What an Aerospace Wire Harness Costs, and Why
An aerospace harness is priced on termination count, connectors, workmanship class, test, documentation and the paperwork that proves every part is genuine, spread over the quantity you order. Labor per termination and connector cost and availability usually decide the number, and most of both are fixed by the drawing and the purchase order.
Updated
The short answer
A harness costs what its connectors and wire, the labor to cut, strip, terminate, route and protect every conductor, the inspection and electrical test, and the documentation add up to. Connector price and lead time, plus labor per termination, are usually the two biggest lines.
No neutral published price list exists for aerospace harnesses, and we will not invent one. Two harnesses with the same number of wires can differ in price several times over because one is Class 3 with the space addendum, potted backshells, hipot and insulation resistance test on every unit and a full AS9102 first article, and the other is a Class 2 test cable. This guide explains each driver, what the buyer controls, and the few public figures we could verify.
How a harness shop builds a quote
Most harness shops price a job from the wire list and the parts list, not from a picture of the finished assembly. If you understand the blocks they use, you can read any harness quote line by line.
- Material: connectors, contacts, backshells, wire and cable, sleeving, labels, heat shrink, potting compound and lacing, bought to your part numbers and sources.
- Termination labor: cut, strip, crimp or solder and insert, counted per wire end. This scales almost directly with termination count.
- Assembly labor: routing on the form board, breakouts, ties or lacing, shield terminations, protective covering, backshell and strain relief installation, marking.
- Setup and engineering: form board build, test program or test adapter, work instructions, and tooling checks such as crimp pull samples.
- Inspection and test: in-process and final visual inspection to the class you name, plus the electrical tests your drawing or test specification calls for.
- Documentation: traveler, test data by serial number, first article report, certificates for wire, connectors and processes, and the certificate of conformance.
Cost drivers at a glance
The table lists the drivers that move a harness quote the most, with the lever a buyer actually holds for each one.
| Driver | Why it moves cost | How the buyer controls it |
|---|---|---|
| Wire count and termination count | Each wire end is cut, stripped, terminated, inserted, inspected and tested | Count ends on the wire list; remove spare or unused circuits where engineering allows |
| Connector family and availability | Military circular connectors and contacts are expensive per piece and some part numbers carry long factory lead times | Name approved alternates, check availability before release, and buy long lead connectors early |
| Crimp versus solder terminations | Solder joints take more labor and inspection per joint than crimps made with qualified tools | Prefer crimp contacts where the design allows; cite J-STD-001 only where solder exists |
| Workmanship class and space addendum | Class 3 and space requirements add inspection points, tighter acceptance and fewer qualified shops | Assign the class per harness; reserve the addendum for flight hardware |
| NASA-STD-8739.4 workmanship | Adds NASA training and process requirements that narrow the shop pool | Flow it down only where the contract imposes it, and say so plainly |
| Potting and backshells | Potting adds material, mixing, cure time and inspection; backshells add parts and torque steps | Pot only where the design needs it; standardize backshell part numbers |
| Electrical test | Hipot and insulation resistance need test programs, adapters and recorded data | State voltages, dwell, limits and test points in one test specification |
| Documentation and FAI | An AS9102 first article and serialized data take inspection and quality hours | Require full FAI where it is needed, and accept a delta FAI after small changes |
| Operator certification | Certified operators and inspectors cost the shop training time and renewal | Name the credential required, not a broader one than the contract needs |
| Counterfeit-avoidance sourcing | Authorized sources and traceability can cost more and take longer than open market stock | Flow down DFARS 252.246-7008 where it applies and plan for authorized lead times |
| Quantity and kitting | Form boards, test adapters and setup are spread over the lot | Quote two or three quantities; decide who kits connectors |
| Build to print versus design support | Creating drawings and wire lists from a schematic is engineering time | Send a complete package, or ask for design support as a separate line |
Wire count and termination count
Termination count is the closest thing a harness has to a cost unit. Every wire end is cut to length, stripped, terminated, inserted into the right cavity, inspected and tested, so a harness with 200 ends takes roughly twice the termination labor of one with 100.
Wire count also drives routing time on the form board, the number of breakouts and labels, and the size of the test program. Shielded and jacketed multi-conductor cable adds shield terminations, which take longer than a plain crimp and are inspected separately. Twisted pairs, controlled lengths and tight bend radius requirements slow the build further.
