Description: Cat® fastener parts are designed for specific applications based on size, strength, clamp load, and past performance. This is information other manufacturers do not have. They are selected to last until rebuild or the life of the machine. While it may seem as though non-Cat hardware and fasteners are suitable for your machine, no other company knows your equipment like we do.
Attributes: •Cat Fasteners are manufactured to precise specifications and are built for durability, reliability, productivity •Strength & Quality – Fasteners meet or exceed ISO, ASTM, ASME & SAE requirements. •Cat bolts, nuts, and washers are designed to work together as a system for maximum clamping force. •Coatings that meet special requirements for different applications (RoHS compliant).
Applications: Cat bolts and the matching washers and nuts form a performance based system which produces consistently high clamp loads. You can trust Cat Fasteners to help you build it, maintain it, or fix it - for most machine and workshop applications throughout the world.
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Warning:This product can expose you to chemicals including Lead and lead compounds, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications for part number 1A-5666
Units of Measure
USMetric
Material: STEEL,Alloy Zinc,Carbon Steel
Thickness (mm): 19.05
Thickness (in): 0.75
Height (in): 0.75
Nut Type: Hex
Drive (in): 1.313
Thread Size (in - TPI) (in): 7/8-14
Material Description: 20+% stronger than SAE J995 Grade 8
Coating: Zinc Phosphate + Oil
Hand of Thread: RH
Thread Size (mm): .875
Class or Grade: Cat/SAE J995 Grade 8+ (170 ksi)
Hardened: Yes
Nut Width - 3 (in): 1 5/16
Thread: Fine Thread UNF
Hole Thread Pitch: 14
Thread Size (dia x pitch) (mm): 7/8x14
Drive (mm): 33.34
Finish: Phosphate and Oil Coated
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Compatible Models for part number 1A-5666
UNDERGROUND ART TRUCK
AE40 AD40
TRUCK ENGINE
1693
WHEEL TRACTOR
621 650B 651B 631C 660B 633C 657E 657B 641B 666B
HYDRAULIC CONTROL
183B
VEHICULAR ENGINE
D346 D348
TRACK LOADER
955H 983
SOIL COMPACTOR
825B
WHEEL DOZER
834 824B
WHEEL LOADER
992B 980 988 992
TRACK-TYPE TRACTOR
D5 D8K D8H D4D D4E D4E SR D10
GEN SET ENGINE
3508 3512 3516
ARTICULATED TRUCK
D250E
MARINE ENGINE
D349 D346 D348 D342C D342 D343
RIPPER
8D 951 10 4
PIPELAYER
572G 583H
INDUSTRIAL ENGINE
D342 D343 D348 D349 D346 D342C
TRUCK
769 773 777 769B 777F
WHEEL SCRAPER
615 666 666B 623F 623E 657 657B
GAS ENGINE
G342C
TRACTOR
772 776
BULLDOZER
8S 10C 10S 10U 4A
VIBRATORY COMPACTOR
CP-433C CS-433C
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 1A-5666
View Detailed Parts Diagrams
Add Your Equipment
Description for part number 1A-5666
Description: Cat® fastener parts are designed for specific applications based on size, strength, clamp load, and past performance. This is information other manufacturers do not have. They are selected to last until rebuild or the life of the machine. While it may seem as though non-Cat hardware and fasteners are suitable for your machine, no other company knows your equipment like we do.
Attributes: •Cat Fasteners are manufactured to precise specifications and are built for durability, reliability, productivity •Strength & Quality – Fasteners meet or exceed ISO, ASTM, ASME & SAE requirements. •Cat bolts, nuts, and washers are designed to work together as a system for maximum clamping force. •Coatings that meet special requirements for different applications (RoHS compliant).
Applications: Cat bolts and the matching washers and nuts form a performance based system which produces consistently high clamp loads. You can trust Cat Fasteners to help you build it, maintain it, or fix it - for most machine and workshop applications throughout the world.
View More
Warning:This product can expose you to chemicals including Lead and lead compounds, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications for part number 1A-5666
Units of Measure
USMetric
Material: STEEL,Alloy Zinc,Carbon Steel
Thickness (mm): 19.05
Thickness (in): 0.75
Height (in): 0.75
Nut Type: Hex
Drive (in): 1.313
Thread Size (in - TPI) (in): 7/8-14
Material Description: 20+% stronger than SAE J995 Grade 8
Coating: Zinc Phosphate + Oil
Hand of Thread: RH
Thread Size (mm): .875
Class or Grade: Cat/SAE J995 Grade 8+ (170 ksi)
Hardened: Yes
Nut Width - 3 (in): 1 5/16
Thread: Fine Thread UNF
Hole Thread Pitch: 14
Thread Size (dia x pitch) (mm): 7/8x14
Drive (mm): 33.34
Finish: Phosphate and Oil Coated
View More
Compatible Models for part number 1A-5666
UNDERGROUND ART TRUCK
AE40 AD40
TRUCK ENGINE
1693
WHEEL TRACTOR
621 650B 651B 631C 660B 633C 657E 657B 641B 666B
HYDRAULIC CONTROL
183B
VEHICULAR ENGINE
D346 D348
TRACK LOADER
955H 983
SOIL COMPACTOR
825B
WHEEL DOZER
834 824B
WHEEL LOADER
992B 980 988 992
TRACK-TYPE TRACTOR
D5 D8K D8H D4D D4E D4E SR D10
GEN SET ENGINE
3508 3512 3516
ARTICULATED TRUCK
D250E
MARINE ENGINE
D349 D346 D348 D342C D342 D343
RIPPER
8D 951 10 4
PIPELAYER
572G 583H
INDUSTRIAL ENGINE
D342 D343 D348 D349 D346 D342C
TRUCK
769 773 777 769B 777F
WHEEL SCRAPER
615 666 666B 623F 623E 657 657B
GAS ENGINE
G342C
TRACTOR
772 776
BULLDOZER
8S 10C 10S 10U 4A
VIBRATORY COMPACTOR
CP-433C CS-433C
View More
KeyKey
Factory Fit
This part is designed to fit your Cat equipment based on the manufacturer’s specifications.
Any changes to the manufacturer’s configuration might result in the product not fitting your Cat equipment. Please consult your Cat Dealer before purchasing to ensure that this part is appropriate for your Cat equipment in its current condition and assumed configuration. This indicator cannot guarantee compatibility for all parts.
Remanufactured
Non-Returnable
Kit
Replaced
Remanufactured
Non-Returnable
Kit
Replaced
Will it fit or looking for a repair?Add your equipment to see if this part fits or if there are repair options available.
Warranty Information
Warranty Information
Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
Need More Help? Contact Us
Find a DealerEmail
Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
Need More Help? Contact Us
Find a DealerEmail
Chat with an expert
Warranty Information
Warranty Information
Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
Need More Help? Contact Us
Find a DealerEmail
Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
