Hercules O Ring Kits

Hercules o ring kits cover the aftermarket sealing side of hydraulic and pneumatic cylinder repair, from Hercules Sealing Products' 568 Series O-Ring Kits and metric assortments to FKM/PTFE compounds for higher-temperature service. Hercules has built seals and seal kits for heavy-equipment repair since 1962 across construction, mining, agriculture, refuse, and material handling, and its o-rings are interchangeable across OEM platforms like Caterpillar, Case, Komatsu, and Bobcat. If you only have a worn ring, a bore diameter, or an obsolete OEM number to work from, request a cross-reference quote and we will match it to a Hercules equivalent.

Which O Ring Kits Is Right for the Job?

This category covers Hercules o-ring kits as a single assortment line, so selection comes down to confirming fit rather than choosing between siblings. Identify the o-ring by three dimensions — inside diameter, cross-section (thickness), and the AS568 dash size where applicable — then match the compound to the duty. Nitrile (Buna-N) suits standard hydraulic oil and general service; FKM/PTFE rings hold up to higher temperatures and aggressive fluids; metric kits cover imported and European-spec cylinders that do not follow the AS568 standard. When you are rebuilding a full cylinder rather than replacing a single ring, pair the o-ring kit with the matching Hercules cylinder repair kit for that bore and rod size. If a ring is too distorted to measure, send the OEM cylinder or seal number and we will confirm the right kit.

Cross-Referencing Hercules Sealing Products O Ring Kits

The cross-reference is where Hercules earns its place on a repair bench. Because Hercules seals are aftermarket parts engineered to interchange across multiple OEM equipment brands, a single Hercules o-ring kit often replaces dimensionally identical rings carried under Caterpillar, Case, Komatsu, or Bobcat part numbers — frequently at a lower cost than the OEM line, and often available when the original number has been superseded or discontinued. We cross-reference Hercules' aftermarket o-ring kits against the OEM number, dash size, or physical ring you have on hand, so an obsolete or hard-to-source seal becomes a stocked equivalent instead of a dead end. Send the number or the measurements and request a cross-reference quote.

9 Hercules O Ring Kits models · from $35.00 · all in stock

Trusted since 1963

Genuine Hercules products

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(800) 823-4937

Showing all 9 models

All 9 Hercules O Ring Kits models & pricestap to compare every model

Model	Product	Price	Availability
900 BOSS KIT	Deluxe Boss Seal O-Ring Kit	$45.00	In stock
568FC	Fluorocarbon O-Ring Seal Kit, 568 FC Kit	$207.50	In stock
O-R FITTING KIT	Hose End and Adapter Kit, O-R Fitting Kit	$134.00	In stock
MAX 1381 KIT-70A	Max O-Ring Kit, 1381	$350.00	In stock
METRIC O KIT-E	Metric O-Ring Seal Kit, European Sizes	$62.00	In stock
METRIC O KIT-J	Metric O-Ring Seal Kit, Japanese Sizes	$62.00	In stock
568 FLANGE KIT	Seal Kit: 568 Flange Kit	$35.00	In stock
568 FACE KIT	Seal Kit: 568 O-Ring Face Kit	$36.50	In stock
SFS KIT	Seal Kit: Split Flange O-Ring Seal Kit	$99.99	In stock

Hercules O Ring Kits — common questions

Are these genuine Hercules products?

Yes. Every Hercules product we list is factory-new and genuine — not aftermarket or remanufactured. Item SKUs match the manufacturer part numbers, so you can verify any model directly against Hercules documentation.

Can you help me choose the right model?

Yes — Northern Hydraulics has supplied hydraulic equipment since 1963. Call (800) 823-4937 with your application details, or send a quote request with the model you are replacing and we will cross-reference it to the right Hercules part.

Do you offer volume pricing on Hercules products?

Yes. For multi-unit or recurring orders, use the Request a Quote button — volume pricing on Hercules equipment is quoted case by case, we reply within one business day.

Hercules O Ring Kits

Which O Ring Kits Is Right for the Job?

Cross-Referencing Hercules Sealing Products O Ring Kits

Products

Deluxe Boss Seal O-Ring Kit

Max O-Ring Kit, 1381

Seal Kit: 568 O-Ring Face Kit

Metric O-Ring Seal Kit, European Sizes

Hose End and Adapter Kit, O-R Fitting Kit

Metric O-Ring Seal Kit, Japanese Sizes

Seal Kit: 568 Flange Kit

Fluorocarbon O-Ring Seal Kit, 568 FC Kit

Seal Kit: Split Flange O-Ring Seal Kit

Hercules O Ring Kits — common questions