RADCOLUBE 500M is a military-grade, synthetic polyalphaolefin (PAO) dielectric heat transfer fluid manufactured in strict accordance with specification MIL-PRF-87252G (superseding MIL-C-87252). Engineered specifically for liquid cooling systems in advanced military aircraft, missile guidance assemblies, airborne radar, and high-density avionics, Radcolube 500M provides superior heat transfer capabilities combined with exceptional dielectric insulating properties. Formulated to be hydrolytically stable and chemically inert, this non-aqueous PAO coolant prevents electrical arcing and dielectric breakdown while protecting high-power transmitters, Active Electronically Scanned Array (AESA) radars, and electronic warfare (EW) suites across extreme environmental temperature swings (-54°C to 135°C+).

Technical Specifications & Chemical Properties

• Manufacturer / Brand: Radco Industries, Inc. / RADCOLUBE®
• Part Number / Series: RADCOLUBE® 500M
• Military Specification: MIL-PRF-87252G (Qualified Product List / QPL Listed)
• NATO Code / Identifier: S-1748
• Fluid Chemistry: Synthetic Polyalphaolefin (PAO) Hydrocarbon Base
• Dielectric Strength: High breakdown voltage rating (> 35 kV), ensuring complete electrical insulation in high-voltage avionics loops
• Kinematic Viscosity:
  • At 40°C (104°F): ~2.0 cSt (optimized for low pump drag and rapid heat transfer)
  • At -54°C (-65°F): ≤ 2,000 cSt (ensures low-resistance cold startup in sub-zero high-altitude environments)
• Flash Point (Pensky-Martens Closed Cup): ≥ 160°C (320°F) for maximum operational safety in enclosed electronics bays
• Hydrolytic & Oxidation Stability: Exceptional resistance to moisture absorption, preventing acid buildup, sludge formation, and dielectric degradation
• Operating Temperature Range: -65°F to 275°F+ (-54°C to 135°C+) continuous thermal management service
• Appearance: Clear, water-white fluid free of sediment and suspended matter
• Material Compatibility: Compatible with aerospace aluminum cold plates, copper alloys, stainless steel lines, fluorosilicone, and Viton (FKM) elastomeric seals

Approved Specifications & Military Conformance:

Radcolube 500M holds official Quality Products List (QPL) status under defense and NATO military standards:

• MIL-PRF-87252G QPL Certified: Qualified under military performance standards for synthetic hydrocarbon dielectric coolant fluids.
• NATO S-1748 Specification: Standardized across allied forces as an approved airborne dielectric coolant for high-density avionics loops.
• Ultra-Clean Particulate Quality: Packaged under cleanroom conditions to satisfy rigid particle count limits for micro-channel cold plate and servovalve protection.

Key Features & Performance Benefits

• MIL-PRF-87252G Compliance: Fully certified PAO coolant designed to meet the exact thermophysical and electrical requirements of military airframe OEMs.
• High Dielectric Breakdown Voltage: Safely isolates high-voltage avionics and radar transmitters, preventing short-circuiting, electrical arcing, and stray current leakage.
• Hydrolytic & Chemical Purity: Formulated without free water or reactive halogens to prevent chemical attack, pitting, and corrosion on electronic substrates.
• Sub-Zero Fluidity & Rapid Heat Dissipation: Maintains low fluid viscosity at -54°C, ensuring immediate thermal protection for active radar modules upon system power-up.

Typical Applications

• Airborne AESA Radar Systems: Primary dielectric coolant for Active Electronically Scanned Array (AESA) radar antennas, pods, and transmitters on fighter aircraft.
• Avionics & Directed Energy Cooling: Circulates through liquid cold plates in high-density computing racks, EW (Electronic Warfare) suites, and laser systems.
• Missile Guidance & Naval Electronics: Used in shipboard radar installations, missile launcher guidance cooling loops, and military ground-based tracking stations.

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns and damage claims must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization - RMA). Returns without prior notice or written authorization will not be accepted. We strongly recommend inspecting the product upon delivery; many products require special storage conditions for which we are not responsible once they arrive to the client's facility. Please review the product's SDS for proper storage and handling.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.

At Aircraft Shop Supply, we are committed to shipping the highest quality and freshest product possible. To ensure efficient stock rotation and meet aviation industry standards, our inventory management is governed by the following policy:

1. Scope of Application
All Sales Channels: This policy applies to all orders processed by Aircraft Shop Supply, including but not limited to: website purchases, direct email orders, formal Purchase Orders (POs), phone orders, and contract agreements.

2. Inventory Management (FIFO)
All products with an expiration date are managed and shipped on a strict "First In – First Out" (FIFO) basis.

3. Minimum Shipping Margin
Standard Guarantee: We will not ship any products with fewer than 30 days of use remaining (days before expiration), unless previously coordinated and agreed upon with the customer.

No Automatic Guarantees: Outside of this 30-day minimum margin, Aircraft Shop Supply does not make any automatic guarantee as to the specific length of time remaining on any shelf-life item for standard orders.

4. Special Customer Requirements
We understand that certain projects, maintenance schedules, or regulatory standards require strict specifications. If your order has specific shelf-life requirements, please proceed as follows:

How to Request: If you require a specific Date of Manufacture (DOM), Date of Expiration (DOE), or a specific minimum shelf-life percentage (%), you must clearly state this requirement:

In the Comments/Notes section when placing an online order.

Explicitly written on your Purchase Order (PO) or quote request email for offline orders.

Validation Process: Once your requirement is received:

We will ship your order if the available stock matches your specifications.

If we do not have the exact batch, we will contact you prior to shipping with the shelf-life percentage (%) or dates we have available for your acceptance.

5. Limitation of Liability and Validity of Information
To ensure transparency and manage expectations, the following terms and conditions apply:

Time-Limited Validity: Any information provided by our team regarding the remaining shelf-life percentage (%) is valid only at the exact time the inquiry is made. Due to high inventory turnover, availability is subject to change without prior notice.

Informational Purposes Only: Shelf-life data provided by Aircraft Shop Supply is strictly for informational purposes and reflects the availability at the moment of inquiry. It does not constitute a batch reservation or a product warranty.

Supply Chain Liability Exclusion: Aircraft Shop Supply is not responsible for the time elapsed or any product expiration that occurs after the order has been prepared and packed. This includes, but is not limited to: the time between order placement, carrier transit times, intermediary storage, customs delays, and final delivery to the end user. It is the customer's responsibility to account for these logistical lead times within their planning.