MIL-PRF-680 Solvent: Types, Uses, and MRO Buying Guide
MIL-PRF-680 solvent is a cleaning and degreasing solvent specified for maintenance work on parts and surfaces. For an MRO buyer, the critical distinction is the required type: a request for MIL-PRF-680 alone does not identify whether Type I or Type II is needed, or which product and package to supply.
Key Takeaways
- Specify the MIL-PRF-680 type, not just the specification designation.
- Product descriptions identify SOLVENT-680-TYPE1 as a degreasing solvent and SOLVENT-680-TYPE2 as a cleaning solvent.
- The listed Type I product is described as fast-drying; the listed Type II product is described as having a high flash point.
- Include the part number, quantity, container requirement, and documentation needs in a quote request.
What Does MIL-PRF-680 Identify?
MIL-PRF-680 is a specification designation used to identify a category of solvents for cleaning and degreasing. In a purchase request, it helps define the required product, but it is not a complete ordering description. The type, manufacturer’s part number, and packaging still matter.
This distinction is useful when an engineer writes “MIL-PRF-680 solvent” on a materials list and a buyer must turn that description into an order. The buyer should determine whether the maintenance requirement calls for Type I or Type II before requesting a particular product. A supplier should not have to infer the type from a broad instruction such as “solvent for aircraft parts.”
It also helps to separate a specification claim from a product identifier. “MIL-PRF-680 Type II” states the requested specification and type; “SOLVENT-680-TYPE2” is the part number shown for a particular Eurochem S.A. product. Keeping both in the request makes it easier to compare a quotation against the maintenance team’s requirement.
Type I vs. Type II: What the Listed Products Say
CraftJetAero lists Eurochem S.A. products under both types. The descriptions provide practical points of comparison, but they do not replace a current technical data sheet or define every distinction between the types. The table below summarizes only the attributes stated for these listed products.
| Purchasing detail | Listed Type I product | Listed Type II product |
|---|---|---|
| Part number | SOLVENT-680-TYPE1 | SOLVENT-680-TYPE2 |
| Product description | Degreasing solvent meeting MIL-PRF-680 specifications | Cleaning solvent described as compliant with MIL-PRF-680 Type II |
| Stated characteristics | Low odor, fast-drying, and less than 1% aromatics | Low odor, high flash point, and less than 1% aromatics |
| Stated surfaces or work | Degreasing painted and unpainted metal surfaces and machine parts | Cleaning painted and unpainted metal surfaces in aircraft and machinery maintenance |
| Listed container | 1-liter container | 1-liter container |
The SOLVENT-680-TYPE1 product page describes a fast-drying degreasing solvent. The SOLVENT-680-TYPE2 product page describes a cleaning solvent with a high flash point. Those are product-specific descriptions, not a basis for substituting one type for the other.
Where Does This Solvent Fit in Aircraft Maintenance?
Cleaning and degreasing are distinct tasks in a maintenance sequence. A technician may need to remove oil or grease from a machine part, or clean a painted or unpainted metal surface before the next documented operation. The listed products are described for those kinds of surfaces, but the required cleaning method depends on the component and the work being performed.
For example, consider a work order that calls for cleaning a painted metal access panel and separately calls for degreasing a removed metal machine part. The descriptions for the listed Type I and Type II products mention painted metal surfaces, while the Type I description also expressly mentions machine parts degreasing. Those descriptions can help a buyer identify products to review; they do not, by themselves, determine which solvent the work order permits for either task.
Solvent cleaning should not be confused with paint removal or with selecting a coating-system thinner. Each has a different purpose. Buyers comparing cleaning materials can use the aircraft cleaning solvent selection guide to organize questions about the surface, contamination, and required cleaning operation.
Before use, confirm the required type and product against the aircraft maintenance documentation and any applicable engineering approval; follow the manufacturer’s current data sheet for handling and surface compatibility. A statement that a solvent meets a specification does not, on its own, establish approval for every component or procedure.
How to Write a Useful Purchase Request
A complete request lets procurement, engineering, and the supplier discuss the same material. Start with the requirement as written in the work package, then identify the product and the documents needed for receiving or technical review. If the work package gives only the specification designation, ask the responsible technical team to resolve the type rather than choosing one from a catalog description.
- Specification and type: State “MIL-PRF-680 Type I” or “MIL-PRF-680 Type II” when the requirement identifies one.
- Part number and manufacturer: Include these when a specific product is required or being evaluated.
- Quantity and package: State the number of containers and the required container size; the listed products are described in 1-liter containers.
- Documentation: Identify any data sheet, safety data sheet, or receiving documents your organization needs to review.
- Use context: Briefly describe the component and cleaning task so that a discrepancy can be flagged before purchase.
For example: “Please quote Eurochem S.A. SOLVENT-680-TYPE2, MIL-PRF-680 Type II, six 1-liter containers, for review against an aircraft maintenance cleaning requirement. Please include the available product data sheet and safety data sheet.” This identifies the requested item without suggesting that the supplier, rather than the maintenance organization, decides its suitability.
If a team uses multiple identification systems, include its internal material code alongside the manufacturer’s part number. An internal code can help route a request, but the manufacturer’s identifier and required type should remain visible so that purchasing does not unintentionally combine unlike materials under a generic “solvent” description.
Checking a Quote Against the Requirement
When a quotation arrives, compare its product name, part number, manufacturer, type, and package with the original request. Similar names can conceal an important difference: SOLVENT-680-TYPE1 and SOLVENT-680-TYPE2 share most of a part-number stem but identify different listed types. A quote for one should not be treated as an exact match to a request for the other.
Keep the technical question separate from the commercial one. Procurement can verify whether the offered line item matches the requested identifier and quantity. The maintenance or engineering team can review whether its documentation permits that material for the intended task. This division makes discrepancies easier to resolve and gives receiving personnel a clearer basis for checking the delivered item against the order.
Sourcing from CraftJetAero
Buyers can request a quote from CraftJetAero by part number. Include the required MIL-PRF-680 type, container size, quantity, and any documentation request so the inquiry identifies the material your team needs to evaluate.
Frequently Asked Questions
What is MIL-PRF-680 solvent used for?
It is specified for cleaning and degreasing work. The listed Eurochem S.A. products are described for painted and unpainted metal surfaces, with the Type I product also described for machine parts degreasing.
Are MIL-PRF-680 Type I and Type II interchangeable?
Do not assume they are. They are identified as different types, so a request for one type should be checked against the offered product rather than filled with the other solely because both reference MIL-PRF-680.
What is the difference between the listed Type I and Type II solvents?
The listed Type I product is described as a fast-drying degreasing solvent. The listed Type II product is described as a cleaning solvent with a high flash point; both descriptions state low odor and less than 1% aromatics.
Is SOLVENT-680-TYPE2 the same as the specification name?
No. SOLVENT-680-TYPE2 is the listed Eurochem S.A. part number; MIL-PRF-680 Type II is the specification and type referenced in its product description. Include both when they are relevant to the purchase request.
What should an MRO buyer include when requesting a quote?
Provide the required type, manufacturer and part number if specified, quantity, container requirement, and requested documents. Add a brief description of the intended cleaning task if it will help identify a mismatch.