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LOCKNUT 8T4778 - Caterpillar


8T4778 LOCKNUT Caterpillar parts 1090, 1190, 1190T, 120H, 120M, 120M 2, 1290T, 12H, 12H ES, 12M, 12M 2, 12M 3, 12M 3 AWD, 1390, 140H, 140H ES, 140M, 140M 2, 140M 3, 140M 3 AWD, 143H, 14H, 14H NA, 14M, 160H, 160H ES, 160M, 160M 2, 160...
Rating:
23
Alternative (cross code) number:
CA8T4778
8T-4778
8T4778
Caterpillar 8T4778 LOCKNUT
Weight: 0.07 pounds 0 kg.
Information:
COATING/PLATING  Zinc-Dichromate and Wax Coating 
HEX LENGTH  24  mm
HEIGHT  15.2  mm
MATERIAL  Hardened Steel - Rc C26-36 
SERRATED FACE 
STYLE  STANDARD 
THREAD SIZE  M16X2 

Buy LOCKNUT 8T4778 Caterpillar genuine, new aftermarket tractor parts with delivery
ARTICULATED TRUCK, WHEEL TRACTOR-SCRAPER,

Compare Prices: .

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$185.00

02 Oct 2025
48.5016[21.83] Pounds
US: Motor Spares Ma
9 Pack Bucket Uni-Teeth with Hardware 1324720 Replacement for Caterpillar Skid Steers 247 257 257B 262B 277 277C2 277D 287 287C2 1592953 8T4778 Vahaha
Vahaha 【OEM Part Numbers】: 1324720, 1592953, 8T4778 || 【Will Fit for Following Models】: Bucket Uni-Teeth Replacement for Caterpillar Skid Steer Loaders: 247, 257, 257B, 262B, 277, 277C2, 277D, 287, 287C2, 287B, 287D, 297, 297D, 297DHXP || 【Functions】: Multi-purpose general duty tooth with good penetration and long service life. The high hardness tooth is perfect for your high power ground engaging machines, digging hard dirt, gravel, or sand. || 【Note】: Made in quality materials, and we tested each one before shipping, so easy to install. Professional installation recommended. || 【Buy with Confidence】: Warranty for 2 years, any issue would be solved immediately, please feel free to contact us. Please carefully check the OEM part number and illustrations to make sure it is suitable for your car.
$176.00

05 Sep 2025
48.5016[21.83] Pounds
US: Motor Spares Ma
9 Pack Bucket Uni-Teeth with Hardware 1324720 Replacement for Caterpillar Skid Steers 247 257 257B 262B 277 277C2 277D 287 287C2 1592953 8T4778 Vahaha
Vahaha 【OEM Part Numbers】: 1324720, 1592953, 8T4778 || 【Will Fit for Following Models】: Bucket Uni-Teeth Replacement for Caterpillar Skid Steer Loaders: 247, 257, 257B, 262B, 277, 277C2, 277D, 287, 287C2, 287B, 287D, 297, 297D, 297DHXP || 【Functions】: Multi-purpose general duty tooth with good penetration and long service life. The high hardness tooth is perfect for your high power ground engaging machines, digging hard dirt, gravel, or sand. || 【Note】: Made in quality materials, and we tested each one before shipping, so easy to install. Professional installation recommended. || 【Buy with Confidence】: Warranty for 2 years, any issue would be solved immediately, please feel free to contact us. Please carefully check the OEM part number and illustrations to make sure it is suitable for your car.
$177.00

04 Sep 2025
48.5016[21.83] Pounds
US: Motor Spares Ma
9 Pack Bucket Uni-Teeth with Hardware 1324720 Replacement for Caterpillar Skid Steers 247 257 257B 262B 277 277C2 277D 287 287C2 1592953 8T4778 Vahaha
Vahaha 【OEM Part Numbers】: 1324720, 1592953, 8T4778 || 【Will Fit for Following Models】: Bucket Uni-Teeth Replacement for Caterpillar Skid Steer Loaders: 247, 257, 257B, 262B, 277, 277C2, 277D, 287, 287C2, 287B, 287D, 297, 297D, 297DHXP || 【Functions】: Multi-purpose general duty tooth with good penetration and long service life. The high hardness tooth is perfect for your high power ground engaging machines, digging hard dirt, gravel, or sand. || 【Note】: Made in quality materials, and we tested each one before shipping, so easy to install. Professional installation recommended. || 【Buy with Confidence】: Warranty for 2 years, any issue would be solved immediately, please feel free to contact us. Please carefully check the OEM part number and illustrations to make sure it is suitable for your car.
Number on catalog scheme: 20
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Compatible equipment models: 8T4778:

