Caterpillar Lockwasher (3B4501)
Compatible equipment models: 3B4501:
ARTICULATED TRUCK 725 725C 730 730C 735 735B 740 740B D250E D250E II D25C D300E D300E II D30C D350C D350E D350E II D35C D35HP D400 D400E D400E II D40D D44B D550B
ASPHALT PAVER AP-1000 AP-1000B AP-1000E AP-1055B AP-1055D AP-1055E AP-1200 AP-200B AP-555E AP-600D AP-650B AP-655C AP-655D AP-800 AP-800C AP-800D AP-900B BG-225B BG-225C BG-2455C BG-2455D BG-245C BG-260D BG1000E BG1055E BG500E
BACKHOE 931
BACKHOE LOADER 416 416B 416C 416E 420D 420E 426B 426C 428 428B 428C 436 436C 438C 446 446B
CHALLENGER 65C 65E 75C 75D 75E 85C 85D 85E 95E
COLD PLANER PM-201 PM-465 PM-565 PM-565B PR-1000 PR-450C
COMPACT WHEEL LOADER 910 910E 910G 914G
EJECTOR TRUCK 730 730C 740 740B D400E II
ENGINE - MACHINE 3304
EXCAVATOR 215 215B 215C 215D 225 225D 229 231D 235 235B 235C 235D 245 245B 245D 307 311B 311D LRR 311F LRR 312 312B L 312C 312C L 312D 312D L 312D2 312D2 GC 312D2 L 312E 312E L 313B 313D 313D2 313D2 LGP 314C 314D CR 314D LCR 314E CR 314E LCR 315 315B L 315C 315D L 316E L 317 317B LN 318B 318C 318D L 318D2 L 318E L 319C 319D 319D L 319D LN 320 L 320B 320B FM LL 320B L 320C 320C FM 320C L 320D 320D FM 320D FM RR 320D GC 320D L 320D LN 320D LRR 320D RR 320D2 320D2 GC 320D2 L 320E 320E L 320E LN 320E LRR 320E RR 321C 321D LCR 322B L 322B LN 322C 322C FM 323D L 323D LN 323D SA 323D2 L 323E L 324D 324D FM 324D FM LL 324D L 324D LN 324E 324E L 324E LN 325 325 L 325 LN 325B 325B L 325C 325C FM 325C L 325D 325D FM 325D L 325D MH 326D L 328D LCR 329D 329D L 329D LN 329E 329E L 329E LN 330 330 L 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 H 336E L 336E LH 336E LN 336F L 340D L 340D2 L 345B 345B II 345B II MH 345B L 345C 345C L 345C MH 345D 345D L 345D L VG 349D 349D L 349E 349E L 349E L VG 349F L 350 350 L 365B 365B II 365B L 365C 365C L 365C L MH 374D L 374F L 375 375 L 385B 385C 385C FS 385C L 385C L MH 390D 390D L 390F L 568 FM LL E180 E240 E240C E300 M325D L MH M325D MH
FRONT SHOVEL 385C 5080 5090B
GAS ENGINE G3304 G3306 G3406 G3408 G3408B G3408C G3412 G342C G343 G3508 G3512 G3516 G3520B G353D G379 G399
GEN SET ENGINE 3114 3116 3160 3208 3304 3304B 3306 3306B 3406 3406B 3406C 3408 3412 3412C 3508 3508B 3512 3512B 3516 3516B D379B D399 G3412C G3508 G3512 G3516 G3516B
GENERATOR SR4B
GENERATOR SET 3306B 3406C 3406E 3408C 3412 3412C 3456 3508 3508B 3508C 3512 3512B 3512C 3516 3516B 3516C C13 XQ350 C15 C175-16 C175-20 C18 C27 C32 C9 G3306 G3406 G3412 G3508 G3512 G3512E G3516 G3516B G3516C G3516E G3516H G3520C G3520E