Before you send the request, count ends on the wire list and check for circuits nobody uses. Spare wires routed to every connector look cheap on a schematic and cost real labor and test time on every unit. Ask engineering whether spares can be dropped or terminated at one end only.
Connectors: family, availability and lead time
Connectors are often the largest material line and the item most likely to set the schedule. A MIL-DTL-38999 circular connector with its contacts and backshell can cost more than all the wire in a small harness.
MIL-DTL-38999 covers four series with different coupling styles, and each part number fixes shell size, finish, insert arrangement, polarization and contact type. That precision is the point, but it also means a given part number may be in stock at a distributor, or may need a factory build. Factory lead times for military circular connectors vary widely by part number and manufacturer, so check the specific part numbers on your drawing with authorized distributors before you commit to a need date. We do not quote connector lead times because they change by part number and by week.
Three habits keep connector cost and schedule under control:
- Name alternates up front. If engineering accepts more than one manufacturer for a military part number, say so on the parts list. A single named source removes any chance to choose the one with stock.
- Buy long lead parts early. A separate early purchase for connectors and contacts can protect the build date while drawings finish.
- Standardize. Using the same shell finish, contact size and backshell across a program raises volume per part number and lowers the chance of one odd connector holding the job.
Other families, such as rectangular, microminiature and filtered connectors, follow the same logic. Our wire harness sourcing page covers how to specify them.
Counterfeit avoidance and authorized sourcing
Buying connectors and contacts only from the manufacturer or its authorized distributors can cost more and take longer than open market stock, and on defense work it is often required. Price the job on authorized sources from the start so quotes are comparable.
DFARS 252.246-7008, Sources of Electronic Parts, sets the order of sources for covered defense work: the original manufacturer, authorized aftermarket manufacturers or their authorized suppliers first, then contractor-approved suppliers for parts out of production and out of stock, and other sources only with written notice to the contracting officer and contractor-run inspection, testing and authentication. That last path adds test cost and time. Whether connectors and contacts count as electronic parts on your program is a question for your contracts team, and many buyers apply the same sourcing rule to them either way.
Traceability costs a little paperwork on every lot: certificates of conformance from the distributor, lot or date codes recorded against harness serial numbers, and wire certificates tied to reel identification. Our counterfeit parts avoidance guide covers the standards behind this, and our material certs and traceability page shows what a complete trail looks like.
Crimp versus solder terminations
Crimp contacts made with the tool and positioner the contact manufacturer specifies are usually faster to make and inspect than solder terminations. Solder cups, splices and small boards in a harness add labor, a second workmanship standard and more inspection.
A qualified crimp is controlled through the tool: calibrated tooling, the correct positioner and pull tests on samples made with the same tool, contact and wire. Once that is proven, each crimp is quick. A solder joint depends more on the operator, needs cleaning and inspection of each joint, and brings J-STD-001 and its own class onto the order. Mixed designs carry both sets of requirements. If engineering can use crimp removable contacts instead of solder cups, the labor and inspection per termination usually drop.
Workmanship class, the space addendum and NASA-STD-8739.4
The workmanship standard and class you name change how much inspection each harness gets and how many shops can bid. Class 3 with a space addendum costs more than Class 2 because it is meant to, so assign it where the hardware needs it.
IPC/WHMA-A-620 sets acceptance criteria by product class, and the space and military addendum adds requirements on top of Class 3 for hardware that must survive launch and space environments. NASA-STD-8739.4, the NASA workmanship standard for crimping, interconnecting cables, harnesses and wiring, is mandatory where NASA imposes it, and NASA-STD-8739.6 adds training requirements. Each step up adds inspection points, tighter acceptance criteria, more documentation and, for NASA work, specific operator and inspector training, which limits the shops that can quote.
The cost mistake we see most is a single class applied to everything on a program. Ground test cables, lab cables and some GSE cables may be fine at a lower class or without the space addendum, while flight harnesses need the full set. Ask engineering to assign the class and addendum per drawing. The harness sourcing page explains the classes and revisions.
Potting, backshells and protective covering
Potting, backshells and overbraid or sleeving are added operations with their own material, labor and wait time. They are often required, but each one should be on the drawing for a reason.
