Greno Industries

Military CNC Machining


Military CNC Machining for MIL-SPEC Parts

ITAR Registered | AS9100 and ISO 9001 Certified

‍Greno Industries provides precision military CNC machining services for MIL-SPEC components and is a trusted manufacturing partner for the U.S. military, defense contractors, and OEMs supporting critical defense programs.

‍Our flagship product, the GIS Valve, is installed on more than 400 U.S. Navy ships and demonstrates Greno’s ability to manufacture highly engineered components for extreme military environments. F

‍With our advanced CNC milling, large-diameter turning, deep-hole gun drilling, welding, industrial assembly, and end-to-end manufacturing support, Greno is equipped to support both new and legacy military programs. ‍ ‍

The GIS Valve: Military-Grade Engineering

One of the strongest demonstrations of Greno’s military machining capability is the GIS Valve, a high‑performance, high‑pressure steam safety valve originally developed for the U.S. Navy.

The GIS Valve is engineered to withstand:

  • Pressures up to 3,000 PSI

  • Temperatures exceeding 1,100°F

  • Continuous high-cycle operation

  • Corrosive naval environments

  • Severe vibration and shock conditions

Features such as remote operation, modular maintenance design, and precision-machined sealing surfaces demonstrate Greno’s ability to manufacture military-grade components requiring the highest levels of reliability and performance.

Today, the same engineering discipline, machining precision, and quality assurance processes used in GIS Valve manufacturing are applied to every MIL-SPEC component produced at Greno Industries.

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Why Military Contractors Choose Greno Industries

Greno Industries is certified under MIL-Q-9858 for military parts quality and equipped to bid and supply parts through the TACOM procurement network, serving key arsenals across the country, including Warren, MI, and Watervliet, NY.

Certified Quality for Mission-Critical Components

Our certifications and compliance standards include:

  • AS9100:2016

  • ISO 9001:2015

  • NIST 800-171

  • DFARS compliance

These systems ensure rigorous process control, documentation, inspection, and traceability throughout production.

Large-Format and Complex CNC Machining

Greno supports both small precision components and large heavy-machined assemblies through capabilities including:

  • Large-diameter CNC turning

  • Multi-axis CNC milling

  • Deep-hole gun drilling

  • Precision boring and threading

  • Alloy‑specific industrial welding and fabrication

This allows Greno Industries to produce both small precision components and large, heavy, parts for platforms like military vehicles.

Expertise in High-Performance Alloys

We routinely machine:

  • Inconel

  • Titanium

  • Stainless steels

  • Alloy steels

  • High-strength nickel alloys

These materials are commonly used in defense, naval, aerospace, and high-temperature military applications.

Fast Turnaround and Material Availability

Greno maintains a substantial in-house raw material inventory and offers rapid-response manufacturing for urgent defense and military requirements.

End-to-End Manufacturing Support

Beyond machining, Greno Industries provides:

  • Industrial assembly services

  • Kitting and packaging

  • Machined and sourced component integration

  • Supply chain coordination

  • Field-ready delivery solutions

This end-to-end manufacturing approach simplifies procurement and improves supply chain efficiency for defense customers.

MIL-SPEC Machining

MIL-SPEC machining requires strict compliance with Department of Defense (DoD) standards governing component performance, durability, and traceability. Military-grade components must meet exact specifications related to:

  • Dimensional tolerances and geometric accuracy

  • Material chemistry and mechanical properties

  • Heat treatment and metallurgical integrity

  • Surface finish, coatings, and corrosion resistance

  • Environmental durability under shock, vibration, humidity, salt fog, and temperature extremes

  • Serialization, inspection documentation, and full traceability

Standards such as MIL‑STD‑810, MIL‑STD‑461, and various MIL‑DTL specifications define how parts must perform in real‑world military environments. Greno’s quality management system ensures that every MIL-SPEC part is produced, inspected, and documented to these requirements.

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Tactical and Armored Ground Vehicles

High mobility multipurpose wheeled vehicles (HMMWVs), joint light tactical vehicles (JLTVs), and mine-resistant ambush-protected vehicles (MRAPs) are just some of the platforms we can support. The components we can machine include:

  • Suspension and steering hardware

  • Drivetrain and power‑transfer components

  • Brake system housings and brackets

  • Structural mounting hardware

  • High‑strength fasteners and studs

These mission-critical components require exceptional durability, repeatability, and material integrity to perform reliably in combat and field operations. 

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Artillery, Armament and Fire‑Control Systems

Greno’s large‑diameter turning and gun drilling services support components such as:

  • Breech and recoil system components

  • Barrel support hardware

  • Precision alignment and mounting components

  • High‑pressure housings and rings

Deep‑hole drilling, one of Greno’s signature capabilities, enables the production of long, straight, high‑accuracy bores essential for weapon‑system performance. 

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Naval and Marine Support Vehicles

Naval and marine defense systems require components capable of withstanding continuous exposure to corrosive saltwater environments, vibration, and extreme temperatures. Greno’s expertise machining stainless steel, Inconel, nickel alloys, and other corrosion-resistant materials supports long-term reliability in demanding naval applications.

Examples of naval and marine components we manufacture include:

  • Pump housings

  • Valve bodies

  • Shaft components

  • Structural brackets

  • High‑strength corrosion‑resistant fasteners

  • High-pressure fluid system components

As a trusted supplier to U.S. Navy programs, Greno understands the precision and reliability required for mission-critical marine systems.

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Ask Greno for Military-Grade Machining

Whether it’s supporting TACOM procurement programs, supplying military arsenals in Warren, Michigan and Watervliet, New York, or partnering with Tier-One defense contractors, Greno Industries has built a reputation for precision, reliability, and long-term manufacturing support.

As military systems continue evolving through electrification, advanced materials, and next-generation defense technologies, Greno continues investing in advanced CNC machining, cybersecurity compliance, quality systems, and manufacturing technology to support the future of American defense manufacturing.

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