Published on 10/13/2026
MIL-C-17 is a legacy designation associated with the RF cable specification now identified as MIL-DTL-17; IPC/WHMA-A-620 addresses cable and wire-harness manufacturing and acceptance. They cover different layers of a purchase, so neither name alone proves that a completed RF assembly meets your drawing, RF limits or qualification requirements.
A buyer may request RG316, IPC Class 3 and a VSWR report in one sentence. Those requests need separate evidence: exact bulk cable identity, agreed assembly acceptance criteria and measured RF performance. A plausible label is not a substitute for each record.
This guide explains how to turn standards into a clear RFQ. It makes no claim that SigmaRF has a particular certification, QPL listing or customer-specific approval.
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The active DLA specification covers flexible and semirigid RF cables, including solid and semisolid dielectric constructions. Associated detail sheets define particular cable requirements. Use the exact M17 part identification and the applicable detail sheet rather than asking for generic military-style coax.
| Layer | What to specify | Evidence to request |
|---|---|---|
| Bulk cable | Exact M17 designation and required revision | Material identity and applicable conformance records |
| Connector | Exact part and interface requirements | Drawing and required component evidence |
| Assembly | Customer drawing and acceptance conditions | Dimensional and workmanship records |
| RF performance | Band, insertion-loss and matching limits | Finished-assembly test results |
A commercial cable described as RG316 or built to similar dimensions is not automatically a qualified military supply. One published RG316 datasheet explicitly calls its product commercial non-QPL; that distinction illustrates why procurement wording and qualification evidence matter.
IPC/WHMA-A-620 describes materials, methods, tests and acceptance criteria for crimped, mechanically secured and soldered interconnections and related cable/harness assembly work. Agree the revision and acceptance class in the purchase documents instead of relying on a general IPC-compliant claim.
| Class context | General intent | Buyer action |
|---|---|---|
| Class 1 | General electronic products | Confirm that the class fits the end use |
| Class 2 | Dedicated-service products | Document the required acceptance class |
| Class 3 | High-performance/harsh-environment products | Flow down the appropriate contract requirements |
The standard's public scope does not specify the frequency of in-process or end-product inspection. Inspection coverage and sampling must be defined separately. A Class 3 reference is not, by itself, a statement that every item receives every test.
A termination can meet workmanship acceptance yet fail an insertion-loss target at the upper operating frequency. Conversely, an RF pass at room temperature does not prove the required environmental or workmanship compliance. Write both layers into the acceptance plan.
Step 01
State the RF band
Specify the complete operating range, not only a nominal center frequency. Name insertion loss, VSWR or return loss limits and any phase requirement.
Step 02
State the mechanical drawing
Define length reference, tolerance, connector orientation, strain relief, marking and revision. The drawing controls details not resolved by a generic standard name.
Step 03
State the inspection record
Name the required visual, dimensional, electrical and RF checks, coverage or sampling plan, and documents to accompany delivery.
Specify the loss you can afford, not only the cable name
Send SigmaRF your frequency band, connector interfaces, installed length and insertion-loss target. Every assembly is VNA-swept for VSWR and insertion loss before shipment.
Specify a Custom AssemblyDistinguish personnel training, process capability, component qualification, assembly conformance and customer approval. These are not interchangeable credentials. Request the evidence that applies to the exact product and contract rather than a certificate with a familiar logo.
| Claim | Question that makes it useful |
|---|---|
| Built using M17 cable | Which exact cable and what required qualification evidence? |
| IPC assembly acceptance | Which revision, class and inspection coverage are agreed? |
| 100% tested | Which tests, over which band, with what limits and identifiers? |
| Defense suitable | What program requirements and approvals apply to this assembly? |
Read SigmaRF's What Does a Cable Assembly Test Report Include and How to Specify a Custom Coaxial Cable Assembly for the document handoff. This article separates standard scope from product-specific proof.
Illustrative procurement breakdown for a 50-piece RF assembly order. These are example requirements, not claimed SigmaRF certifications or an inspection SOP.
A complete RFQ resolves all these layers before manufacture. Do not let a shorthand MIL/IPC label conceal missing numerical acceptance limits or qualification evidence.
Is MIL-C-17 the current RF cable specification name?
It is a legacy designation. DLA identifies the active general RF cable specification as MIL-DTL-17. Confirm the exact applicable detail sheet and contract revision.
Does RG316 mean military qualified?
No. RG316 identifies a cable family, and commercial non-QPL versions exist. Require the exact material identity and qualification evidence your contract needs.
What does IPC/WHMA-A-620 cover?
It covers manufacturing and acceptance of cable and wire-harness assemblies, including crimped, soldered and mechanically secured interconnections. Agree the revision and class.
Does IPC Class 3 mean every cable is tested?
Not automatically. The public standard scope does not set in-process or end-product inspection frequency. Define inspection coverage and test requirements separately.
Does a good VSWR prove standards compliance?
No. VSWR is one RF matching measurement. Workmanship, material qualification, dimensions and environmental requirements need their own evidence.
What should I ask an RF assembly supplier for?
Request exact parts, drawing revision, agreed standard/class, RF acceptance limits, inspection coverage and the documents required for that product and contract.
Standards are useful when their scope is tied to the actual order. Separate cable requirements, assembly acceptance and RF performance, then require the right evidence for each.
SigmaRF VNA-sweeps every assembly for VSWR and insertion loss before shipment across its stated 100 MHz to 40 GHz capability range. That testing claim is not a claim of MIL qualification or IPC certification. SigmaRF has Vadodara volume and Cleveland-area precision facilities, with lead times as short as 2 days for suitable builds; confirm any additional qualification and document requirements before ordering.
Specify the loss you can afford, not only the cable name
Send SigmaRF your frequency band, connector interfaces, installed length and insertion-loss target. Every assembly is VNA-swept for VSWR and insertion loss before shipment.
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