- Potting and encapsulation: mixing, degassing, filling, cure time and inspection, often with a cure schedule that holds the part in the shop. For NASA electronics, NASA-STD-8739.1 covers staking, conformal coating, bonding and encapsulation. Potting also makes rework close to impossible, so a test failure after potting can mean scrapping the assembly.
- Backshells and strain relief: extra parts to buy, torque values to apply and record, and shield terminations to the backshell where the design calls for them.
- Protective covering: overbraid, convoluted tubing, heat shrink boots and lacing add material and hand labor along the whole length.
Ask the shop to quote these as separate lines. It shows what each feature costs and helps engineering decide where it is truly needed.
Electrical test
Electrical test is a fixed cost to set up and a small cost per unit after that. Continuity on every unit is normal; dielectric withstanding voltage (hipot) and insulation resistance add test time, adapters and recorded data.
Automated harness testers need a program built from the wire list and adapters that mate with your connectors. That setup is a one-time cost per part number and revision, which is why test adds more per unit on a lot of two than on a lot of fifty. The per-unit cost rises with point count, test voltage, dwell time and the number of conductor groups tested against each other and against shields and shells.
Give the shop one test specification with voltages, dwell, limits and test points, or reference the document that contains them. Vague callouts produce quotes that either pad for the worst case or leave tests out. Ask for data by serial number. Environmental testing of the harness, if your program needs it, is a lab job; our environmental test lab cost guide covers how that is priced.
Documentation, first article and operator certification
Paperwork is real labor on a harness, and the first unit carries most of it. An AS9102 first article report records every design characteristic plus the material and process records, which on a harness includes connectors, contacts, wire specifications and test results.
Serialized test data, certificates for each purchased part, travelers and the certificate of conformance add time on every unit. Customer-specific forms and source inspection add more. Match the paperwork to what the contract requires: a full first article for a new source or a new revision, and a partial one after a small change. Our first article inspection guide explains the forms.
Operator and inspector certification is part of the shop's cost of doing the work. IPC certifications are time limited and have to be renewed, and NASA workmanship training is a separate requirement. A shop that holds the specific credential your contract names may quote higher than one that does not, but the cheaper quote is not comparable if it cannot meet the requirement.
Quantity, kitting, and build to print versus design support
Quantity spreads the one-time costs: form board, test program and adapters, work instructions, first article and the first round of crimp samples. Quoting two or three quantities shows exactly what those costs are adding to each unit.
Kitting matters too. If you supply connectors or wire from your own stock, say so, along with who holds the certificates and what happens if a kitted part is short or wrong. Customer-supplied parts can save money when you already own them, but they move the counterfeit and traceability responsibility back to you for those parts.
Build to print from a complete drawing, wire list and parts list is the cheapest way to buy a harness. If the shop has to create the harness drawing, wire list or form board layout from a schematic, that is engineering work, and it should be quoted as a separate line. SAE AS50881, Wiring, Aerospace Vehicle, which the DoD adopted in place of MIL-W-5088L, covers wiring design and installation and is often cited when a shop provides design support.
Public numbers worth knowing
A few government figures explain recent harness pricing, though none of them is a harness price or a shop rate.
- Copper wire and cable: on the Producer Price Index published by the Bureau of Labor Statistics and charted by the St. Louis Fed (FRED), the commodity index for copper wire and cable rose about 27 percent between August 2025 and August 2026.
- Connectors: the BLS industry index for electronic connector manufacturing rose about 7 percent over the same months, and the index for other communication and energy wire manufacturing rose about 5 percent. Recent months are preliminary and can be revised.
- Assembler pay: BLS reports a median annual wage of $45,850 in May 2025 for electrical, electronic and electromechanical assemblers. A shop's billed rate is higher because it also covers equipment, test systems, training, quality staff, facilities and profit.
We did not find a neutral published survey of aerospace harness prices or labor rates. Compare complete quotes on the same package instead of a per-termination or hourly figure.
Ways to lower harness cost without lowering quality
- Send a complete package: drawing at revision, wire list, parts list with alternates, and one test specification. Our aerospace RFQ checklist covers the rest.
- Assign workmanship class and addendum per drawing, not per program.
- Check connector availability before release and buy long lead parts early.
- Remove unused circuits and prefer crimp over solder where engineering agrees.
- Pot, overbraid and boot only where the design needs it.
- Quote two or three quantities and consider scheduled releases.
- Ask for material, labor, test, documentation and engineering as separate lines.
