We expect recent supply chain disruptions driven by Russia's invasion of Ukraine and the related sanctions, combined with raw material shortages, labor shortages, and transportation delays, to continue for the foreseeable future. These conditions have strained our suppliers and extended supplier delivery lead times, affecting their ability to sustain operations. Further, a dockworker strike on the east coast which has been suspended until January 15, 2025, pending negotiations, could have a negative impact on our ability to obtain key manufacturing materials such as adhesives and epoxies should the strike ensue and continue for a sustained period of time beyond our safety stock levels. We have experienced market wide material shortages for paint and resin products as well as critical epoxies and chemicals used in our manufacturing process. In addition, we have seen substantial increases in the costs of aluminum, steel and acrylic commodities and experienced supplier schedule delays for other key components which were driven by supplier labor and material shortages. In several cases, spotty supply and material shortages have resulted in stocking higher inventory "safety stock" levels to ensure adequate lead time to replenish critical supplies.
We have selectively single-sourced some of our material components in order to mitigate excess procurement costs associated with significant tooling and startup costs. Furthermore, because of the nature of government contracts, we are often required to purchase selected items from U.S. government approved suppliers, which may further limit our ability to utilize multiple supply sources for these key components.
To the extent any of these single sourced or government approved suppliers may have disruptions in deliveries due to production, quality, or other issues, we may also experience related production delays or unfavorable cost increases associated with retooling and qualifying alternate suppliers. The impact of delays resulting from disruptions in supply for these items could negatively impact our revenue, our reputation with our customers, and our results of operations. In addition, significant price increases from single-source suppliers could have a negative impact on our profitability to the extent that we are unable to recover these cost increases on our fixed price contracts.
Each contract has a specific quantity of material which needs to be purchased, assembled, and shipped. Prior to bidding on a contract, we contact potential sources of material and receive qualified quotations for this material. In some cases, the entire volume is given to a single supplier and in other cases, the volume might be split between several suppliers. If a contract has a single source supplier and that supplier fails to meet their obligations (e.g., quality, delivery), then we would seek to find an alternate supplier and bring this information back to the final customer. Contractual deliverables would then generally be re-negotiated (e.g., specifications, delivery, price). As of September 29, 2024, approximately 7% of our material requirements were single-sourced across 10 suppliers representing approximately 15% of our active supplier order value. Single-sourced component requirements span across all of our major product lines.
We consider it a material financial or schedule risk if we believe it will take us at least three months to identify and qualify a suitable replacement for specialized single source suppliers. In the table below, we identify those specialized single source suppliers with respect to which we face such a material risk and the product lines supported by those materials utilized by us as of September 29, 2024.
Product Line Supply Item Risk Purchase Orders Sighting Systems DDAN Digital camera system Alternative source would take in excess of six months to qualify Current firm fixed price & quantity purchase orders are in place with the supplier to meet all contractual requirements. Periscopes Die-cast housings All die cast tooling is consolidated at this supplier. It would take approximately six months to move tooling and re-qualify a new supplier. Current firm fixed price & quantity purchase orders are in place with the supplier to meet all contractual requirements. Supplier is on schedule. Periscopes Steel castings Alternative supplier source would take six months to qualify. Current firm fixed price & quantity purchase orders are in place with the supplier to meet all contractual requirements. Vision Blocks Military Spec welded housings for vision blocks Would take approximately 8-10 months to re-qualify a new supplier source. Currently working with current vendor to keep supply of these parts Vision Blocks Large/Small/Customs Blocks Would take approximately 4-6 months to re-qualify a new supplier source. Currently working with single source for purchasing material on a forecast projection basis MRS Aluminum Castings for Housing Would take approximately 8-12 months to re-qualify a new supplier source. Currently, ordering for a single source, new casting tool and FAT will be required to qualify a new source Big Eye Sand castings for big eye binocular parts Would take approximately 4-6 months to re-qualify a new supplier source Current firm fixed price & quantity purchase orders are in place with the supplier to meet all contractual requirements. Beamsplitter Glass tight dimensions and Special Coating Limited number of suppliers that can meet tight customer specifications without deviation Current firm fixed price & quantity purchase orders are in place with the supplier to meet all contractual requirements. Applied Optics Center M22/M24 Binocular Spare Components Only approved source due to proprietary rights. Alternate source cannot be developed. Current firm fixed price and quantity purchase orders are in place with the supplier to meet all contractual requirements. Supplier is on schedule. Applied Optics Center LIF Assembly Container Wrench and Retaining Ring Mold tooling was manufactured by and used by one source. Tooling would not fit other potential supplier's equipment. Finding another source would be very expensive and take approximately 1 year to transition Current firm fixed price and quantity purchase orders are in place with the supplier to meet all contractual requirements. Supplier is on schedule.
Applied Optics Center LIF Assembly Rubber Seal Mold tooling was manufactured by and used by one source. Tooling would not fit other potential supplier's equipment. Finding another source would be very expensive and take approximately 1 year to transition Current firm fixed price and quantity purchase orders are in place with the supplier to meet all contractual requirements. Supplier is on schedule. Applied Optics Center Assorted LFU Assemblies Anti-Reflective Device Only one approved government source of supply at this time Current firm fixed price and quantity purchase orders are in place with the supplier to meet all contractual requirements. Supplier is on schedule.