BACKHOE  BH150   BH27  
BROOM-PICKUP  BP15   BP18   BP22  
CHALLENGER  45   55  
COLD PLANER  PC3   PC6  
COMPACT WHEEL LOADER  902   904B   904H   906   906H   906H2   907H   907H2   908   908H   908H2  
EJECTOR TRUCK  740   740B   D400E II  
FORWARDER  554   564   574   574B   584  
FRONT SHOVEL  5080  
GENERATOR SET  3508   3508B   3512   3512B   3516   3516B  
GRAPPLE-LOG LOADING  GH52   GLL60  
HARVESTER HEAD  HH44 DE   HH45   HH55   HH65   HH75  
INTEGRATED TOOLCARRIER  IT24F   IT28F  
KNUCKLEBOOM LOADER  539  
LANDFILL COMPACTOR  836G   836H  
LANDSCAPE TILLER  LT13   LT13B  
MULCHING HEAD  HM825   MD-250  
PNEUMATIC COMPACTOR  PF-300C   PS-300B   PS-500  
QUARRY TRUCK  771D  
RAKE-LANDSCAPE  LR15   LR18B  
RECLAIMER MIXER  RM-300   RM-500  
SITE PREP TRACTOR  2864C   586C  
SNOW BLOWER  SR118  
TELEHANDLER  RT50   TH210   TH215  
THUMB  HYDRAULIC  
TRACK LOADER  953D   963C   963D   973C   973D  
TRENCHER  T9B  
UNDERGROUND ART TRUCK  AD30   AD45B   AD55   AD55B  
WHEEL DOZER  824K   834K  
WHEEL FELLER BUNCHER  2470C   2570C   2670C   553C   563C   573C  
WHEEL HARVESTER  550   550B   560B   570   570B   580   580B  
WHEEL TRACTOR  621H   623H   627H  
WHEEL TRACTOR-SCRAPER  621K   623K   623K LRC   627K   627K LRC   Caterpillar

Information:

3500 Family Of EnginesTwo front timing gear housings are used on the 3500 Family Of Engines. Effective with the serial numbers listed in the chart, engines with no auxiliary or accessory drive on the left side will use the 7W1529 Housing. This housing has no left side drive locations. Engines that have a left side auxiliary or accessory drive (L.H. governor drive, L.H. auxiliary water pump, L.H. pulley drive, etc.) will use the 7W3376 Housing. The 7W3376 Housing has all of the left and right side mounting positions. For earlier engines other than those listed in the chart, only the 7W3376 Housing was used.

Cat SIS web machinery list:

Caterpillar parts catalog
C18 Marine Generator Set SSM00001-UP
C18 Marine Generator Set SSW00001-UP
C9.3 Marine Generator Set C9300001-UP
C32 Marine Generator Set GM200001-UP
C32 Marine Generator Set GM300001-UP
C32 Marine Generator Set MG400001-UP
301.6 Mini Hydraulic Excavator MY600001-UP (MACHINE) POWERED BY C1.1 Engine
301.8 Mini Hydraulic Excavator H8X00001-UP (MACHINE) POWERED BY C1.1 Engine
301.7CR Mini Hydraulic Excavator JH700001-UP (MACHINE) POWERED BY C1.1 Engine
301.5 Mini Hydraulic Excavator MNH00001-UP (MACHINE) POWERED BY C1.1 Engine
302 CR Mini Hydraulic Excavator RHM00001-UP (MACHINE) POWERED BY C1.1 Engine
797F Off-Highway Truck LTZ00001-UP (MACHINE) POWERED BY C175 Engine
140 AWD Motor Grader N9500001-UP (MACHINE) POWERED BY C9.3 Engine
310 Mini Hydraulic Excavator GWT00001-UP (MACHINE) POWERED BY C3.3B Engine
120 Motor Grader Y9C00001-UP (MACHINE) POWERED BY C7.1 Engine
120 AWD Motor Grader Y9D00001-UP (MACHINE) POWERED BY C7.1 Engine
120 Motor Grader E9400001-UP (MACHINE) POWERED BY C7.1 Engine
120 AWD Motor Grader Y9B00001-UP (MACHINE) POWERED BY C7.1 Engine
120 AWD Motor Grader E9300001-UP (MACHINE) POWERED BY C7.1 Engine
120 AWD Motor Grader E9500001-UP (MACHINE) POWERED BY C7.1 Engine
PM620 Cold Planer 8RF00001-UP POWERED BY C18 Engine
3508B Generator Set 5KW00001-UP
3512B Generator Set 6GW00001-UP
3516B Generator Set 8NW00001-UP
3508 Generator Set 5PW00001-UP
3512 Generator Set 6WW00001-UP
3516 Generator Set 8TW00001-UP
3516B Generator Set FDX00001-UP
3516 Generator Set YAL00001-UP
3516B Generator Set YAP00001-UP
3516B Generator Set YAR00001-UP
C18 Marine Auxiliary Generator Set MGS00001-UP
C18 Marine Generator Set JHL00001-UP
C18 Marine SCAC Generator Set DTP00001-UP
3516 Generator Set YAS00001-UP
3516B Generator Set YAT00001-UP
C18 Marine Auxiliary Generator Set GBM00001-UP POWERED BY C18 Engine
C32 Marine Generator Set RTK00001-UP
CB-534B Vibratory Compactor 5RN00001-UP (MACHINE) POWERED BY 3054 Engine
PS-300B PF-300B Pneumatic Compactor 4PN00001-00525 (MACHINE) POWERED BY 3054 Engine
CB-434B Vibratory Compactor 7YN00001-UP (MACHINE) POWERED BY 3054 Engine
CS-531C Vibratory Compactor 5ZN00001-UP (MACHINE) POWERED BY 3116 Engine
CP-533C CS-533C Vibratory Compactor 2WN00001-UP (MACHINE) POWERED BY 3116 Engine
