Clean down to the last particle.
100.000+ EPK parts in stock: socket head cap screws, hex nuts, washers and dowel pins in A4 stainless – cleaned to Grade 2 or Grade 4 for ISO class 5–7 cleanrooms, vacuum-packed and delivered in 3–4 weeks, cleaning included.
3–4 weeks. Cleaning included.
Cleaned cleanroom parts commonly take 10–12 weeks. We keep 100.000+ EPK-treated parts in stock, so only the cleaning and packing remain – your parts arrive in 3–4 weeks, cleaned to Grade 2 or Grade 4, vacuum-packed, with cleanliness certificate and lot traceability.
- 100.000+ EPK parts in stock
- M1.6 to M12 in A2 and A4
- Cleaning and vacuum packing included
Every part of the assembly.
A2 and A4 stainless from M1.6 to M12 (dowel pins Ø 1 to Ø 12), EPK-treated, cleaned to Grade 2 or Grade 4 and vacuum-packed per 5, 10, 25, 50 or 100 pieces – ready to install. Also in A1 and titanium Grade 2, 4 and 5 on request.
Grade 2 or Grade 4 – cleaned to your spec.
Two cleanliness levels from the Generic Standard of ASML (GSA), the reference for the semiconductor supply chain. Every part is cleaned to the grade you specify, vacuum-packed and shipped with a cleanliness certificate.
The stricter of the two. Tight limits on particles and molecular contamination, with clean handling from production through packing – no bare-hand contact, approved lubricants only.
Typical use: vacuum and in-machine semiconductor parts
Grade 2 cleaning →The standard cleanroom level. Parts are free of visible contamination and larger particles, cleaned and packed so they stay clean until assembly.
Typical use: cleanroom assembly outside the most critical zones
Grade 4 cleaning →Have your own parts cleaned.
Send us your own stainless steel or titanium parts and we clean them to Grade 2 or Grade 4, vacuum-pack them and return them with a cleanliness certificate – in 2–3 weeks.
- FastenersYour bolts, nuts, washers and pins
- Turned and milled partsMachined parts made to your drawing
- Stainless steel and titaniumThe materials we clean
- EPK on requestElectropolished and Kolsterised before cleaning
With EPK treatment, the lead time is confirmed with your quote.
Request cleaning of your parts →Five steps. Ready to install.
- 01A4 stainlessDIN / ISO parts in AISI 316
- 02ElectropolishingSmooth, passive surface that holds fewer particles
- 03Kolsterising900–1300 HV surface: no galling, corrosion resistance kept
- 04Grade 2 / Grade 4 cleanPrecision cleaned for ISO class 5–7
- 05Vacuum-packedPer 5, 10, 25, 50 or 100 pieces
EPK from stock.
We keep EPK-treated A4 parts in stock, so Grade 2 or Grade 4 cleaning and vacuum packing start as soon as you order – no waiting for electropolishing and Kolsterising.
Certified clean, lot by lot.
Every pack ships with a cleanliness certificate and full lot traceability – under an ISO 9001:2015 quality system.
- 01Within 24 hoursTerry confirms your request and checks grade, material and sizes.
- 02Your quotePrice per pack and lead time – 100.000+ EPK parts in stock, delivered in 3–4 weeks including cleaning.
- 03Cleaned and packedGrade 2 or Grade 4 cleaning, vacuum-packed, with cleanliness certificate and lot traceability.
Cleanroom fasteners – frequently asked questions.
- What does EPK mean for cleanroom fasteners?
- EPK is the HBS finish for cleanroom use: A4 stainless steel (AISI 316) parts that are electropolishing, kolsterising, grade 2 / grade 4 clean and vacuum-packed. Smooth, passive surface that holds fewer particles; 900–1300 hv surface: no galling, corrosion resistance kept.
- What is the difference between Grade 2 and Grade 4 cleaning?
- Grade 2 is the stricter level: Tight limits on particles and molecular contamination, with clean handling from production through packing – no bare-hand contact, approved lubricants only. Typical use: vacuum and in-machine semiconductor parts. Grade 4 is the standard cleanroom level: The standard cleanroom level. Parts are free of visible contamination and larger particles, cleaned and packed so they stay clean until assembly. Typical use: cleanroom assembly outside the most critical zones.
- For which cleanroom classes are EPK parts suitable?
- Both grades are cleaned for ISO class 5–7 cleanrooms. Parts are vacuum-packed per 5, 10, 25, 50 or 100, delivered with a cleanliness certificate and lot traceability.
- Which fasteners does HBS supply EPK-treated?
- socket head cap screws, hex nuts, washers, dowel pins and engineered parts: DIN 912 / ISO 4762 · countersunk DIN 7991; DIN 934 / ISO 4032 · ISO 4035 thin nuts; DIN 125 · DIN 9021 · DIN 433; ISO 2338 · ISO 8734. Engineered parts are made to your drawing with the same cleaning and vacuum packing.
- Can HBS clean parts I supply myself?
- Yes. Send us your own fasteners or turned and milled parts in stainless steel or titanium: we clean them to Grade 2 or Grade 4, vacuum-pack them and return them with a cleanliness certificate in 2–3 weeks. Electropolishing and Kolsterising (EPK) on request, with the lead time confirmed in your quote.
- How fast can I get a quote for cleanroom fasteners?
- Send the cleanroom quote form or your drawing and Terry replies within 24 hours with price per pack, cleaning grade and lead time. 100.000+ EPK-treated parts are kept in stock.
- How long does delivery of cleaned EPK parts take?
- 3–4 weeks, Grade 2 or Grade 4 cleaning and vacuum packing included. Because 100.000+ EPK-treated parts are kept in stock, only the cleaning remains – cleaned cleanroom parts commonly take 10–12 weeks.
YOUR CONTACTTalk to TerrySales Engineer