NBR O-ring · BS1806-428 size reference
O-Ring 123.20 × 6.99 mm · NBR · 70A
- ID123.20 mm4.850 in
- CS6.99 mm0.275 in
- MaterialNBR
- Hardness70 Shore A
OXXRING SKU OXX-OR-123P2-6P99-NBR-70A-P10
Same size, other grades
Compare every grade at this size →$1.97 per piece
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Standard items: returns per our Refund Policy. Custom items are made to order.
Specifications
| Inside diameter (ID) | 123.20 mm · 4.850 in |
|---|---|
| Cross section (CS) | 6.99 mm · 0.275 in |
| Material family | NBR |
| Hardness | 70 Shore A |
| Size reference | BS1806-428 |
| OXXRING SKU | OXX-OR-123P2-6P99-NBR-70A-P10 |
| Ordering | Buy online |
Check this size for your application
Free engineering tools, already filled in with 123.20 × 6.99 mm NBR.
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 |
|---|---|---|---|---|---|
| 123.20 × 6.99 mm4.850 × 0.275 in | FKM 80A | BS1806-428 | $31.66 / 4 pcs $7.92 / pc | Available to order | Choose pack |
| 123.20 × 6.99 mm4.850 × 0.275 in | EPDM 70A | BS1806-428 | $22.33 / 10 pcs $2.23 / pc | Available to order | Choose pack |
| 123.20 × 6.99 mm4.850 × 0.275 in | Silicone 70A | BS1806-428 | $49.82 / 10 pcs $4.98 / pc | Available to order | Choose pack |
| 123.20 × 6.99 mm4.850 × 0.275 in | FFKM 80A | BS1806-428 | $451.91 / pc $451.91 / 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.
NBR material notes
Usually a good starting point for
Mineral oils, many fuels, hydraulic fluids and aliphatic-hydrocarbon service.
Review before use with
Review ozone/weathering, flex fuels, aromatic or chlorinated hydrocarbons, ketones, esters, polar solvents, glycol brake fluid and strong acids.
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 123.20 × 6.99 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.