Certified for compliance, speed, and real-world production.
Defense programs rarely start with a full drawing package on day one. They start with a part number, a material spec, and a supplier who can receive the print without creating a compliance problem. Great Lakes Industrial manufactures and supplies the gaskets, seals, O-rings, fluid connectors, hydraulic valves, molded components, fasteners, and fluid power assemblies those programs specify, with technical data handled inside our certified, access-controlled environment, the same CMMC manufacturing environment our customers have come to rely on.
Program engineers need expert technical support, quality control, and innovative solutions when designing mission-critical defense applications, and our defense contractors count on us to meet that demand securely. We’re a C3PAO-certified engineered solutions provider whose system meets all 110 NIST SP 800-171 security controls, so your technical data, including Controlled Unclassified Information (CUI), stays safe.
Custom and standard gaskets in rubber, foam, paper, felt, and plastic, cut and produced to print for compression, thermal, and pressure requirements. Whether you need a single die-cut gasket for a cover plate or a production run of molded gasket sets, we support prototype through production quantities, with Mil-Spec material options where the drawing calls for them.
A full range of O-rings, oil seals, piston and rod seals, and custom sealing technologies for diverse defense applications. GLI’s 70 years of experience with quality and testing standards ensure that all compounds are formulated to meet the most stringent industry standards including FDA, USP, KTW, DVGW, BAM, WRAS (WRC), NSF, Underwriters Laboratories (UL), Aerospace (AMS) and many other customer-specific requirements
Hose assemblies, fittings, and fluid connector components, including quick-disconnects and adapter fittings, for hydraulic and pneumatic systems. As a 60-year Parker Hannifin partner, we source and build to spec across a wide range of pressure classes and end configurations.
For 30 years, our Fluid Logic Valve line has manufactured zero-leak, poppet-based directional control valves designed for low-viscosity and high-water-based soluble oil fluids. These valves are engineered with special materials and advanced techniques to withstand the erosive nature of low-viscosity fluids at high pressures, conditions that quickly damage conventional hydraulic spool-type valves.
We manufacture grommets, boots, bellows, molded shapes, over-molded parts, profile seals, and custom extrusions in rubber and polymer compounds, precisely customized for specific OEM applications in a variety of shapes, sizes, colors, and material hardness.
Metal, plastic, and specialty fasteners, including screws, nuts, bolts, pins, rings, clamps, and clips, available as line items or kitted alongside the sealing components they install with.
Mil-Spec materials and parts available. ISO 9001 certified quality system, backed by a CMMC certified facility. Material certifications and documentation packages provided on request.
Whether what you need is a catalog off the shelf (COTS) part or a custom component we’ll work to engineer the right solution for your application. Once we’ve aligned on what you need our aim is to be your stocking distributor partner. If we’re manufacturing the component ourselves, sourcing it from our trusted supplier base, or kitting we’ll stock inventory for your demand so that you won’t be beholden to manufacturer’s lead times and order minimums. We’ll carry that inventory at any of our facilities across the US whichever is most conductive to your production needs. We even support same day delivery for select customers in the Midwest.
Speak with a Sourcing EngineerOur CMMC Level 2 certification - verified through C3PAO assessment - removes exposure. One non-compliant manufacturer anywhere in your supply chain can knock your entire contract bid out of contention. You can award subcontracts to GLI knowing your CUI will be handled in line with DoD requirements.
If you're still working through your own CMMC requirements, or figuring out what CMMC readiness looks like for your supply base, ask us directly. We’ll guide you on how our level 2 certification aligns with your program requirements.
When handling technical information we rely on controlled processes designed to protect sensitive data and maintain compliance across the defense supply chain.
✓ Secure exchange of technical drawings and models
✓ Controlled access portals where required
✓ Secure email and encrypted file transfer
✓ NDA-backed technical discussions
✓ Incident response plans
Compliance obligations flow downhill. Whether you’re a defense contractor managing multiple DoD contracts or a smaller shop with less flow-down requirements to satisfy, the requirement to protect Controlled Unclassified Information lands on everyone who touches it. Great Lakes Industrial is built to be a safe and secure link in our customer’s supply chain. We support both ends of that range, across the specific supply chains our customers operate in.
Prime Contractors:
Secure, in-house manufacturing and an approved supplier network to support active defense programs. Safeguarding technical data providing documentation compliance teams need for supplier qualification.
Tier 1 and Tier 2 Suppliers:
GLI is a CMMC-certified partner able to meet the flow-down requirements contracts now stipulate. You get a certified source for sealing technologies and fluid-connecting components, and a partner who understands what your prime is going to ask of you.
Procurement and Sourcing Teams:
Vendor qualification, quote turnaround, and part availability across 40,000+ inventoried components. We respond quickly to RFQs, including short-notice requests, and ship same day on stocked items.
Engineering and Program Teams:
Secure exchange of drawings, models, and specifications, plus sealing design support during development. NDA-backed technical discussions are standard practice for us, not an exception.
MRO and Sustainment Programs:
Ongoing supply of replacement seals, gaskets, valve components, and maintenance parts for fielded systems, including legacy parts that are difficult to source elsewhere.
Across all five groups, the constant is the same: a level 2 certified manufacturing partner that maintains all the controls required by CMMC.
Our vision is to be our defense customers first choice for engineered solutions. Submit a design.
Compliance claims only matter if they can be verified. This is the detail level defense contractors ask for after their own third-party assessment. Here's exactly what we hold, what it covers, and what we can provide in writing.
CMMC Level 2, independently assessed
Certified by an accredited C3PAO on [certification date]. Certificate ID [ID] available on request. Scope covers a dedicated, access-controlled environment built for handling Controlled Unclassified Information, including technical drawings and specifications.
NIST SP 800-171 aligned
Our security practices are built against the 800-171 control set that underpins our Level 2 certification, with documented policies, monitoring, and incident response.
SPRS score on file
Our assessment results are reported in the Supplier Performance Risk System under CAGE code 643A6. Score available to qualified buyers on request.
DFARS 252.204-7012 compliant
We meet the safeguarding and cyber incident reporting obligations required of contractors handling covered defense information. [Confirm before publishing.]
ISO 9001 certified
Our quality management system covers manufacturing and distribution operations, backed by over 70 years of production history.
Mil-Spec materials and parts
Materials sourced and documented to military specification where the drawing requires it, with certifications of conformance provided.
Documentation available on request
Certificates of conformance, material certifications, first article inspection reports, and our CMMC certification details for your supplier file, ready for your own audit readiness or program review.
Whether you need a secure manufacturing partner for an upcoming bid, want to build long-term manufacturing partnerships across your supply base, or need a straight answer on CMMC compliance, Great Lakes Industrial is ready to help.