CP-533C CS-533C Vibratory Compactor 2XN00001-UP (MACHINE) POWERED BY 3116 Engine
CS-563C, CP-563C Vibratory Compactors 4KN00001-UP (MACHINE) POWERED BY 3116 Engine
CP-563C CS-563C Vibratory Compactors 4LN00001-UP (MACHINE) POWERED BY 3116 Engine
CS-573C Vibratory Compactor 6LN00001-UP (MACHINE) POWERED BY 3116 Engine
CS-583C Vibratory Compactor 7MN00001-UP (MACHINE) POWERED BY 3116 Engine
CS-583C Vibratory Compactor 7NN00001-UP (MACHINE) POWERED BY 3116 Engine
CS-433C CP-433C Vibratory Compactor 2JM00001-UP (MACHINE) POWERED BY 3054 Engine
CP-433C CS-433C Vibratory Compactor 1ZN00001-UP (MACHINE) POWERED BY 3054 Engine
CS-431C Vibratory Compactor 9XL00001-UP (MACHINE) POWERED BY 3054 Engine
CS-431C Vibratory Compactor 6EN00001-UP (MACHINE) POWERED BY 3054 Engine
CS-531C Vibratory Compactor 9RN00001-UP (MACHINE) POWERED BY 3116 Engine
CB-544 Vibratory Compactor 8FM00001-UP (MACHINE) POWERED BY 3054 Engine
CB-535B Vibratory Compactor 3AR00001-UP (MACHINE) POWERED BY 3054 Engine
CB-545 Vibratory Compactor 2FS00001-UP (MACHINE) POWERED BY 3054 Engine
CB-534C Vibratory Compactor 1WS00001-UP (MACHINE) POWERED BY 3054 Engine
CS-431C VIbratory Compactor 3WZ00001-UP (MACHINE) POWERED BY 3054 Engine
CS-433C CP-433C Vibratory Compactors 4JZ00001-UP (MACHINE) POWERED BY 3054 Engine
CB-434C Vibratory Compactor 4MW00001-UP (MACHINE) POWERED BY 3054 Engine
DEUCE Engineer Support Tractor 7RR00001-UP (MACHINE) POWERED BY 3126 Engine
30-30 Engineer Support Tractor 9XW00001-UP (MACHINE) POWERED BY 3126 Engine
PS-300B PF-300B Pneumatic Compactor 4PN00526-UP (MACHINE) POWERED BY 3054 Engine
RM-500 Reclaimer Mixer ASW00001-UP (MACHINE) POWERED BY C15 Engine
RM-300 Rotary Mixer BWR00001-UP (MACHINE) POWERED BY C11 Engine
PF-300C,PS-300C Pneumatic Compactor PFB00001-UP (MACHINE) POWERED BY 3054C Engine
PS-500 Pneumatic Compactor 7XD00001-UP (MACHINE) POWERED BY 3208 Engine
AP1055 F Asphalt Paver TJ500001-UP (MACHINE) POWERED BY C7.1 Engine
AP1000 F Asphalt Paver AC400001-UP (MACHINE) POWERED BY C7.1 Engine
AP1055 F Asphalt Paver RLM00001-UP (MACHINE) POWERED BY C7.1 Engine
RM500B Rotary Mixer MB900001-UP (MACHINE) POWERED BY C15 Engine
PM622 Cold Planer JFC00001-UP (MACHINE) POWERED BY C18 Engine
AP500F Asphalt Paver 44900001-UP (MACHINE) POWERED BY C4.4 Engine
AP655F & AP600F Asphalt Paver 65500001-UP (MACHINE) POWERED BY C4.4 Engine


