O.S Seals supplies industrial fasteners alongside our rubber sealing products, so buyers assembling machines or repairing equipment can source bolts, screws, nuts, and washers from the same supplier as the seals that go with them.
The fastener range covers the common standards used with our sealing and coupling products, in carbon steel and stainless steel.
Products We Supply
- Bolts and screws: hex bolts, socket head cap screws, machine screws
- Nuts: hex nuts, lock nuts, flange nuts
- Washers: flat washers, lock washers, and sealing washers, see also our rubber gaskets and washers
- Retaining hardware: see our retaining rings and circlips page
- Custom requests: special lengths, finishes, and materials per quotation
Why Source Fasteners with Your Seals
- One shipment and one customs process for the parts list of one machine
- Matched materials: stainless fasteners with stainless-friendly seal selections
- Simpler ordering for maintenance teams already ordering seals
Materials and Finishes
- Carbon steel: standard grades with zinc or black oxide finish
- Stainless steel: 304 and 316 for corrosion exposure
- Special alloys and finishes: confirmed per application
Matching Fasteners to Sealing Points
Where a fastener passes through or presses on a sealing element, the pairing matters: a sealing washer under a bolt head needs the correct washer hardness and bolt grade so the rubber is compressed without being crushed, and a bonded seal on a hydraulic fitting needs the thread size matched to the seal diameter rather than tightened to compensate.
When you send a parts list that includes both fasteners and sealing parts, we check the pairing at the sealing points and flag mismatches before quoting, which avoids rework on the machine later.
What to Send Us for a Quotation
- Fastener list: type, size, standard, and quantity per item
- Material and finish requirement
- Whether fasteners ship together with seals from the same order
- Repeat demand and reorder cycle
Frequently Asked Questions
What is the minimum order for fasteners?
Fasteners usually ship together with a sealing order. Send your list and we confirm the arrangement.
Can you match DIN, ISO, or ANSI standards?
Yes, send the standard and dimension and we confirm availability.
Request a Quote for Fasteners
Send your fastener list, and we will confirm material, finish, and price.