Custom Fasteners Manufacturer

Greno Industries is a custom industrial fasteners manufacturer specializing in high-performance bolts, studs, nuts, and engineered fastening solutions for demanding applications. We manufacture precision fasteners for industries including power generation, aerospace, oil and gas, defense, and heavy equipment, where components must perform reliably under extreme heat, pressure, vibration, and corrosion. 

Custom fasteners are not consumer-grade commodity items. They’re engineered components that withstand heat, vibration, pressure, corrosion, and shock loads. Greno’s precision machining, large diameter turning, gun drilling, and alloy specific welding capabilities allow us to manufacture industrial fasteners that meet the requirements of original equipment manufacturers (OEMs) and maintenance, repair and overhaul field service organizations.

Why Choose Greno Industries for Custom Fasteners?

Greno Industries delivers engineered fastening solutions for critical applications where failure is not an option. Our combination of advanced machining capabilities, material expertise, and quality control processes makes us a trusted partner for OEMs and MRO providers across demanding industries.

Key advantages include:

• Large Diameter Fastener CapabilityMachining oversized studs, bolts, and custom fasteners that many shops cannot produce

• In-House Gun DrillingRare capability for deep-hole fasteners, coolant passages, and weight-reduction designs

• Experience with High-Temperature AlloysProven machining of Inconel, stainless steels, and alloy steels used in turbine and energy applications

• Precision Machining to Tight TolerancesCapable of achieving tolerances as tight as ±0.0001” for critical components

• Integrated Manufacturing Under One RoofTurning, milling, drilling, welding, and inspection performed in-house for better quality and shorter lead times

• Certified Quality SystemsAS9100 and ISO 9001 certified processes with full material traceability and documentation

• Support for OEM and Aftermarket ApplicationsFrom prototype development to outage-driven replacement parts and production runs

Engineered for Extreme Environments

Greno manufactures fasteners designed for extreme operating environments where failure is not an option, including:

• High-temperature turbine systems

• Combustion and exhaust environments

• High-pressure oil and gas applications

• Aerospace engine assemblies

• Military and defense platforms

The materials we machine include alloy steels, stainless steels, titanium, Inconel, and other high-performance metals that provide strength, corrosion resistance, and thermal stability.

Full Customization: From One-Offs to Production Runs

OEMs and MROs can’t risk using catalog fasteners that don’t fully meet application requirements. Greno fills that gap with Made in USA custom fastener manufacturing, including:

• Custom bolts (hex, heavy hex, socket, specialty geometries)

• Custom studs and double ended studs

• Custom nuts and lock nuts

• Threaded rods

• Precision machined fastening components

• Large diameter fasteners for heavy equipment and energy systems

• Fasteners with unique thread forms, coatings, or materials

At our Schenectady, New York manufacturing facility, we support prototype development, short run production, and full scale manufacturing for both OEMs and field service sites. 

Military and Aerospace Quality

Customers in industries like defense and aerospace need custom fasteners that are made with precision, reliability, and compliance with strict specifications. We have the certifications that are required for military and aerospace manufacturing, and Greno is a certified Woman Owned Small Business (WOSB) that is ITAR registered and AS9100:2016 and ISO9001:2015 certified.

• Greno manufactures fasteners for:

• Military vehicles and defense systems

• Aerospace engines and structural assemblies

• Government and military OEMs

• Critical infrastructure and energy systems

Ask Greno for high-performance fasteners that meet MIL SPEC, aerospace, and industry specific requirements. Our machining tolerances, material traceability, and inspection processes are designed to ensure that every component is ready for mission critical use.

Precision Machining for Tight Tolerance Fasteners

Industrial fasteners often require tolerances far tighter than standard hardware. While typical tolerances are ±0.005” (0.13mm), Greno’s CNC machining processes can achieve tolerances as tight as ±0.0001” (0.00254 mm), ensuring precise fit and performance in critical applications.

Greno’s machining capabilities include:

• Large diameter turning

• Gun drilling

• Multi axis CNC machining

• Thread cutting and thread rolling

• Surface finishing

• Alloy welding and hardfacing for wear resistant fasteners

Our in-house gun drilling capabilities—rare among fastener manufacturers—allow us to produce deep, straight, precision bores for specialized fastener designs used in energy, aerospace, and heavy equipment applications.

Materials Expertise for High Performance Fasteners

Custom fasteners must be made from materials that can withstand the specific environment where they’ll be used. Greno stocks a wide range of metals, including:

• Inconel 718 and other nickel alloys

• Stainless steels (300 series, 400 series, PH grades)

• Alloy steels (4140, 4340, 17 4, 15 5)

• Titanium for aerospace applications

• Hardened steels for high load environments

• Corrosion resistant materials for offshore and chemical processing

These materials are selected based on temperature resistance, load requirements, corrosion resistance, and fatigue performance to meet demanding application conditions.

