Stainless Steel Flush Bolt is a recessed door locking component, primarily installed inside the inactive leaf of double or paired doors. It securely fixes the door to the floor or door frame structure via retractable bolts that extend upwards and downwards. Unlike traditional exposed bolts, this product features a concealed design, sitting flush with the door surface after installation, thus maintaining the overall visual integrity. It is suitable for door systems requiring high standards of appearance, structural stability, and long-term reliability.

These Stainless Steel Flush Bolts are manufactured from stainless steel, offering both high strength and corrosion resistance. They are available in various lengths, such as 150mm, 200mm, 250mm, and 300mm, and can be custom-made via OEM according to project drawings, meeting the comprehensive requirements for locking precision and durability in engineering doors, villa doors, and public buildings.

Stainless Steel Flush Bolt Parameters:

Stainless Steel Flush Bolt Features:

1. High Strength

The Stainless Steel Flush Bolt is manufactured from SS201, SS304, or SS316 stainless steel, with a tensile strength exceeding 520MPa. It maintains structural stability even under frequent opening and closing conditions. The bolt's linear movement tolerance is controlled within ±0.15mm, effectively preventing jamming or loosening after prolonged use, making it suitable for high-frequency door applications.

2. Precision

The product's key sliding parts are manufactured using CNC machining technology, and the clearance between the bolt and guide groove is controlled within 0.2mm, ensuring smooth and stable operation without wobbling. The Flush Bolt's internal structure has undergone multiple durability tests, supporting at least 100,000 opening and closing cycles, guaranteeing consistent feel and reliable locking over long-term use.

3. Concealed Design

The Stainless Steel Flush Bolt features a recessed installation method, with only the operating button exposed after installation, resulting in a flush finish with the door panel. The panel thickness is precisely controlled between 1.5mm and 3.0mm, ensuring structural strength while preventing protrusions on the door surface that could affect door closure accuracy and aesthetics.

4. Corrosion Resistance

The product surface can be treated with Satin, Polished, PVD, or custom coatings. Salt spray testing shows no significant corrosion after more than 72 hours. For humid environments or buildings with significant temperature fluctuations, the Stainless Steel Flush Bolt effectively reduces the risk of corrosion, extending the lifespan of the entire door hardware system.

5. Customizable

This Stainless Steel Flush Bolt supports customization of multiple lengths and installation dimensions. The bolt travel range can be adjusted according to door panel thickness, door frame structure, and installation method, with a maximum travel of over 18mm. OEM customization includes drawing confirmation and sample testing to ensure that mass-produced products perfectly match engineering requirements.

Stainless Steel Flush Bolt Application:

1. Residential Double Doors

In residential double door structures, stainless steel flush bolts are commonly used to secure the secondary door leaf, ensuring stability when the main door leaf is opened. Their concealed design does not affect the appearance of the door panel, and the vertical locking mechanism between the bolt and the floor or door frame effectively enhances the overall anti-swaying capability of the door.

2. Villa Entrance Doors

Villa entrance doors typically have larger door panels and require higher locking stability. Using stainless steel flush bolts enhances the security of the secondary door leaf without adding exposed hardware, preventing door displacement caused by wind pressure or frequent opening and closing, thus improving overall safety.

3. Hotel Project Doors

Hotel project doors emphasize quiet operation, durability, and a uniform appearance. Stainless steel flush bolts operate smoothly and quietly, with a friction coefficient of less than 0.2 during bolt sliding, effectively reducing structural noise during nighttime use and meeting the hotel's requirements for a quiet environment.

4. Hospital Functional Doors

In hospital environments, doors require frequent opening and closing and have high demands for hygiene and corrosion resistance. The stainless steel material of the flush bolt is easy to clean, and its surface is less prone to staining.  The concealed design reduces hard-to-reach cleaning areas, meeting the needs of medical spaces.

5. Commercial Public Spaces

In public spaces such as shopping malls or office buildings, double doors need to balance aesthetics and high usage frequency. Stainless steel flush bolts maintain stable locking under long-term, high-frequency use, reducing maintenance requirements and helping to lower overall operating costs.

Stainless Steel Flush Bolt FAQs:

Q: Is the Stainless Steel Flush Bolt suitable for all double door structures?

A: The Stainless Steel Flush Bolt is suitable for most double door structures, but installation conditions need to be confirmed based on door leaf thickness, door frame type, and floor structure. It is recommended to provide door drawings before selection to ensure that the bolt travel and installation depth are compatible.

Q: How do different lengths of Flush Bolts affect their use?

A: Different lengths mainly affect the bolt travel and fixing depth. For taller doors or deeper floor structures, it is recommended to choose specifications of 200mm or more to ensure sufficient effective length of the bolt entering the fixing point, improving overall stability.

Q: Does the Stainless Steel Flush Bolt require regular replacement?

A: Under normal use and correct installation conditions, the product's design life covers a long service cycle. Only routine cleaning and inspection are required; frequent replacement is generally unnecessary, effectively reducing future maintenance costs.

Q: Do you support custom non-standard sizes?

A: Yes. The Stainless Steel Flush Bolt can be OEM customized according to customer-provided dimensions, drawings, or samples, including length, panel size, and bolt travel adjustments, suitable for the personalized needs of engineering projects.

Q: Are there high requirements for the processing accuracy of the door during installation?

A: This product has an embedded structure, which requires a certain degree of precision in the door's grooving. It is recommended to control the processing error within ±0.5mm to ensure smooth bolt sliding and that the panel is flush with the door after installation.