Skip to content
ALBERTA-BASED · Serving customers across Western Canadasales@northcore.parts
8M-4991 Qty 8: O-Ring Seal – Fits Caterpillar

NC-004994 · O-Rings, Bearings, Gaskets & Seals

8M-4991 Qty 8: O-Ring Seal – Fits Caterpillar

CAD 9.85

In stock

Qty 8: O-Ring Seal – reference 8M-4991. Catalogue-listed applications: Caterpillar 8S, 977A, 1673B, 1693, 1674, D334, D333A. Width: 38.1 mm; Depth: 6.096 mm. View photos, specifications, CAD pricing and delivery options from NorthCore.

Standard delivery: 3–7 business days. Other services and estimates are shown at checkout. Minimum online order: CAD 100 in parts, excluding shipping and tax. Add this part to your cart to calculate delivery and review your order.

Ask about this part

Part specifications and references

NorthCore code
NC-004994
Reference numbers
8M-4991
Listed package quantity
8
Width
38.1 mm
Depth
6.096 mm
Product information and configuration
Quantity indicated in catalogue: 8

Replacement part: Qty 8: O-Ring Seal Fits Caterpillar 12E 16 1673B 1674 1693 183B 3304. 

Configuration: Qty 8: O-Ring Seal
Specifications:
-Width: 1.50"
-Depth: 0.24"
Fits Caterpillar:
Bulldozer Models: 8S, 977A
Replaces Part Number(s): 8M-4991,8M4991
Engines Models: 1673B, 1693, 1674, D334, D333A, D333B, D333C, 3304, 3306, 3304B, D379A, D379B, D399, D349, D346, D348, D398A, D398B, D330C, D343, 3406, D320A, D398, D379, G343, G398, G399, G379A, G379
Replaces Part Number(s): 8M-4991,8M4991
Generator Models: SR4
Replaces Part Number(s): 8M-4991,8M4991
Hydraulic Control Models: 183B
Replaces Part Number(s): 8M-4991,8M4991
Landfill Compactor Models: 826B
Replaces Part Number(s): 8M-4991,8M4991
Motor Grader Models: 16, 12E
Replaces Part Number(s): 8M-4991,8M4991
Other (Truck) Models: 769, 773, 777, 769B
Replaces Part Number(s): 8M-4991,8M4991
Pipelayer Models: 583K, 561B
Replaces Part Number(s): 8M-4991,8M4991
Ripper Models: 8D
Replaces Part Number(s): 8M-4991,8M4991
Scraper Models: 666, 666B, 657, 657B
Replaces Part Number(s): 8M-4991,8M4991
Soil Compactor Models: 825B
Replaces Part Number(s): 8M-4991,8M4991
Track Loader Models: 977H, 977K, 963, 973, 963B, 983
Replaces Part Number(s): 8M-4991,8M4991
Track-Type Tractor Models: D8K
Replaces Part Number(s): 8M-4991,8M4991
Tractor Models: 772, 776, 768B
Replaces Part Number(s): 8M-4991,8M4991
Tractor Loader Models: 977K
Replaces Part Number(s): 8M-4991,8M4991
Vibratory Compactor Models: CB-534
Replaces Part Number(s): 8M-4991,8M4991
Wheel Dozer Models: 834, 824B, 824
Replaces Part Number(s): 8M-4991,8M4991
Wheel Loader Models: 988
Replaces Part Number(s): 8M-4991,8M4991
Wheel Tractor Models: 627, 621, 623, 637, 631C, 641, 633C, 651, 657
Replaces Part Number(s): 8M-4991,8M4991

Reference numbers: 8M-4991

Catalogue-listed applications

Use these as reference information. Check the part numbers, specifications and any application restrictions against your equipment.

