Marks USA 5SS55N Institutional Anti-Ligature Passage Mortise Lockset with Solid Stainless Steel Trim, Keyless
Part Number: 5SS55N
Marks USA 5SS55N Institutional Anti-Ligature Passage Mortise Lockset with Solid Stainless Steel Trim, Keyless
The Marks USA 5SS55N is a heavy-duty institutional anti-ligature passage mortise lockset engineered for demanding commercial environments where safety and durability are paramount. Designed for keyless passage function (ANSI Function F75), the latch is retracted by knobs or levers at all times, making it ideal for high-traffic corridors, healthcare facilities, and institutional settings. Built to a 1-3/4" standard door thickness with a 2-3/4" backset, this lockset meets or exceeds all operational and security tests of ANSI A156.13-2005 for Series 5000, Grade 1, and is rated for a minimum of 1,500,000 life cycles. Solid stainless steel construction throughout ensures long-term performance in the most rigorous applications.
Key Features
- Exceptional Durability: Life tested to a minimum of 1,500,000 cycles, ensuring long-term reliability in high-traffic institutional and commercial applications.
- Anti-Ligature Safety Design: Solid stainless steel interior and exterior tapered knobs or levers recessed into thru-bolted roses, featuring safety knobs with recessed grip and finger indents (Patent #D587556) to minimize ligature risk.
- Solid Stainless Steel Construction: Solid cast stainless steel levers, solid stainless steel cylinders with solid stainless steel security collars, and a solid stainless steel latch with antifriction latch lever for superior corrosion resistance and durability.
- Precise Lock Specifications: 2-3/4" backset; adjustable bevel steel backplate measuring 1-1/4" x 8" x 7/64" thick; 3/4" reversible latch throw; 1/2" reversible auxiliary deadlatch throw; cover plate 1/16" thick with tamper-proof screws.
- Tamper-Resistant Strike: Includes a 4-7/8" curved lip stainless steel strike secured with tamper-proof screws for added security and resistance to forced entry.
- ADA-Compliant Lever Operation: Safety lever for handicapped access on clutch-operated mortise lock; levers rotate up and down freely in both locked and unlocked positions for accessible, ergonomic operation.
- Robust Internal Components: Stamped steel case 3/32" thick with zinc dichromate finish; steel hubs (9/32" on diamond, 5/16" on square) with security separator; steel hub lock arm 1/8" thick; independent spring-loaded spindles for reliable, consistent operation.
- Standard Door Preparation: ANSI A115.1 lock face cutout with 2-1/8" through hole for knob/rose assembly; front size 1-1/8" x 2-1/4" for straightforward installation on standard commercial doors.
Certifications & Compliance
- ANSI/BHMA A156.13-2005 Series 5000, Grade 1 — Meets or exceeds all operational and security tests
- ANSI/BHMA Certified
- UL Listed
- ADA Compliant
- ANSI Function F75 (Passage/Hall/Closet — Latch retracted by knobs/levers at all times)
Technical Specifications
- Series: 5SS19 Series
- Latch Throw: 9/16"
- Product Group: Mechanical Locks
- Product Subgroup: Bored Locksets
- Product Type: Cylindrical Locks
- Subcategory: Cylindrical Locks
- ANSI/BHMA: ANSI/BHMA, UL Listed
- Commercial/Residential: Commercial
- Lock Type: Cylindrical
- Function Description: Latch retracted by knobs/levers at all times
- Front Size: 1-1/8" x 2-1/4"
- ADA Compliant: Yes
- Keyed: No
- ANSI Function: F75
- Product Attribute: Cylindrical Locks
- Product Function: Passage/Hall/Closet
- Latch Type Specification: Deadlocking
- Product Category: Mechanical Locks
- Department: Door Hardware
Typical Applications
- Healthcare and Behavioral Health Facilities
- Institutional and Correctional Environments
- Educational Facilities and Schools
- Commercial Office Buildings
- Government and Municipal Buildings
- Multi-Tenant Residential and Assisted Living Properties
- High-Traffic Corridors and Common Areas
Why Marks USA 5SS55N?
