90 Shore A NBR Rubber O Rings Metric Custom Sizes 3 mm Cross Section Bulk Bag Packed for Hydraulic Seal

90 Shore A NBR Rubber O Rings — Metric Sizes, Bulk Bag Packed

Single specification, single size, bulk packed. These nitrile O rings are produced to your metric dimension list, de-flashed, lot tested and filled straight into PE bags and export cartons, so there is no inner box, no size chart and no extra packing cost per piece. Ideal for assembly lines and distributors who order one size in volume.

Application Scenarios

• Hydraulic cylinders and valves: piston, rod and gland sealing on 10-25 MPa oil circuits.
• Pneumatic systems: cylinder end caps, solenoid valves, quick couplers, fittings.
• Automotive repair: fuel lines, power steering, gearbox, oil cooler seals.
• Industrial pumps and pipework: water, oil and mild chemical flange sealing.
• Assembly line consumption: bulk feed for automated press fit and manual build stations.
• Distributor stock: high runner sizes ordered by the thousand with fast repeat supply.

Simple Parameter Table

Quality Assurance

• Compound batch traceable, tensile strength and elongation tested per lot.
• 100% visual inspection for flash, bubbles and dimensional defects.
• Sampling of hardness, CS and ID on every lot against ISO 3601-3.
• Air tightness and compression set reports issued with each shipment.
• ISO 9001:2015 certified plant, RoHS and REACH declarations on request.
• Free pre-production samples, retained reference samples kept for 24 months.

Packaging Standard

• Default packing is a clear PE bag with a label showing size, hardness, quantity and lot code.
• Bags are filled directly into a 5-layer export carton, no inner box, no divider, no size chart.
• Standard fill is 1,000 pcs per bag and 10,000 to 25,000 pcs per carton depending on size.
• Carton marking includes item code, quantity, gross weight, dimensions and origin.
• Optional neutral white bag, printed logo bag or vacuum bag at no tooling cost.
• Pallets shrink wrapped and strapped for sea freight, cartons accepted for air freight.

After-Sales Service

• Reply within 12 working hours for technical and quality questions.
• 24 months warranty on material and workmanship under normal service.
• Free replacement or refund for confirmed dimensional or hardness deviation.
• Engineer support for seal selection, groove design and compound upgrade.
• Replacement rings shipped by air within 3 working days if shortage occurs.

Factory Scale

• 12,000 sqm production base with 36 compression and injection moulding presses.
• Monthly capacity of 5 million O rings across 900 stock moulds.
• In-house compound mixing, tooling workshop, deflashing and automated inspection.
• 260 skilled workers, 14 QC inspectors and 6 R&D engineers.
• 15 years of rubber sealing export experience serving buyers in 60 countries.

FAQ

Q1. Can I order just one size in large quantity?
Yes. Single size bulk orders are our standard mode, no mixed kit needed.

Q2. What is the MOQ?
5,000 pieces per size for stock moulds, 10,000 pieces for a custom size.

Q3. How is it packed?
PE bag inner and export carton outer, no inner box, to keep unit cost and freight volume low.

Q4. Can you print our label on the bag?
Yes. Logo bag printing is free of tooling cost from 20,000 pieces.

Q5. Do you have stock for fast delivery?
Over 900 stock moulds, common sizes ship in 3 working days.

Q6. What payment terms do you accept?
T/T 30% deposit with balance against B/L copy, L/C at sight accepted.

Send your size list with quantity and we will quote bulk bag pricing within one working day.