  • Caterpillar 8S
  • Caterpillar 977A
  • Caterpillar 1673B
  • Caterpillar 1693
  • Caterpillar 1674
  • Caterpillar D334
  • Caterpillar D333A
  • Caterpillar D333B
  • Caterpillar D333C
  • Caterpillar 3304
  • Caterpillar 3306
  • Caterpillar 3304B
  • Caterpillar D379A
  • Caterpillar D379B
  • Caterpillar D399
  • Caterpillar D349
  • Caterpillar D346
  • Caterpillar D348
  • Caterpillar D398A
  • Caterpillar D398B
  • Caterpillar D330C
  • Caterpillar D343
  • Caterpillar 3406
  • Caterpillar D320A
  • Caterpillar D398
  • Caterpillar D379
  • Caterpillar G343
  • Caterpillar G398
  • Caterpillar G399
  • Caterpillar G379A
  • Caterpillar G379
  • Caterpillar SR4
  • Caterpillar 183B
  • Caterpillar 826B
  • Caterpillar 16
  • Caterpillar 12E
  • Caterpillar 769
  • Caterpillar 773
  • Caterpillar 777
  • Caterpillar 769B
  • Caterpillar 583K
  • Caterpillar 561B
  • Caterpillar 8D
  • Caterpillar 666
  • Caterpillar 666B
  • Caterpillar 657
  • Caterpillar 657B
  • Caterpillar 825B
  • Caterpillar 977H
  • Caterpillar 977K
  • Caterpillar 963
  • Caterpillar 973
  • Caterpillar 963B
  • Caterpillar 983
  • Caterpillar D8K
  • Caterpillar 772
  • Caterpillar 776
  • Caterpillar 768B
  • Caterpillar CB-534
  • Caterpillar 834
  • Caterpillar 824B
  • Caterpillar 824
  • Caterpillar 988
  • Caterpillar 627
  • Caterpillar 621
  • Caterpillar 623
  • Caterpillar 637
  • Caterpillar 631C
  • Caterpillar 641
  • Caterpillar 633C
  • Caterpillar 651
Application notes
  • Aftermarket Qty 8: O-Ring Seal

Browse related parts

Other listings with this reference

These are separate offers. Compare each listing’s specifications, package details and price.

NORTHCORE EQUIPMENT SUPPLY

Search the parts catalogue

Browse equipment parts, compare prices and order online. By part number · By category · By equipment make

Prices in CADDelivery across Canada

Minimum parts order: CAD 100 · Shipping and taxes calculated at checkout

THE CATALOGUE

All parts

Loading parts…

MORE THAN A CATALOGUE

Can’t see the part you need?

Tell us what you’re looking for. We’ll work on finding it.

Part details
Shipping and taxes calculated at checkout.Minimum online order: CAD 100 in parts.

Choose your part using the listed numbers and specifications. Availability, shipping and taxes are checked at checkout.

Listed applications
Your parts cart

Your parts cart

Your cart is saved on this device for 30 days. Prices and availability are checked again when you order.

Review your parts and quantities, then continue to delivery and payment.

Delivery and applicable taxes are calculated at checkout.

Need help with this order? Send an enquiry

Send a parts enquiry

Send your request directly to NorthCore. Your selected parts and quantities are included automatically. Machine details are optional.

For kits and packs, tell us the number of units or packs needed. We’ll confirm exactly what is included.

We’ll reply by email. Sending this enquiry does not create an order or take payment.

By sending, you ask NorthCore to contact you about this enquiry. Your details are processed through Formspree, which may process information outside Canada. No marketing signup. Privacy Notice.
PARTS SOURCING

WE CAN HELP

Can’t find your part?

Send us the part number or a description. Our team will look for options and reply by email.

Parts request

Tell us what you need. Only three fields are required (*). Send your request here — no email app needed.

Add machine & company details (optional)
Have photos or a nameplate?
Email them to sales@northcore.parts using the same name and part details. This form sends text only.

We’ll review your details and reply by email. No order or payment is created.

By sending, you ask us to contact you about this enquiry. Your details are processed through Formspree, which may process information outside Canada. No marketing signup. Read our Privacy Notice (new tab) and Terms & Ordering (new tab).