Connection Technology for the Manufacturing Industry

Zilken supplies fasteners and fastening technology for the full range of industrial applications—from hex head screws compliant with DIN and ISO standards to high-strength custom-made products and pre-assembled installation kits.

Hex head screws and flange connections in an industrial plant – fasteners from the Zilken product range
TÜV certificate logo - ISO 9001

Why Choose Zilken for Connection Technology

Material width

The product range includes electrogalvanized and hot-dip galvanized steel, A2 and A4 stainless steel, brass, polyamide, and high-strength special steels such as 25CrMo4. The range covers all standard media resistance and corrosion protection requirements.

Compliant Procurement

Screws in accordance with DIN 933, DIN 931, DIN 912, and ISO 4014, 4017, 4762. Nuts according to DIN 934, DIN 985, and ISO 4032. Threaded rods according to DIN 976, stud bolts according to DIN 938 and DIN 939 — for applications in mechanical and plant engineering as well as in the process industry.

Strength Classes & Material Grades

From 4.6 for simple joints to 12.9 for high-stress structures. Corrosion-resistant grades A2-70 and A4-70 for outdoor use and contact with media. Special steels with material certificates for high-temperature and high-pressure applications in accordance with EN 10269.

Range of applications

Whether it’s flange connections, mechanical engineering, steel construction, civil engineering, chemical engineering, or food processing: Zilken supplies the right fasteners for all relevant applications. In the construction industry, this is referred to as fastening technology—the product range covers both areas. Thread sizes from M3 to M45, as well as strength grades and materials tailored to specific requirements, are available.

Packaging & Sets

Whether it’s assembly kits based on a parts list or custom screw sets: Zilken handles picking, packing, and labeling in accordance with the production process. The parts arrive exactly where they’re needed—ready for assembly.
‍Learn more about kitting & sets

One-stop procurement

Zilken not only handles the delivery of individual items, but also coordinates bill of materials, suppliers, and logistics for complex procurement requirements—from individual parts to assembled kits. Fastening technology as part of an integrated C-parts and MRO portfolio.

Select specifications, submit a request

Here you will find an overview of the materials, standards, and product types that Zilken sources and supplies in the field of fastening technology. If something isn’t listed here, we’ll source it for you.

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Product Categories

Machine screws Hex head screws Cylinder head bolts Hex nuts Fastening technology (construction) Stud bolts Threaded rods Threaded bolts Lock nuts Wood screws Particleboard screws Sheet metal screws Expansion screws Threaded pins Shaft screws Washers Spring washers Retaining rings Toothed washers / Fan washers Cap nuts Wing nuts Eye bolts / Ring bolts Tension pins / tension sleeves Blind rivets / Blind rivet nuts Wire thread inserts Wedge lock washers Lock screws Assortments (screw + nut + washer) Assembly kits / Screw sets Threaded inserts Cover caps / Cover plugs

eCl@ss classification

Name eCl@ss 5.1 eCl@ss 7.1 eCl@ss 16.0
Machine screw, flat-head, external drive 23-11-06-21 23-11-06-21 23-11-01-01
Machine screw, flat-head, internal drive 23-11-06-27 23-11-06-27 23-11-01-02
Flat disc, round 23-09-90-06 23-09-90-06 23-09-05-01
Flat-bottomed nut with drive 11/23/08/21 23-11-08-21 23-11-07-02
Machine screw, non-flush 23-11-01-13 23-11-01-13 23-11-01-03
Machine screw, flat-head, external drive, with nut 23-11-12-02 23-11-12-02 23-11-12-02
Expansion screw without head 23-11-03-04 23-11-03-04 23-11-03-04
Screw, nut (other, unspecified) 23-11-90-04 23-11-90-04 23-11-90-90
Threaded rod, threaded fitting 23-11-03-01 23-11-03-01 23-11-03-01
Stud bolt, threaded bolt (without drive) 23-10-01-06 23-10-01-06 23-11-03-03
Tapped stud, shaft screw (with drive) 23-10-01-07 23-10-01-07 23-11-03-05
Spring washer 23-09-03-01 23-09-03-05 23-09-03-05
Flat-mounted nut with clamping piece and drive 23-11-07-05 23-11-07-05 23-11-07-03
Assortment of screws, nuts, and washers 23-11-92-16 23-11-92-16 23-11-14-06
Hand-operated screw 23-11-06-03 23-11-06-20 23-11-06-01

Product Types / Designs

Hex head screw Cylinder head screw Hex nut Countersunk screw Washer / flat washer Threaded pin / grub screw Assembly kit / screw set Wood screw Threaded bolt Spring washer Stud screw Particleboard screw (incl. SPAX®) Threaded rod Retaining ring (Seeger ring type) Eye bolt / Ring bolt Self-tapping screw Cap nut Tension pin / tension sleeve Dome head screw Flat-head screw Cylinder pin Tooth/fan washer Blind rivet / Blind rivet nut Wing nut Wire thread insert (incl. Helicoil®, Ensat®) Wedge lock washer (including Nord-Lock®) Lock washer (incl. SCHNORR®, TECKENTRUP®) Expansion screw Slotted nut Lock screw