Parts locknut Caterpillar catalog:

5M6667 LOCKNUT
12H NA, 140H NA, 160H NA, 24H, 24M, 322B L, 322C FM, 325B L, 330B L, 527, 530B, 587R, 587T, 977K, 977L, D4, D5M, D5N, D6H, D6M, D6N, D6R II, D9E, GH52, PL87, PM-201, PM-565, PM-565B, PR-1000, RM-300, ...
4J8734 LOCKNUT
641, 641B, 651, 651B, 651E, 657, 657B, 657E, 657G, 666, 973D, 988B, 988F, 988F II, 992, D10N, D10R, D10T, D10T2, D9L, R1700 II, R1700G, R2900, R2900G
9C8287 LOCKNUT-STAKE
2470C, 2570C, 2670C, 2864C, 515, 518C, 525, 525B, 525C, 525D, 533, 535B, 535C, 535D, 543, 545, 545C, 545D, 553C, 555D, 563C, 573C, 586C, 936F, 938F, 938G, 938G II, 950F, 950F II, 950G, 950G II, 950H, ...
3D4904 LOCKNUT
120B, 120G, 120H, 120H ES, 120H NA, 120M, 120M 2, 12E, 12F, 12G, 12H, 12H ES, 12H NA, 12M 2, 12M 3 AWD, 130G, 135H, 135H NA, 140B, 140G, 140H, 140H ES, 140H NA, 140K, 140M, 140M 2, 140M 3 AWD, 143H, 1...
2S0607 LOCKNUT
12G, 130G, 14G, 14H, 14H NA, 16, 16G, 16H, 16H NA, 518, 528, 613, 613B, 621F, 623E, 627F, 631C, 633C, 633D, 637D, 657B, 657E, 920, 930, 980, 980B
7Y4695 LOCKNUT
1390, 2590, 320 L, 320B, 320C, 320N, 322 LN, 322B, 322B L, 322B LN, 322C, 322C FM, 323D L, 324D, 324D L, 324D LN, 324E, 324E L, 324E LN, 325, 325 L, 325 LN, 325B, 325B L, 325C, 325C FM, 325C L, 325D, ...
9X6018 LOCKNUT
5080, 5110B, 5130, 5130B, 990, 990 II, 990K, 992G, 992K, R1600G, R1600H
1232060 LOCKNUT
1390, 2590, 320B, 320C, 320D, 320D FM, 320D2, 320D2 L, 322B L, 322B LN, 322C, 322C FM, 323D L, 323D LN, 323D SA, 324D, 324D FM, 324D FM LL, 324D L, 324D LN, 325B L, 325C, 325C FM, 325D, 325D FM, 325D ...
7Y4956 LOCKNUT
322B L, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 325B L, 325C, 325D L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 330D, 330D FM, 330D L, 330D LN, 336D, 336D L, 336D LN, 336D...
0309209 LOCKNUT
768C, 769C, 769D, 771C, 771D, 772B, 773B, 773D, 773E, 773F, 775B, 775D, 775E, 775F, 777F, D9R
1232112 LOCKNUT-SPECIAL
324D, 325B L, 325C, 325C FM, 325D FM, 325D FM LL, 329D LN, 330B, 330B L, 330C, 330C FM, 330C L, 330C MH, 330D, 330D FM, 330D L, 330D LN, 330D MH, 336D, 336D L, 336D LN, 336D2, 336D2 L, 336E, 336E HVG,...
1163513 LOCKNUT-SPECIAL
345C, 350, 350 L, 365B, 365B II, 365B L, 365C, 365C L, 365C L MH, 374D L, 374F L, 375, 375 L, 385B, 385C, 385C L, 390D, 390D L, 390F L, 5080
7M9918 LOCKNUT
120H, 120K, 12E, 12H, 12K, 135H, 140G, 140H, 140K, 140M, 14G, 160H, 160H ES, 160H NA, 160K, 160M, 1673, 1673B, 1673C, 1674, 1676, 1693, 16G, 16H NA, 235, 235B, 235C, 245, 245B, 245D, 3126, 3126B, 3126...
5J5731 LOCKNUT
12E, 12F, 14E, 14H, 14H NA, 14M, 16, 16H, 16H NA, 16M, 215C, 215D, 416E, 416F, 420E, 420F, 422E, 426B, 426C, 428E, 432E, 434E, 436C, 450E, 525C, 525D, 535C, 535D, 545C, 545D, 555D, 611, 613, 613G, 615...
1110343 LOCKNUT
1090, 1190, 1190T, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 1290T, 12G, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 1390, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, ...
1967708 LOCKNUT
3034, 3054, 3054B, 3056, 416C, 426C, 428C, 436C, 438C, C4.4
1789983 LOCKNUT
216, 216B, 216B3, 226B, 226B3, 228, 232B, 236, 236B, 236B3, 236D, 242B, 242B3, 242D, 246C, 246D, 247, 247B, 247B3, 248, 252B, 252B3, 256C, 257B, 257B3, 257D, 259B3, 259D, 262C, 262C2, 262D, 267, 267B,...
8T2659 LOCKNUT
1090, 1190, 1190T, 120M 2, 1290T, 1390, 14M, 16M, 2470C, 24M, 2570C, 2670C, 2864C, 30/30, 3054, 3056, 317B LN, 3208, 3306, 3306B, 3406B, 3406C, 3412, 3412C, 3456, 3508, 3508B, 3512, 3512B, 3512C, 3516...
1862978 LOCKNUT
65E, 75E, 85E, 95E
1862971 LOCKNUT
65E, 75E, 85E, 95E
1519060 LOCKNUT
35, 65E, 75E, 85E, 95E
3F7673 LOCKNUT
10 FT, 10-20B, 235D, 245, 245B, 245D, 3406, 3406B, 3408, 561D, 572G, 583H, 583K, 594, 594H, 613B, 773B, 7A, 7S, 8 FT, 8-16B, 8A, 8S, 9A, 9S, BP18, CP-433B, CP-433C, CS-323C, CS-431C, CS-433C, D5, D5B,...
1K6872 LOCKNUT
10 FT, 10-20B, 10B, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12E, 12F, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140B, 140G, 140H, 140H ES, 140...
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