HARVESTER HEAD HH44 DE
HYDRAULIC CONTROL 46
INDUSTRIAL ENGINE 3114 3116 3126 3126B 3160 3208 3304 3306 3306B 3406 3406B 3406C 3406E 3408 3408B 3408C 3408E 3412 3412C 3412E 3456 3508 3508B 3512 3512B 3512C 3516 C-10 C-12 C-15 C-16 C-9 C11 C15 C18 C9 D320A D342 D342C D343 D346 D348 D353C D379 D398 D399
INDUSTRIAL TRACTOR HA771 HA871 TK371 TK381
INTEGRATED TOOLCARRIER IT12 IT12B IT14G IT14G2 IT18F IT24F IT28 IT28F IT28G IT38F IT38G IT38G II IT62G
KNUCKLEBOOM LOADER 539
LANDFILL COMPACTOR 816F 816F II 826B 826G 826G II 826H 836G 836H
LOAD HAUL DUMP R1300 R1300G R1600 R1600G R1700 II R1700G R2900
LOCOMOTIVE ENGINE 3508 3508B 3508C 3512 3512B 3512C 3516 3516B 3516C C175-16
LOGGER 227 322C
MARINE AUXILIARY 3508B 3512 3512B 3516B 3608 C32
MARINE ENGINE 3116 3176B 3176C 3196 3208 3304 3304B 3306 3306B 3406 3406B 3406C 3406E 3408 3408B 3408C 3412 3412C 3412D 3412E 3508 3508B 3512 3512B 3516 3516B 3606 3608 3612 3616 C-12 C12 C15 C175-16 C280-12 C280-16 C280-6 C280-8 C30 C32 D315 D326F D330A D330B D333A D333B D334 D336 D337 D337F D342 D342C D343 D348 D349 D353C D364 D375D D379A D397D D398A
MATERIAL HANDLER MH3049 MH3059
MINI HYD EXCAVATOR 307 307B 308D
MINING EXCAVATOR 5110B 5130 5130B 5230 5230B
MOBILE HYD POWER UNIT 323D L 323D LN 324D LN 325C 325D 325D L 329D L 329E 330C 330D 330D L 336D L 336E 336E HVG 345C L 349D L 349E 349E L HVG 365C L 385C 385C L
MOTOR GRADER 120 120B 120G 120H 120H ES 120H NA 120M 12E 12F 12G 12H 12H ES 12H NA 130G 135H 135H NA 140 140B 140G 140H 140H ES 140H NA 143H 14E 14G 14H 14H NA 16 160G 160H 160H ES 160H NA 163H 163H NA 16G 16H 16H NA 24H
MULTI TERRAIN LOADER 277C
PETROLEUM ENGINE 3508B 3508C 3512 3512B 3512C 3516C C11 C15 C175-16 C18 C9
PETROLEUM GEN SET C15 C18 C27 C32
PETROLEUM PACKAGE CX31-C15I CX31-C9I CX35-P800 TH35-C11I TH35-C15I
PETROLEUM TRANSMISSION TH31-E61 TH48-E80
PIPELAYER 561B 561C 561D 561M 561N 571G 572G 572R 572R II 578 583H 583K 583R 583T 587R 587T 589 594 594H PL61 PL83 PL87
PNEUMATIC COMPACTOR PF-290B PF-300C PS-150B PS-150C PS-200B PS-300B PS-360B PS-360C PS-500
POWER MODULE PM3412 PM3508 PM3512 PM3516 PMG3516 PP3516
PUMPER SPF343C SPT343
QUARRY TRUCK 771C 771D 775B 775D
RECLAIMER MIXER RM-250C RM-300 RM-350B RM-500
ROAD RECLAIMER RM-350B RR-250 RR-250B
SOIL COMPACTOR 815 815F 815F II 825C 825G 825G II 825H
SOIL STABILIZER SS-250
STABILIZER MIXER SM-350
TELEHANDLER TH210 TH215 TH220B TH330B TH340B TH350B TH355B TH460B TH560B TH580B
