ASMET is a manufacturer of special bolt products (according to customer drawings, made of special materials, etc.) designed for high temperature, high pressure applications and other purposes.

The manufacturing program of Fabryka Śrub BISPOL sp. z o.o. includes a range of bolt products with different lengths, thread pitches and mechanical property classes 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, 12.9 manufactured in accordance with PN, PN-EN, ISO, DIN, as well as non-typical fasteners manufactured in accordance with customer drawings and documentation.

metal working (CNC)

Asmet has modern machinery, 3- and 4-axis CNC milling centres, NC lathes, band saw machines, thread-rolling machines. The manufacturers of machine tools include Doosan, Avia, Amada, Profiroll and others. We machine all grades of steel, including hardened workpieces and those made of special alloys and non-ferrous metals.
Scope of machining:

  • Turning: max turning diameter D=650 mm, max length L=1250 mm,
  • Milling: 4-axis, table dimensions 1250 x 700 x H=600 mm,
  • Thread rolling: throughfeed and infeed rolling, metric and inch threads with a diameter of up to M72x6 (3”)
  • Cutting solid bars: Dmax = 265 mm
  • Micro-impact marking: area of 100 x 100 mm, also on cylindrical surfaces
metal forming

The production range of Fabryka Śrub Bispol sp. z o.o. includes cold forging (bolts, screws, pins) and thread rolling. These operations are carried out using boltmakers (multi-operational machines consisting of a five-die press, pointing machine and rolling mill used to make “ready” bolts), or separately – forging on presses and then rolling on thread mills.
production range: M3x5 – M16x160

In the Innovation and Implementation Centre in Reguly we roll threaded rods, other soft steel products and class 10.9 hardened bolt products, steels for power engineering and some Ni-Cr alloys.
Scope of rolling:
throughfeed and infeed rolling: from M 6 to M 120×6
length of through-rolled parts: L ≤ 4 500 mm


We apply zinc coatings with passivation in blue, yellow and iridescent silver colours with no hexavalent chromium, meeting the requirements of PN-ISO 4042 and PN-EN 12329 as well as the automotive industry standards. Bispol’s galvanising plant offers coatings with a standard thickness of 6-10 microns and above 10 microns according to the individual needs of customers.

Our galvanising line is certified for compliance with the requirements of AAA (Atotech Automotive Applicator) specification.

heat treatment

We have two automatic toughening band lines. The equipment used for the quench hardening of bolt products is the continuous furnace. A stable synthetic protective atmosphere based on nitrogen with the addition of propane ensures the lack of decarburisation when heating for quench hardening. The cooling agent is oil. The line is designed for the heat treatment of fasteners to obtain improved mechanical properties (class 8.8, 10.9, 12.9).
The in-plant laboratory enables a full range of tests to be performed as regards the mechanical properties of production materials and products, as well as spectroscopic analyses and metallographic tests (e.g. material macro- and microstructure, decarburisation profile).
Our heat treatment line is certified for compliance with the requirements of AIAG CQI-9 specification.

bolts and screws: M5 to M20, max length 200 mm
nuts: from M5 to M24
shaped workpieces: thickness up to 24mm, length up to 200mm
temperature: up to 900°C

quality inspection

The in-plant laboratories allow the conduct of a full range of tests as regards mechanical properties of production materials and products, as well as spectroscopic analyses and metallographic tests (e.g. material macro- and microstructure, decarburisation profile).

Certificates to EN 10204 – 2.1, 2.2, 3.1 also independent inspection to EN 10204 – 3.2 is possible by inspection bodies TÜV, DNV, UDT, ABS, RINA. These are internationally recognized certifying organizations for engineering or manufacturing standards. We produce specialty fasteners according to official regulations AD-2000 Merkblatt W0, Pressure Equipment Directive 2014/68/UE, Appendix 1, Paragraph 4.3. We are certified manufacturer of structural bolting assemblies to PN-EN 15048-1:2008.


machined materials

We  offer  steel  products  in  the  mechanical  property  classes  4.6,  4.8,  5.6,  5.8,  8.8,  10.9  and  12.9,  as  well  as  A2 and A4 stainless steel products. We also manufacture special products from other materials:

  • steels for operation at elevated temperatures;
  • corrosion-resistant steels;
  • heat-resisting steels;
  • carbon and alloy steels, including nitriding and carburising steels;
  • nonferrous alloys – copper, brass, bronze and titanium.