Frequently Asked Questions

GVN Güven Civata is a fastener manufacturer and furniture-industry supplier based in Istanbul, Türkiye, operating since 1957. It supplies bolts, nuts, screws, studs, minifix and furniture connectors as well as bed base and sofa mechanisms, upholstery supplies, furniture legs, plastic accessories, castors, packaging and hardware, with an annual capacity of 10,000 tonnes and 17,000 stock items.

You can source fasteners, mechanisms, upholstery supplies, legs and packaging for furniture production from GVN Güven Civata in one order. Add products to the quote list on the website and send it with a single form, or contact us by phone or WhatsApp.

GVN Güven Civata is headquartered in Beylikdüzü, Istanbul, and also has a branch in Bayrampaşa, Istanbul. See the Contact page for addresses, phone numbers and directions.

Yes. GVN Güven Civata operates an ISO 9001 quality management system. The certificates are listed on the Certificates page.

Add the products you need to the quote list on our website, enter quantities and submit the form. Our team prepares a tailored quote based on size, finish and quantity and gets back to you. You can also request a quote by phone or WhatsApp.

Yes. GVN Güven Civata sells bolts, nuts, screws and fasteners wholesale to industry, especially furniture manufacturers. Special pricing is available for large and recurring orders of our own products.

For the cold-formed bolts and studs we manufacture, custom sizes, lengths and finishes can be considered for sufficient order quantities. Send your drawing or sample via the contact form.

Yes. GVN Güven Civata ships to customers abroad as well as across Türkiye. For export orders, contact us via the English contact form or by e-mail.

You can download our current product and materials catalogues as PDF files free of charge from the Catalogues page.

You can buy bed base lift mechanisms, gas springs and auto-locking bed base mechanisms wholesale from GVN Güven Civata in Istanbul. Browse the Mechanisms page and add items to your quote list, or order by phone. We ship across Türkiye and abroad.

Consider the total weight of the mattress and lid, the base size, the gas spring force (Newtons) and the opening direction. Heavier mattresses need stronger gas springs and a locking mechanism. Send your base size and mattress weight to GVN Güven Civata and we will recommend the right model.

GVN Güven Civata supplies sofa and armchair mechanisms wholesale, including Japanese, Balkan, zero-wall, corner, backrest and headrest mechanisms, as well as Z sofa-bed mechanisms, lift-top coffee table mechanisms and swivel plates.

Yes. GVN Güven Civata supplies gas springs in various forces for bed bases and cabinet lids. Specify the force and length you need in the quote form.

Furniture frames mostly use furniture (frame) bolts with wood nuts; metal frames use socket (Allen) bolts and rivet nuts; panel furniture uses minifix connectors and chipboard screws. GVN Güven Civata supplies all of them in various sizes and finishes.

A furniture frame bolt joins wooden frame parts together with a wood nut; it usually has a flat or round head with a hex socket. It is widely used in sofa, armchair and bed base frames. GVN Güven Civata manufactures frame bolts in-house by cold forming.

The marking shows the strength class. The first number is one hundredth of the tensile strength (8 → 800 MPa) and the second is the ratio of yield to tensile strength (0.8). So an 8.8 bolt has about 800 MPa tensile and 640 MPa yield strength. Highly loaded joints use 10.9 or 12.9.

A socket bolt has a hexagonal recess in its head for an Allen key and suits tight spaces or flush finishes; a hex bolt is tightened from the outside with a spanner. Furniture metal frames and table legs usually use socket bolts.

A threaded rod (stud bar) is a metric rod threaded along its full length. It is cut to length and used to connect parts between two nuts, for anchoring or in adjustable legs. GVN Güven Civata supplies threaded rods and studs in various diameters and finishes.

A minifix is a cam connector that joins two panels invisibly in cabinet furniture; it consists of a cam housing, a bolt and a dowel. GVN Güven Civata supplies minifix sets with plastic dowels or self-dowelling bolts wholesale.

Chipboard screws have deeper, sharper threads that grip particle board better without splitting it. They are used for back panels, handles, runners and hinges in panel furniture. GVN Güven Civata stocks chipboard, handle, runner, cabinet and back panel screws.

Wood nuts are inserted into timber to give the bolt a strong threaded seat, used in sofa and bed frames. Rivet nuts create threads in thin sheet and tubes, used in metal furniture and table frames.

GVN Güven Civata supplies upholstery materials wholesale, including zig-zag springs, elastic webbing, staples, decorative nails, buttons and adhesives, as well as polyester fibre, wadding and zips.

Zig-zag springs give a firmer, longer-lasting seat and are common in classic sofas. Elastic webbing gives a lighter, more flexible seat and suits modern slim designs. Many makers use webbing on the back and springs on the seat.

GVN Güven Civata supplies pneumatic upholstery staplers and staples in different series such as 80 series. Tell us your tool model and we will match the right staples.

GVN Güven Civata supplies sofa, armchair and bed base legs, adjustable centre legs and pin legs wholesale. Request different heights, colours and materials through the quote list.

Bed base handles, two-step handles, locks, corner guards and slat holders are in the Plastic Accessories group of GVN Güven Civata.

Yes. Stretch film, bed and mattress bags and edge protector profiles for furniture shipping are in the Packaging & Safety group of GVN Güven Civata.

Bolt-on office chair castors and furniture castors are available in the Castors group of GVN Güven Civata.

White (blue-white) and yellow finishes are electro-galvanised zinc; yellow passivation offers slightly higher corrosion resistance. Black finishes (black oxide or black zinc) are chosen for appearance on visible parts. For humid environments, more resistant coatings or stainless steel are recommended.

M stands for metric thread and the number is the nominal outer diameter in millimetres. An M8 bolt is about 8 mm in diameter. Length is written as in "M8x40", measured in millimetres from under the head to the tip.

Numbers such as DIN 912, ISO 4762 or DIN 933 are standards defining the dimensions and tolerances of a fastener. Quoting the standard in your order ensures you receive exactly the right part. GVN Güven Civata product pages show the relevant standard.