High-Quality Concealed Hinges for Industrial and Commercial Applications

No, Sierra Pacific does not sell concealed hinges to the public, as we are not a retail establishment. We sell business-to-business (B2B) only. If you need a source for SPEP products in small quantities, we encourage you to visit our partner, Hard-To-Find Hardware at www.HTFHardware.com.

Yes! SPEP is ISO 9001:2015 certified. You can learn more about this on the About Us page of our website.

Concealed hinges, also known as “invisible hinges,” are a unique hinge type that remains discreet by being tucked away inside an opening. It’s commonly applied to doors and cabinets, as being invisible from the outside provides a cleaner, more aesthetically pleasing design.

Industrial clients enjoy a wide range of benefits from industrial concealed hinges, including:

• An Aesthetically Pleasing Look: One of the most compelling reasons to choose concealed hinges is the clean, refined look they offer. Without the visible hardware interrupting the surface, furniture and cabinets look sleeker and more modern.
• Adjustability: Many concealed hinge models offer adjustability so that you can easily alter the door’s alignment after installation. This eliminates the need to uninstall a door when a slight misalignment is discovered.
• Design Flexibility: When you don’t have to cater to an external hinge, your design team has more flexibility when creating your cabinet or door.
• Enhanced Durability: Concealed hinges are not as exposed to external elements, like chemicals and moisture. This reduces wear and helps ensure a longer lifespan.
• Improved Security: Concealed hinges can also add an element of security. Since the hinge mechanism is hidden, potential intruders will have a tough time tampering with or removing the hinge.

These are just a few of the many reasons you should consider industrial concealed hinges from SPEP. Another benefit of partnering with SPEP is our customization services, we keep our customer’s wants and desires at the top of our priorities list.

Sierra Pacific Engineering and Products (SPEP) has a talented in-house engineering team that offers comprehensive design and prototyping services for concealed hinges. While we have a huge catalog of ready-to-manufacture parts, we understand that every project is unique.

If you can’t find what you need in our massive catalog, our engineers can design a custom solution that meets the demands of your project. When working with our engineers, you can choose everything from the length and diameter to the finish and material.

As a leading industrial access hardware supplier for a variety of applications, SPEP offers concealed hinges in several different material and finish options.

Our primary material options include:

• Steel: Steel concealed hinges provide a cost-effective yet durable solution for all sorts of applications. Best suited for stable environments, steel hinges are strong and built to last.
• Stainless Steel: SPEP’s stainless steel concealed hinges offer exceptional corrosion resistance, making them a good option for commercial kitchens, food storage areas, and other environments where moisture is present.
• Aluminum: When you need to keep weight to a minimum but still require corrosion resistance, consider our aluminum concealed hinges.

Our finish are:

• Milled: Raw, uncoated finish for a clean, industrial look
• Passivated: Boosts corrosion resistance, especially on stainless steel
• Electropolished: Smooth, shiny surface that also improves corrosion resistance
• Zinc-Plated: Protective and attractive metallic coating that resists rust

If you need assistance determining which material and finish makes the most sense for your intended application, contact us for assistance.

Yes, all of SPEP’s concealed hinges are durability-tested. We are committed to upholding the highest standards and closely inspecting the hardware of every shipment before it leaves our facility. By conducting rigorous testing and quality control, we ensure that your components meet or exceed industry standards, including ISO certifications.

Don’t settle for less when it comes to industrial concealed hinges and other access hardware. Give your customers the very best by sourcing components from SPEP, an ISO-certified organization that prioritizes performance and reliability.

Yes, the minimum order amount for a new customer's first purchase of concealed hinges is $250. Subsequent orders have a $50 combined minimum.

Placing your concealed hinge order is a simple consultation away. Reach out to use via:​

• Emailing order@spep.com
• Calling (800) 433-5554
• Faxing (800) 301-8522

Yes, will call orders for concealed hinges are accepted, but must be called in or emailed to order@spep.com first. You’ll receive an email notification once your shipment is ready for pickup.​

SPEP’s hours of operation are 8:00am to 4:30pm local time Monday through Friday at each of our three warehouses in (CA, IL, & TX). Our customer service lines are open 5:00am to 5:00pm Pacific time.

Yes, concealed hinge orders can be placed anytime by emailing order@spep.com. We typically process orders within 24 hours, though orders received during off-hours may take longer to process.

Concealed hinge prices quoted or acknowledged are based on Sierra Pacific Engineering and Product’s (SPEP’s) current cost of material and labor. All of our standard pricing is based on tiered price breaks for single shipment quantities.

Yes! Customers are not required to be set up on credit terms, and can instead pay using a credit card at the time of shipment. Credit cards may also be used to pay for orders in the meantime while credit terms are being evaluated.

Yes! Special pricing beyond the standard matrix may also be available for catalog items ordered in especially high volumes. Price breaks for custom items are evaluated based on estimated annual usage (EAU) expectations and minimum order quantity (MOQ) to cover production lead times.

Unless otherwise specified, Customers agree to accept over-run or under-run volumes not exceeding 10% of quantities ordered. In cases where an overrun or under-run exceeds 10%, we may request acceptance in writing from the customer.

SPEP prefers to ship concealed hinges “freight collect” using any carrier our customers specify. In the absence of specific shipping instructions, we will use our own discretion in choosing a carrier.

SPEP assumes no responsibility for any such damage or loss or for transportation delays. We are also not responsible for insuring shipments unless specified by the customer, in which event such insurance shall be based on the customer’s valuation and at the customer’s expense. All claims for damage and loss, whether apparent or concealed, shall be filed by the customer with the carrier. Shortages and/or damage must be noted at the time of delivery.

Yes, SPEP ships concealed hinge orders worldwide from our US-based warehouses. Under appropriate circumstances, we can even coordinate “China to China” shipments directly from the factory.

How long it takes to receive your concealed hinge order will depend on when it was placed and the due date referenced in your purchase order. If no due date is given, your order will be shipped ASAP.

Upon receiving your order, SPEP provides an order acknowledgement with an estimated ship date. Any shipment date specified shall be the date of shipment from our plant. Shipment dates given by our order desk are estimates unless otherwise indicated.

Delivery may be subject to delays caused by strikes, fires, floods, accidents, pandemics, or any other cause beyond our control, including delays in the delivery of material to SPEP by third parties.

Yes, you can change your concealed hinge order. Change requests made after production has started will convert the order to a time and cost of materials basis unless we’ve agreed in writing to a price revision that reflects the cost of the changes. No changes may be made without SPEP’s prior written authorization.

Any concealed hinge order placed with and accepted by SPEP may be canceled only with the written consent of SPEP, upon payment of all expenses already incurred on the order by SPEP prior to the effective date of cancellation.

SPEP guarantees defect-free materials and workmanship for 120 days from delivery. If a concealed hinge is found to be defective, we will approve returns with an R.M.A. number and may replace or refund the item.

PLEASE NOTE that this warranty does not cover damage from misuse, improper installation, or environmental wear. SPEP is not responsible for removal, reinstallation, or incidental costs. No additional warranties, express or implied, apply.

If returns are necessitated due to errors of SPEP, the customer must obtain an R.M.A. Once obtained, SPEP will cover the cost.

If the customer made an error, only unused catalog items may be returned within 30 days through prior approval, an R.M.A., prepaid shipping, and a 20% restocking fee (minimum $25). Special orders cannot be returned unless defective.

You can download or view a PDF catalog right here on our website. You can also use the search function on our site to browse and filter parts by category or industry. Please contact us at (800) 433-5554 or sales@spep.com for sample and quote requests, as well as other inquiries.