TRACK FELLER BUNCHER 1090 1190 1190T 1290T 1390 2290 2390 2391 2491 2590 511 521 521B 522 522B 532 541 541 2 551 552 552 2 FB221 TK711 TK721 TK722 TK732 TK741 TK751 TK752
TRACK LOADER 931B 931C 933 935B 935C 939 941 943 951B 953 953B 953C 953D 955C 955H 955K 955L 963 963B 963C 963D 973 973C 973D 977D 977H 977K 977L 983 983B
TRACK SKIDDER 517 527 D4HTSK II D4HTSK III D5HTSK II
TRACK-TYPE TRACTOR 30/30 D10 D10N D10R D10T D10T2 D11N D11R D11T D3B D3C D3C II D3C III D3G D3K XL D3K2 LGP D4C D4C III D4D D4E D4E SR D4G D4H D4H XL D4K XL D4K2 XL D5 D5B D5C III D5E D5G D5H D5H XL D5K LGP D5K2 XL D5M D5N D5R LGP D6C D6D D6E D6E SR D6G D6G SR D6G2 LGP D6G2 XL D6H D6H XL D6H XR D6K D6K LGP D6K XL D6K2 D6K2 LGP D6M D6N D6N LGP D6N OEM D6R D6R II D6R III D6R STD D6T D6T LGP D6T LGPPAT D6T XL D7E D7E LGP D7F D7G D7G2 D7H D7R D7R II D7R XR D8H D8K D8L D8N D8R D8R II D8T D9E D9G D9H D9L D9N D9R D9T DEUCE
TRACTOR 768B 768C 772 772B 776 776C 776D 784C
TRUCK 769 769C 769D 770 772 773 773B 773D 773E 773G OEM 775D 775E 775G OEM 777 777B 777D 777G 785 785B 785C 785D 789 789B 789C 789D 793C 793D 797 797B
TRUCK ENGINE 1140 1160 1673 1673C 1674 1676 1693 3116 3208 3306 3406 3406B 3408
UNDERGROUND ART TRUCK AD40 AD45 AE40 AE40 II
VEHICULAR ENGINE 3508 3512 3516 D346 D348 D349
VIBRATORY COMPACTOR CB-214B CB-214D CB-224C CB-334D CB-335D CB-434 CB-434B CB-434C CB-521 CB-525B CB-534 CB-534B CB-534C CB-535B CB-544 CB-545 CB-614 CB-634 CB-634C CP-433C CP-433E CP-44 CP-533E CP-54B CP-56 CP-563 CP-573E CP-64 CP-663E CP-68B CP-74B CP-76 CS-323C CS-423E CS-431C CS-433C CS-433E CS-44 CS-531 CS-531C CS-531D CS-533 CS-533C CS-533D CS-533E CS-54 CS-551 CS-56 CS-563C CS-563D CS-563E CS-56B CS-573C CS-573D CS-583 CS-583C CS-583D CS-583E CS-64 CS-643 CS-64B CS-663E CS-66B CS-683E CS-74 CS-76B
WATER DELIVERY SYSTEM 777G
WHEEL DOZER 814 814F 814F II 824 824B 824C 824G 824G II 824H 834 834G 834H 844 844H 854G 854K
WHEEL FELLER BUNCHER 533 543 HA770 HA870 TK370 TK380
WHEEL LOADER 916 918F 920 924F 924G 924GZ 924H 924HZ 926 928G 928H 928HZ 930 930G 930R 936 936F 938F 938G 938G II 950 950B 950B/950E 950F 950F II 950G 950G II 950H 960F 962G 962G II 962H 966C 966D 966F 966F II 966G 966G II 966H 966R 970F 972G 972G II 972H 980 980B 980C 980F 980F II 980G 980G II 980H 988 988B 988F 988F II 988G 988H 990 990 II 990H 992 992C 992D 992G 992K 994 994F G936
WHEEL SCRAPER 615C 621E 621G 623E 623F 627 627B 627E 637 637B 637D 637E 639D 657 657B 657E 666
WHEEL SKIDDER 508 515 518 518C 525 525B 525C 528 528B 530B 535B 535C 545 545C
