FFKM O-ring · BS1806-834 size reference
O-Ring 55.56 × 3.53 mm · FFKM · 75A
- ID55.56 mm2.187 in
- CS3.53 mm0.139 in
- MaterialFFKM
- Hardness75 Shore A
OXXRING SKU OXX-OR-55P56-3P53-FFKM-75A-P3
Same size, other grades
Compare every grade at this size →$46.50 per piece
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Standard items: returns per our Refund Policy. Custom items are made to order.
Specifications
| Inside diameter (ID) | 55.56 mm · 2.187 in |
|---|---|
| Cross section (CS) | 3.53 mm · 0.139 in |
| Material family | FFKM |
| Hardness | 75 Shore A |
| Size reference | BS1806-834 |
| OXXRING SKU | OXX-OR-55P56-3P53-FFKM-75A-P3 |
| Ordering | Buy online |
Check this size for your application
Free engineering tools, already filled in with 55.56 × 3.53 mm FFKM.
Same size, other materials and hardness
Identical nominal ID × CS. Material and hardness change suitability; check the fluid and temperature before switching.
| Size | Material | Size reference | Smallest pack | Ordering | Action |
|---|---|---|---|---|---|
| 55.56 × 3.53 mm2.187 × 0.139 in | NBR 70A | BS1806-834 | $26.23 / 10 pcs $2.62 / pc | Available to order | Choose pack |
| 55.56 × 3.53 mm2.187 × 0.139 in | FKM 80A | BS1806-834 | $22.85 / 10 pcs $2.29 / pc | Available to order | Choose pack |
| 55.56 × 3.53 mm2.187 × 0.139 in | EPDM 70A | BS1806-834 | $63.34 / 10 pcs $6.33 / pc | Available to order | Choose pack |
| 55.56 × 3.53 mm2.187 × 0.139 in | Silicone 70A | BS1806-834 | $16.01 / 10 pcs $1.60 / pc | Available to order | Choose pack |
Nearby listed sizes
For comparison only. A nearby size is not an equivalent; confirm the gland dimensions or ask for a review before substituting.
FFKM material notes
Usually a good starting point for
Broad chemical-service screening including aromatic/chlorinated hydrocarbons, ketones, esters, ethers, polar solvents, organic acids, steam and vacuum.
Review before use with
Fluorinated refrigerants and temperature-critical service require exact-compound review.
Family-level screening, not an approval of a specific compound. Screen a chemical or ask for a material check.
Questions about this O-ring
How do I confirm this is the right size?
Measure the inside diameter and the cross section of the ring you are replacing, or read them from the drawing. This listing is 55.56 × 3.53 mm. For a used ring, measure in several places; wear and swelling change the dimensions. Measurement guide
How is the price calculated?
The price shown is the total for one pack. The per-piece price is shown beside it for comparison. Choose how many packs you need; taxes and shipping are calculated at checkout.
Can I order a quantity that is not in the pack list?
Yes. Order several packs, or request a quote for larger or scheduled quantities.
Is the size reference a certification?
No. A size reference such as AS568 or ISO 3601 describes nominal dimensions. It does not certify the compound or approve the part for a specific application.