Marks USA 5SS55N mortise locksets are built to the highest institutional standards, combining solid stainless steel construction throughout with a life test rating of 1,500,000 cycles minimum and full compliance with ANSI A156.13-2005 Grade 1 requirements. The anti-ligature design — featuring patented recessed safety knobs (Patent #D587556), thru-bolted roses, and tamper-proof hardware — makes this lockset the trusted choice for professionals specifying door hardware in safety-critical commercial and institutional environments.
Return and Refund Policy
Thank you for shopping at Golden Locks Inc.
If, for any reason, You are not completely satisfied with a purchase We invite You to review our policy on refunds and returns.
The following terms are applicable for any products that You purchased with Us.
Return, Cancellation & Special Order Policy
Golden Locks Inc. sells professional door hardware, security products, and custom-configured items.
Due to the nature of these products, the following policies apply to all purchases made through our website or store. By placing an order with Golden Locks Inc., the customer agrees to the terms outlined below.
Order Changes & Cancellation Policy :
• Customers may request order changes, modifications, or cancellations within 24 hours of placingnan order.
• Requests must be submitted by email to CS@GoldenLocksinc.com.
• After 24 hours, the order may already be processed, allocated from inventory, submitted to thenmanufacturer, entered into production, or prepared for shipment.
• Orders canceled after 24 hours are subject to a minimum 25% restocking and processing fee.
• Golden Locks Inc. reserves the right to refuse cancellation if the order has already been shipped, manufactured, customized, cut, keyed, or assembled.
Custom Orders / Special Orders (Non-Cancelable & Non-Returnable)
• Many products sold by Golden Locks Inc. are custom-configured or special-ordered directly from manufacturers.
• Examples include Emtek configured hardware, Hoppe multipoint trim sets, special finish hardware, multipoint lock components, keyed cylinders, and custom door hardware configurations.
• Once these orders are submitted to the manufacturer, they cannot be canceled, returned, or refunded.
Standard Return Policy (Stock Items Only)
• Return request must be submitted within 30 days of delivery.
• Product must be unused, uninstalled, and in original packaging.
• Approved returns are subject to a 25% restocking fee and deduction of original shipping costs.
• Customer is responsible for return shipping costs.
Non-Returnable Products
• Custom or special-order hardware
• Emtek configured products
• Hoppe trim sets and multipoint hardware
• Keyed locks or cylinders
• Cut keys
• Electronic locks once powered or installed
• Safes once delivered or installed
• Clearance or discounted items
• Items showing signs of installation
Shipping Claims (Damage or Missing Items)
• Customers must inspect shipments immediately upon delivery.
• Claims for damage, missing parts, or incorrect items must be reported within 48 hours of delivery.
• Customers must provide photos of the product, packaging, and shipping label.
Chargebacks & Payment Disputes
• Customers agree to the policies stated on this page when placing an order.
• Golden Locks Inc. may provide order confirmations, shipping confirmations, tracking information, and policy acceptance records to payment processors in the event of disputes.
Return Authorization Required
• All returns require a Return Merchandise Authorization (RMA).
• Unauthorized returns may be refused.
Product Page Notice (Recommended)
• This product may be custom ordered or configured to your specifications.
• Orders may only be canceled or modified within 24 hours.
• After 24 hours a 25% restocking fee applies.
• Custom and special-order items are non-cancelable and non-returnable once processed.
Contacting Us
Please contact us with as much information about your return request as possible. We will need:
- Your order ID.
- First and last name.
- Phone number : +1-800-385-7725
- The items you wish to return (if your order contains multiple items.)
- The reason for your return.
- Any relevant return details or images.
- By visiting this page on our website: https://goldenlocksinc.com/pages/contact-us
Not providing this information may delay your return.
Please email us at CS@GoldenLocksinc.com to authorize a return.
Return Address
Golden Locks Inc.
16371 Gothard Street, Suite G
Huntington Beach, CA 92647
United States
