Global supplier · High-pressure fastening & sealing

Engineered to hold under pressure.

Certified, fully traceable fastening and sealing for the world's most demanding industries – oil & gas, petrochemicals, offshore wind, semiconductor and defence. From stud bolts to header plugs, shipped from stock to 39+ countries.

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HBS at a glance

One source. One standard of quality. Every joint traceable.

500.000+pcs ready to shippieces in stock, ready to ship

24 hdispatch for stock items

39+countries suppliedcountries supplied worldwide

7.550+projects deliveredprojects delivered since 1999

Trusted by industry leadersTrusted by the world's energy and industrial leaders

Dow

Recent projects

Proven on critical projects across Europe.

All projects →

Offshore wind · France

Fécamp offshore wind farm

Client: Saipem

Instead of expensive high-alloy materials, HBS supplied Xylan 1427 coated parts – a cost-effective way to protect the bolting in a corrosive offshore environment.

Xylan 1427 coated parts

Waste-to-energy · Poland

Waste-to-energy plant, Warsaw

Client: MPO / MVI, Warsaw

For the construction of MPO's new waste-to-energy plant, HBS supplied all ISO fastening parts – one source for the complete project.

All ISO parts

Nitrogen plant · Netherlands

Nitrogen installation, Zuidbroek

Client: NAM / Bronswerk Heat Transfer

For the construction of the nitrogen installation in Zuidbroek (Groningen), HBS supplied header plugs and plug gaskets for the heat exchangers.

Header plugsPlug gaskets

All projects →

Product families

One partner for the entire flanged joint.

Nine product groups and 10.000+ items to ASME, ASTM, DIN and ISO standards – 500.000+ pieces in stock, certified and ready to ship.

01Stud boltsCut, chamfered and marked in-houseDIN 975 / 976 / 938 / 939 / 2510 · ASME B18.31.2→02Hex nutsHeavy hex to lock nuts, every gradeASME B18.2.2 · DIN 934 / ISO 4032 · DIN 980 / 985→03Hex boltsASTM / ASME and DIN / ISO gradesDIN 931 / 933 · ISO 4014 / 4017 · ASME B18.2.1→04Socket head cap screwsMetric and inch, 12.9 to A4-80DIN 912 / ISO 4762 · DIN 7991 · ASME B18.3→05WashersPlain, spring, structural and taperDIN 125 / 127 / 6916 / 9021 / 434 · ASTM F436→06Dowel pinsUnhardened and hardened, from Ø 1 mmISO 2338 / DIN 7 · ISO 8734 / DIN 6325 · EPK up to Ø 12→07Header plugs & plug gasketsMatched sets for air-cooled heat exchangersHeader plugs · double plugs · UNF · A105 to Alloy 925→08GasketsSealing for every flanged jointSpiral wound · ring joint · metal jacketed · graphite→09Engineered & tailor-madeDesigned in-house in 3D CADMade to your drawing or specification→

Popular choices

What our customers order most.

01Stainless A2 / A4Hex nuts, hex bolts, socket head cap screws and washers in A2-70, A4-70 and A4-80 – metric from M1.6.

Socket screws →Hex nuts →Washers →

02B7 / 2H stud bolt setsStud bolts in ASTM A193 B7 with A194 2H heavy hex nuts, cut and marked in-house – inch or metric.

Configure stud bolts →

03Coated for corrosionZinc plated, PTFE / Xylan, TAKECOAT-1000 or hot-dip galvanized – on bolts, studs and nuts.

All coatings →Hex bolts B7 / 42CrMo4 →

What sets us apart

Three capabilities. One source.

Made in the Netherlands

Stud bolts, made in-house.

Cut, chamfered and laser or dot-pin marked in our own production facility in the Netherlands. Capacity: 2.000 stud bolts per day.

Stud bolts →

Exclusive in Europe

TAKECOAT-1000

The only authorized supplier in Europe. Rated for at least 6.000 hours before red rust.

TAKECOAT-1000Xylan 1070Xylan 1424Geomet-500HDG

Coatings →

Cleanroom & semiconductor

Clean down to the last particle.

A4 stainless, EPK-treated, Gr. 2 or Gr. 4 cleaned for ISO class 5–7, vacuum-packed per 5, 10, 25 or 50.

Cleanroom parts →

From parts list to delivery

A quote in 24 hours. Delivery from stock in 24 hours.

01Send your parts listUpload Excel, CSV or PDF, or type the lines.
02Same-day confirmationWith the name of who handles your request.
03Quote within 24 hoursStock items quoted with 24-hour delivery.
04Certified deliveryEN 10204 3.1 / 3.2, traceable to the heat number.

Traceable

Quality you can trace.

Every stud bolt carries its grade, heat number and manufacturer's symbol – permanently marked and traceable to its EN 10204 3.1 / 3.2 certificate. Quality you can audit, on every joint, in every country.