplastic, chemical resistant |
| Temperature range | −65 °C to +175 °C |
| Mating cycles | 500 minimum |
| Sealing performance | IP68, submersible to 10 m depth |
| Current rating | Up to 5 A per contact |
| Voltage rating | Up to 500 V |
| Coupling | Quick bayonet, keyed to prevent mis-mating |
| Compliance | MIL-DTL-26482 Series I, Revision G; manufactured under an ISO 9001:2015 certified system; RoHS/REACH compliant versions available |
The product page names aerospace avionics and flight control systems, ground combat vehicle electronics, naval shipboard equipment and subsystems, undersea sensor arrays and communication buoys, and ruggedized industrial automation in oil and gas, mining and heavy machinery.
A claim is only useful once it names the standard it was tested to and the document that proves it. Use this mapping as the request list for the quote.
| Claim | Governing standard | Document to request |
|---|---|---|
| Cadmium-plated aluminium alloy shell | MIL-STD-171 | Plating certificate and process specification |
| EMI/RFI shielding effectiveness | MIL-STD-461 | EMI test report for the shell style and coupling |
| IP68 sealing, submersible to 10 m | IEC 60529 (IP code) | Immersion test report plus method statement |
| 500 mating cycles minimum | MIL-DTL-26482 Series I | Mating-cycle endurance report |
| Gold-over-nickel contact plating | MIL-DTL-26482 Series I | Contact finish thickness certificate |
| ISO 9001:2015 quality system | ISO 9001:2015 | Current certificate with scope, number and validity dates |
| MIL-DTL-26482 Series I, Revision G compliance | MIL-DTL-26482 Rev G | Certificate of Conformance issued per lot |
| RoHS and REACH compliance | EU 2011/65/EU; EC 1907/2006 | Declaration of conformity and material declaration |
| DFARS, TAA and ITAR posture | DFARS 252.225-7012; ITAR (22 CFR 120–130) | Written origin and export-control statement |
Series I numbers are positional, not descriptive. Read the string left to right and each block answers a different purchasing question.
The wall-mounting receptacle family, made for panel and bulkhead mounting. This block tells you how the connector is fixed to the equipment, not what it carries.
The class letter defines the environmental variant of the insert and the backshell interface. The environmental classes are the sealed versions.
Shell size sets the shell diameter and coupling thread. It is not the contact count — a common and expensive misreading in cross-reference work.
The contact layout used inside that shell size. Two connectors can share shell size 22 and still be physically incompatible because the arrangement differs.
Pin contacts. The mating half of the pair uses socket contacts, so this field tells you which side of the harness you are buying.
The final position designator, generally read as the normal rotation, while alternate rotations use other letters. Confirm it against the supplier's arrangement chart.
Do not order from the number alone. Confirm contact quantity, contact size and keying position against the insert arrangement drawing for the exact variant before you release a purchase order, and keep the drawing with the Certificate of Conformance.
Different deployment environments put different clauses of the datasheet under pressure. Start with the environment, then let the specification — not the unit price — decide the variant.
Send the part number, the quantity and the documents your quality file requires, and both can be answered in the same reply.
Keep adjacent product options together for a faster catalog comparison.
Discover the Y27 series 4PIN circular electrical connectors, including models Y27A-08-04-TJⅡ and Y27A-08-04-ZKⅡB. Engineered for durability and efficiency in harsh environments, these IP67-rated…
View product
Professional-grade Y50DX series 5-pin circular cycles, and military-grade shock resistance. Ideal for robotics, automation, and harsh environment applications.
View product
Discover the J14F Series Rectangular Electrical Connector: engineered for extreme environments with IP67 sealing, high current capacity (30A), and robust temperature resilience (-55 C to +125 C)…
View productreview the product details, images, and specifications presented on the official product page.
use the application and use-case information published on the official product page.
confirm the specifications and options listed for the exact product variant before placing an order.
check the official product page or ask the supplier about options shown for the selected product.
use the official contact or inquiry path provided on the site.
include the product page, intended use, required quantity, and any specifications you need the supplier to review.