WHEEL TRACTOR 611 613 613B 613C 613C II 615 621 621B 621E 621F 621G 621H 621R 623 623E 623G 627 627B 627E 627F 627G 631C 631D 631E 631G 633D 633E II 637 637D 637E 637G 641 641B 650B 651 651E 657 657B 657E 657G 666 666B
WHEEL TRACTOR-SCRAPER 613G
WHEELED EXCAVATOR M313C M313D M315C M315D M316C M316D M318C M318C MH M318D M318D MH M322C M322D M322D MH M325B M325C MH M330D W330B W345B II W345C MH Caterpillar
Weight(lbs): 0.1
Length(cm): 0.7
Width(cm): 0.7
Depth(cm): 0.1
ARTICULATED TRUCK 725 725C 730 730C 735 735B 740 740B D250E D250E II D25C D300E D300E II D30C D350C D350E D350E II D35C D35HP D400 D400E D400E II D40D D44B D550B
ASPHALT PAVER AP-1000 AP-1000B AP-1000E AP-1055B AP-1055D AP-1055E AP-1200 AP-200B AP-555E AP-600D AP-650B AP-655C AP-655D AP-800 AP-800C AP-800D AP-900B BG-225B BG-225C BG-2455C BG-2455D BG-245C BG-260D BG1000E BG1055E BG500E
BACKHOE 931
BACKHOE LOADER 416 416B 416C 416E 420D 420E 426B 426C 428 428B 428C 436 436C 438C 446 446B
CHALLENGER 65C 65E 75C 75D 75E 85C 85D 85E 95E
COLD PLANER PM-201 PM-465 PM-565 PM-565B PR-1000 PR-450C
COMPACT WHEEL LOADER 910 910E 910G 914G
EJECTOR TRUCK 730 730C 740 740B D400E II
ENGINE - MACHINE 3304
EXCAVATOR 215 215B 215C 215D 225 225D 229 231D 235 235B 235C 235D 245 245B 245D 307 311B 311D LRR 311F LRR 312 312B L 312C 312C L 312D 312D L 312D2 312D2 GC 312D2 L 312E 312E L 313B 313D 313D2 313D2 LGP 314C 314D CR 314D LCR 314E CR 314E LCR 315 315B L 315C 315D L 316E L 317 317B LN 318B 318C 318D L 318D2 L 318E L 319C 319D 319D L 319D LN 320 L 320B 320B FM LL 320B L 320C 320C FM 320C L 320D 320D FM 320D FM RR 320D GC 320D L 320D LN 320D LRR 320D RR 320D2 320D2 GC 320D2 L 320E 320E L 320E LN 320E LRR 320E RR 321C 321D LCR 322B L 322B LN 322C 322C FM 323D L 323D LN 323D SA 323D2 L 323E L 324D 324D FM 324D FM LL 324D L 324D LN 324E 324E L 324E LN 325 325 L 325 LN 325B 325B L 325C 325C FM 325C L 325D 325D FM 325D L 325D MH 326D L 328D LCR 329D 329D L 329D LN 329E 329E L 329E LN 330 330 L 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 H 336E L 336E LH 336E LN 336F L 340D L 340D2 L 345B 345B II 345B II MH 345B L 345C 345C L 345C MH 345D 345D L 345D L VG 349D 349D L 349E 349E L 349E L VG 349F L 350 350 L 365B 365B II 365B L 365C 365C L 365C L MH 374D L 374F L 375 375 L 385B 385C 385C FS 385C L 385C L MH 390D 390D L 390F L 568 FM LL E180 E240 E240C E300 M325D L MH M325D MH
FRONT SHOVEL 385C 5080 5090B
GAS ENGINE G3304 G3306 G3406 G3408 G3408B G3408C G3412 G342C G343 G3508 G3512 G3516 G3520B G353D G379 G399