Materials

A4 (stainless steel, V4A, molybdenum-alloyed) A2 (stainless steel, V2A) Steel (general, unalloyed) Spring steel Stainless steel (general) Brass (CuZn) A1 (stainless steel, free-cutting steel) A5 (stainless steel, Mo-Ti alloyed) Plastic (general) Polyamide (PA 6 / PA 66 / PA 12) Aluminum Copper

Grades of stainless steel

1.4401 (X5CrNiMo17-12-2, A4) 1.4980 (X6NiCrTiMoVB25-15-2) 1.4310 (X10CrNi18-8, spring steel) 1.4571 (X6CrNiMoTi17-12-2, A5) 1.4122 (X39CrMo17-1) 1.4301 (X5CrNi18-10, A2) 1.4529 (high-alloy) 1.4305 (X8CrNiS18-9, A1) 1.4000 (X6Cr13) 1.4034 (X46Cr13) 1.4404 (X2CrNiMo17-12-2, A4L) 1.4828 (X15CrNiSi20-12) 1.4021 (X20Cr13)

Heat-resistant & quenched and tempered steels

25CrMo4 / 1.7218 21CrMoV5-7 / 1.7709 C35E / 1.1181 24CrMo5 / 1.7258 C45 / 1.0503 X22CrMoV12-1 / 1.4923

Strength classes

Stainless steel -70 (work-hardened) 8.8 5.6 10.9 4.8 4.6 12.9 5.8 Stainless steel -80 (high-strength) Stainless steel -50 (soft)

Drive Types (Head Drive)

Hex socket (Inbus®) Slotted (SL) Hexagon socket (Torx® / TX) Cross-recess (Phillips PH / Pozidriv PZ) External hex (SW) Square

Surfaces / Coatings

electrogalvanized (gal Zn) hot-dip galvanized (tZn, ISO 10684) thick-film passivated passivated (thin-film) bare (uncoated) Zinc flake coating (including DACROMET®, Geomet®) nickel-plated chromium-plated burnished phosphated

Thread sizes — metric (M)

M12 M16 M6 M8 M10 M20 M5 M4 M24 M3 M30 M27 M33 M36 M14 M2 M2.5 M39 M22 M45 M18 M42 M48

Thread sizes — Inches / UNC

UNC 5/8" 1/2" 3/8" 1/4" 5/16"

Hardness specifications

200 HV 140 HV 300 HV 100 HV

Certificates & Acceptance Documents

Type 3.1 Acceptance Test Certificate in accordance with EN 10204 REACH TÜV acceptance Acceptance Test Certificate 3.2 in accordance with EN 10204 Pressure Equipment Directive (PED 2014/68/EU) Building Authority Approval (abZ / ETA)

AD 2000 Information Sheets (Pressure Vessel Construction)

AD 2000 Information Sheet W7 AD 2000 Information Sheet W2 AD 2000 Information Sheet W0

DIN standards

DIN 933 DIN 912 DIN 931 DIN 2510 DIN 125 DIN 934 DIN 2510-5 DIN 84 DIN 267-13 DIN 125-1 DIN 267 DIN 976-1 DIN 963 DIN 571 DIN 975 DIN 127 DIN 6912 DIN 7984 DIN 985 DIN 939 DIN 938 DIN 965 DIN 603 DIN 7981 DIN 471 DIN 914 DIN 916 DIN 913 DIN 9021 DIN 7985

ISO standards

ISO 4017 ISO 4014 ISO 4762 ISO 4032 ISO 10642 ISO 7089 ISO 7090 ISO 8752 ISO 7380 ISO 1207 ISO 7093 ISO 14583 ISO 898-1 ISO 10684 ISO 2338 ISO 4027 ISO 10511 ISO 7042 ISO 4042 ISO 7045

EN standards

EN 10204-3 EN 10269 DIN EN 10204 DIN EN ISO 3506-1 DIN EN 1515-1 EN ISO 4014 EN 14399 DIN EN ISO 4014 EN 26157-3 EN ISO 10684 EN ISO 4017 EN ISO 898-1 EN 1515-4 EN ISO 3269 EN 13480-2 EN ISO 4032 EN 10272

Brand names in the product range

Phillips® (cross-recessed PH) SPAX® (particleboard screw) Pozidriv® (Phillips PZ) KORREX® (insulating sleeve) Torx® (ISR) Nord-Lock® (Wedge Locking Washer) Helicoil® (wire thread insert) SCHNORR® (locking washer) TECKENTRUP® (locking washer) DACROMET® (Zinc flake coating)

Can't find what you're looking for?

With a network of over 400 specialized suppliers and decades of procurement expertise, Zilken ensures that customers always receive the right fastener—whether it’s a standard part compliant with DIN and ISO standards or a custom-made item that is difficult to source.

C-Part Management at INFICON: From 108 Suppliers to a Single System

Zilken is taking over all C-part management at INFICON: 1,246 items, one point of contact, one system.

This is how Zilken streamlines the supplier landscape in connection technology into a cohesive whole.

Case Structured industrial supply chain with consolidated manufacturer structure

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