For how the harness fits a larger program, see our spacecraft and satellites reference and defense systems reference. To check harnesses when they arrive, see receiving inspection.
Get a harness quote built on your real package
Send your drawing, wire list and parts list through the wire harness quote form. Connector part numbers and the workmanship class decide which shops can quote and how long the build takes, so including them first saves a round of questions. A person replies within 1 business day, and rush requests are prioritized. We do not build harnesses ourselves. We match the job to shops that build to your standard and class, flow down your workmanship, sourcing, test and documentation requirements, and give you one quote, one lead time, one point of contact and one purchase order. Every order ships with a certificate of conformance. We do not promise a price or a date before we see the package. Harness drawings on defense and launch programs are often controlled; see our confidentiality page and controlled programs before sending them.
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Part, quantity and date are enough to start. Drawings and the mutual NDA follow by reply, and controlled programs never send technical data through this site.
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Questions
How much does an aerospace wire harness cost?
There is no published price that fits aerospace harnesses in general. The price is set by termination count, connector part numbers and their availability, the workmanship class and any space addendum, potting and backshells, the electrical tests, the first article and the quantity. Two harnesses with similar wire counts can differ several times over. Send the same complete package to qualified shops and compare quotes line by line.
Why are MIL-DTL-38999 connectors driving my harness price and schedule?
Each MIL-DTL-38999 part number fixes series, shell size, finish, insert arrangement and contact type, so stock of the exact part may be thin and a factory build can be needed. They are also among the most expensive items in a small harness. Naming approved alternate manufacturers, checking availability before release and buying connectors early are the usual ways to protect both cost and schedule.
Does Class 3 with the space addendum cost more than Class 2?
Yes. Class 3 and the IPC/WHMA-A-620 space and military addendum add inspection points, tighter acceptance criteria and documentation, and fewer shops are qualified to build to them. NASA-STD-8739.4 adds NASA training requirements where it is imposed. Assign the class and addendum per drawing so ground test and lab cables are not built to flight requirements they do not need.
Why is my first harness so much more expensive than later units?
The first unit carries the one-time work: form board, test program and adapters, work instructions, crimp pull samples and the AS9102 first article report. Later units in the same revision only carry build, inspection and test. Quoting two or three quantities shows how much of the price is setup, and a partial first article after a small drawing change is usually cheaper than a full one.
Do DFARS counterfeit rules raise harness cost?
They can. DFARS 252.246-7008 puts the original manufacturer and its authorized suppliers first, and open market sources require written notice and contractor-run inspection, testing and authentication. Authorized parts may cost more or take longer than broker stock, and traceability adds paperwork on every lot. Price the job on authorized sources from the start so quotes compare fairly.
Is it cheaper if I supply the connectors myself?
It can be, when you already own certified stock. You avoid the shop's purchasing effort on those parts, but you take on responsibility for their authenticity, certificates and availability. State on the order which parts are customer supplied, who holds the certificates, and what happens if a kitted part is short or wrong, so the shop does not price that risk into the quote.
Related
Sources
- U.S. Bureau of Labor Statistics, Occupational Outlook Handbook: Assemblers and Fabricators (pay, May 2025)
- FRED, St. Louis Fed: PPI by Commodity, Copper Wire and Cable (WPU10260314)
- FRED, St. Louis Fed: PPI by Industry, Electronic Connector Manufacturing (PCU334417334417)
- FRED, St. Louis Fed: PPI by Industry, Other Communication and Energy Wire Manufacturing (PCU335929335929)
- Acquisition.gov, DFARS 252.246-7008 Sources of Electronic Parts
- NASA Technical Standards System, NASA-STD-8739.4 Workmanship Standard for Crimping, Interconnecting Cables, Harnesses, and Wiring
- NASA Technical Standards System, NASA-STD-8739.1 Workmanship Standard for Polymeric Application on Electronic Assemblies (Version B, Change 2)
- ANSI Blog, IPC/WHMA-A-620F-2025 Requirements and Acceptance for Cable and Wire Harness Assemblies
- Glenair, MIL-DTL-38999 Series I, II, III and IV connectors
- SAE International, AS9102C Aerospace First Article Inspection Requirement
- SAE Mobilus, AS50881 Wiring, Aerospace Vehicle
- EverySpec, DoD adoption notice for SAE AS50881 superseding MIL-W-5088L (30 September 1998)
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