United Resins's Mil-Spec Epoxy Resins and Products

National Stock Number (NSN), also known as NATO Stock Number, is a 13-digit identifying number used by the U.S. government and NATO to standardize specific item names, descriptions, and uses for supply items that are procured consistently throughout Federal and international supply systems. Products assigned an NSN meet specific criteria, including military specifications (Mil-Spec), and are approved for supply chain integration. An NSN assignment allows engineers, purchasing agents, and maintenance personnel to identify the correct supply item and reduces confusion and errors, enhances supply delivery, and supports cost effective inventory management.

NSNs are assigned through a strict process, validating that the product meets quality, reliability, and documentation requirements. NSNs are a universal identifier, providing a reliable reference for sourcing, tracking, ordering, stocking, and inventory control.  Beyond military and defense, NSNs are used in Federal contracts and in commercial purchasing documents for items sold to governments. NSNs reduce miscommunication to facilitate ordering of parts and supply items across borders.

An NSN 13-digit code is composed of two main parts:

• First 4 digits: The Federal Supply Classification (FSC) or NATO Supply Class (NSC), which groups similar items together.
• Next 9 digits (National Item Identification Number or NIIN):
  • First 2 digits: The National Codification Bureau (NCB) code, indicating the country or organization that first cataloged the item (e.g., 00 or 01 for the United States).
  • Last 7 digits:  A serial number unique to the item within that country’s system.

1. E-Cast F-28 with Quickbond Liquid

NSN: 8040-01-034-0401
Format: 30 mL Syringe (other sizes available)
This two-part, fast-setting epoxy bonds a wide range of surfaces, including ceramics, metal, wood, glass, fiberglass, and concrete. It is unfilled, reaches handling strength in 5 minutes, and cures fully within an hour. The black or clear resin offers high chemical resistance and water immersion performance.

• Tensile Strength: 3,500 psi
• Operating Temp: -40°F to 250°F
• Hardness: Shore D 85

2. Metalbond-Modified 187B System

NSN: 8040-00-753-4800
Format: 1.5 oz Kit
A non-sagging epoxy paste used extensively in the automotive and defense sectors. This system replaces solder in metal repair applications and meets MIL-SPEC MMM-A-187B. It features excellent adhesion and cosmetic quality for exposed applications.

• Compressive Strength: 10,600 psi
• Flexural Strength: 6,500 psi
• Pot Life: 150 minutes

3. Bond-Gap Adhesive with 155 Hardener

NSN: 8040-00-123-6954
Format: Pint Kit
An aluminum-filled adhesive with thixotropic behavior, ideal for structural metal bonding and filling applications. This system offers a long work life, good dimensional stability, and performance at elevated temperatures.

• Lap Shear Strength: 2,100 psi
• Full Cure: 7 days at 72°F or 30 minutes at 200°F
• Dielectric Strength: 430 V/mil

4. Optik-Bond CCA with 929 Hardener

NSN: 8040-00-145-0043
Format: Varies
Used for optical connectors, lenses, and other precision assemblies, this low-viscosity epoxy system is well suited for potting and sealing. It bonds aluminum, ceramics, and glass, while offering extended work time.

• Tensile Strength: 5,500 psi
• Glass Transition Temp: 140°F
• Volume Resistivity: 8.0 x 10¹⁵ ohm-cm

5. E-Cast Sur-Grip with 282 Hardener

NSN: 8040-00-148-7183
Format: Quart Kit – Black
This medium-viscosity system is ideal for marine and electronics applications where potting, encapsulation, and vibration resistance are needed. It cures overnight with low shrinkage and supports high mechanical loads.

• Compressive Strength: 18,500 psi
• Flexural Strength: 20,000 psi
• Pot Life: 4.5 hours

United Resin Corp’s NSN assigned products are used across a variety of sectors where performance, reliability, and traceability are essential. These adhesives and epoxies are engineered to meet the operational demands of defense, aerospace, marine, and industrial environments.

Common uses include:

• Structural bonding of metals, ceramics, and composites
• Potting and encapsulation of sensitive electronics and optical components
• Repair and sealing of equipment exposed to water, chemicals, and high temperatures
• Assembly of sonar systems, navigation units, and sensor housings
• Gap filling and surface restoration in vehicles and field equipment

These materials are selected for their strong mechanical properties, chemical resistance, and electrical insulation performance. To request specifications, SDS sheets, or discuss procurement needs, contact us today.