Ask us which industrial fastener material is right for your application’s temperature, load, corrosion, and fatigue requirements.

Industrial Fasteners for Critical Applications

As a custom fastener manufacturer, Greno makes products for industries where failure is not an option.

Aerospace Fasteners

Aerospace fasteners must withstand extreme temperatures, vibration, and dynamic loads. Precision and reliability are especially critical in-flight critical components. National aerospace standards (NAS) such as NAS1149 may apply.

Greno manufactures:

• Engine fasteners

• Structural bolts

• High temperature alloy fasteners

• Precision studs and nuts

• Custom fastening components for aerospace assemblies

Our aerospace machining and inspection processes ensure every fastener meets the highest standards of performance and safety.

Oil and Gas and Pressure System Fasteners

Fasteners used in oil and gas environments must resist corrosion, pressure, and chemical exposure. They also need to meet specifications such as ASTM A193/A194 for strength and API 20E (BSL-1, 2, 3) for manufacturing quality.

Greno produces oil and gas fasteners for:

• Downhole tools

• Wellhead equipment

• Offshore platforms

• Refinery systems

• High pressure valves and pumps

We machine these fasteners from corrosion resistant alloys designed for harsh, high chloride, and high temperature environments.

Power Generation and Turbine Fasteners

Power generation fasteners must perform in high temperature, high load environments. 

Greno makes custom fasteners for:

• Steam turbine parts

• Gas turbine parts

• Nuclear power systems

• Hydroelectric equipment

• Industrial boilers

Our power generation fasteners are engineered for long term reliability in thermal cycling and high vibration conditions.

Military Fasteners

Defense contractors need custom fasteners that meet U.S. military specifications (MIL-SPEC) for strength, durability, and reliability. Common material and design specs include QQ-N-281 (Monel) and AMS 5662 (Inconel). We work with both metals – and many more.

Greno manufactures:

• MIL SPEC bolts and studs

• Fasteners for armored vehicles

• Aerospace grade fasteners for military aircraft

• Components for weapons systems

• Fasteners for naval and marine applications

We provide full material traceability, rigorous inspection, and documentation required for defense contracts. Greno is certified under MIL-Q-9858 for military parts and is NIST SP 800-171 compliant for cybersecurity. We’re proud to offer military CNC machining backed by quality and security.

Custom Fastener Manufacturing Capabilities

Greno’s custom fastener manufacturing capabilities include precision machining, gun drilling, welding and hardfacing, and inspection and quality assurance. All of the service that you need are available under one roof. 

Precision Machining

Greno’s precision machining services can handle small and large fastener geometries with exceptional precision. 

Our capabilities include:

• Vertical and horizontal turning, up to large diameters

• 3 axis and 4 axis milling

• Tight tolerance threading

• Custom geometries and specialty profiles

• High volume repeatability

Gun Drilling (Deep Hole Drilling)

Our in-house gun drilling capabilities allow us to produce custom fasteners with:

• Deep internal bores

• Precision coolant channels

• Weight reduction cavities

• High straightness and tight tolerances

This capability is especially valuable for aerospace, energy, and heavy equipment fasteners.

Welding and Hardfacing

For fasteners requiring welding or wear resistance, Greno offers:

• MIG welding

• TIG welding

• Stellite welding and hardfacing

• Surface finishing

These processes extend the life of custom fasteners used in abrasive or high temperature environments.

Inspection and Quality Assurance

At Greno Industries, every fastener undergoes rigorous inspection, including:

• Dimensional verification

• Thread inspection

• Material certification

• Hardness testing

• Surface finish evaluation

• Nondestructive testing (NDT), as required.

We maintain full traceability from raw material to finished component.

Custom Fastener Types 

Greno manufactures these and other types of industrial fasteners.

Bolts

• Hex bolts

• Heavy hex bolts

• Socket head bolts

• Specialty aerospace bolts

• High temperature bolts

Studs

• Double ended studs

• Tap end studs

• Continuous thread studs

• Large diameter studs

Nuts

• Hex nuts

• Lock nuts

• High temperature nuts

• Custom profile nuts

Threaded Rods & Specialty Components

• Precision threaded rods

• Custom fastening components

• Engineered assemblies

Ask Greno Industries for Industrial Fasteners

When you can’t settle for an off the shelf fastener, Greno Industries delivers engineered solutions built for performance, reliability, and long-term durability. Our combination of advanced machining, materials expertise, and industry specific knowledge makes us a trusted partner for OEMs and field service companies that need the most demanding industrial fasteners. 

Contact Greno Industries to request a quote or discuss your custom fastener requirements.