Bulk supply · Africa
Washers
Flat, spring, taper and hardened structural washers supplied in bulk and matched to the bolt package, in plain, zinc plated, hot-dip galvanised and stainless finishes.
- FLAT AND SPRING
- STRUCTURAL HARDENED
- HOT-DIP GALVANISED OPTION
Also searched as: flat washers · spring washers · structural washers · penny washers
What buyers need to know
Specifying washers.
Washers are the line buyers forget until the site calls. They are cheap per piece and worthless when missing — a bolt package that lands without its washers stops the crew as effectively as one with no nuts. Every bolt quotation we issue includes the matched washer count so the shipment is complete.
Function drives the type. Flat washers spread load over soft or oversized-hole material. Hardened structural washers (to EN 14399-6 or ASTM F436) are mandatory under high-strength bolt heads and nuts because a soft washer bites in and loses pre-load. Spring and serrated washers resist loosening under vibration on plant and conveyors. Square taper washers correct the flange angle on channel and I-section steelwork.
Finish must match the bolt. A zinc plated washer under a hot-dip galvanised bolt becomes the sacrificial component and rusts first, staining the connection and worrying the client. We supply the washer in the same finish and the same standard as the fastener it serves.
Specification
Full specification table.
| Standards | DIN 125, DIN 126, DIN 127, DIN 434/436, EN 14399-6, ASTM F436 |
|---|---|
| Types | Flat, heavy flat, hardened structural, spring, serrated, taper, dome, penny |
| Sizes | M5 to M42 · 3/16" to 1-1/2" |
| Materials | Mild steel, hardened carbon steel, stainless 304 / 316, nylon |
| Finishes | Plain, zinc plated, hot-dip galvanised to ISO 1461 |
| Packing | 25 kg cartons, bulk bags, or bagged into bolt kits |
| Documentation | Hardness and dimension reports on structural washers |
Types we stock and source
Variants on one enquiry.
Flat washers (DIN 125)
General load spreading under nut or head.
Penny / repair washers
Large outside diameter for thin sheet and timber.
Hardened structural washers
Required under 8.8 and 10.9 pre-tensioned bolts.
Spring washers (DIN 127)
Split section resisting vibration loosening.
Serrated / shakeproof
Internal or external teeth biting into the joint face.
Square taper washers
8 or 14 degree taper for channel and I-beam flanges.
Coating by exposure
Which finish for which African site.
- Match the bolt
- Same finish as the fastener or the washer corrodes first.
- Coastal
- Hot-dip galvanised or stainless A4; never plain steel.
- Galvanic separation
- Nylon and insulating washers where dissimilar metals meet.
- Vibration
- Serrated or wedge-lock in place of plain spring on plant.
Typical order sizes
What a real enquiry looks like.
- Washer sets bagged with 2 tonnes of M16 structural bolts
- 500 kg mixed flat and spring washers for a merchant's bulk bin range
- Hardened washers to ASTM F436 for a pre-tensioned connection package
Questions
Washers FAQs.
- Do I need a hardened washer under a grade 8.8 bolt?
- Under a pre-tensioned or high-strength connection, yes. A mild steel washer indents under the head and the joint loses pre-load. Hardened structural washers to EN 14399-6 or ASTM F436 are specified for exactly this reason.
- Should the washer finish match the bolt finish?
- Always. A plated washer paired with a hot-dip galvanised bolt corrodes preferentially and stains the connection. We supply matched finishes as standard.
- Can washers be pre-bagged with the bolts and nuts?
- Yes. Kitting bolt, nut and washer per assembly is one of our standard services and removes counting and sorting on site.
Where we ship it
Washers by country.
“Africa buys fasteners on .net”