GEN SET ENGINE 3114 3116 3160 3208 3304 3304B 3306 3306B 3406 3406B 3406C 3408 3412 3412C 3508 3508B 3512 3512B 3516 3516B D379B D399 G3412C G3508 G3512 G3516 G3516B
GENERATOR SR4B
GENERATOR SET 3306B 3406C 3406E 3408C 3412 3412C 3456 3508 3508B 3508C 3512 3512B 3512C 3516 3516B 3516C C13 XQ350 C15 C175-16 C175-20 C18 C27 C32 C9 G3306 G3406 G3412 G3508 G3512 G3512E G3516 G3516B G3516C G3516E G3516H G3520C G3520E
HARVESTER HEAD HH44 DE
HYDRAULIC CONTROL 46
INDUSTRIAL ENGINE 3114 3116 3126 3126B 3160 3208 3304 3306 3306B 3406 3406B 3406C 3406E 3408 3408B 3408C 3408E 3412 3412C 3412E 3456 3508 3508B 3512 3512B 3512C 3516 C-10 C-12 C-15 C-16 C-9 C11 C15 C18 C9 D320A D342 D342C D343 D346 D348 D353C D379 D398 D399
INDUSTRIAL TRACTOR HA771 HA871 TK371 TK381
INTEGRATED TOOLCARRIER IT12 IT12B IT14G IT14G2 IT18F IT24F IT28 IT28F IT28G IT38F IT38G IT38G II IT62G
KNUCKLEBOOM LOADER 539
LANDFILL COMPACTOR 816F 816F II 826B 826G 826G II 826H 836G 836H
LOAD HAUL DUMP R1300 R1300G R1600 R1600G R1700 II R1700G R2900
LOCOMOTIVE ENGINE 3508 3508B 3508C 3512 3512B 3512C 3516 3516B 3516C C175-16
LOGGER 227 322C
MARINE AUXILIARY 3508B 3512 3512B 3516B 3608 C32
MARINE ENGINE 3116 3176B 3176C 3196 3208 3304 3304B 3306 3306B 3406 3406B 3406C 3406E 3408 3408B 3408C 3412 3412C 3412D 3412E 3508 3508B 3512 3512B 3516 3516B 3606 3608 3612 3616 C-12 C12 C15 C175-16 C280-12 C280-16 C280-6 C280-8 C30 C32 D315 D326F D330A D330B D333A D333B D334 D336 D337 D337F D342 D342C D343 D348 D349 D353C D364 D375D D379A D397D D398A
MATERIAL HANDLER MH3049 MH3059
MINI HYD EXCAVATOR 307 307B 308D
MINING EXCAVATOR 5110B 5130 5130B 5230 5230B
MOBILE HYD POWER UNIT 323D L 323D LN 324D LN 325C 325D 325D L 329D L 329E 330C 330D 330D L 336D L 336E 336E HVG 345C L 349D L 349E 349E L HVG 365C L 385C 385C L
MOTOR GRADER 120 120B 120G 120H 120H ES 120H NA 120M 12E 12F 12G 12H 12H ES 12H NA 130G 135H 135H NA 140 140B 140G 140H 140H ES 140H NA 143H 14E 14G 14H 14H NA 16 160G 160H 160H ES 160H NA 163H 163H NA 16G 16H 16H NA 24H
MULTI TERRAIN LOADER 277C
PETROLEUM ENGINE 3508B 3508C 3512 3512B 3512C 3516C C11 C15 C175-16 C18 C9
PETROLEUM GEN SET C15 C18 C27 C32
PETROLEUM PACKAGE CX31-C15I CX31-C9I CX35-P800 TH35-C11I TH35-C15I
PETROLEUM TRANSMISSION TH31-E61 TH48-E80
PIPELAYER 561B 561C 561D 561M 561N 571G 572G 572R 572R II 578 583H 583K 583R 583T 587R 587T 589 594 594H PL61 PL83 PL87
PNEUMATIC COMPACTOR PF-290B PF-300C PS-150B PS-150C PS-200B PS-300B PS-360B PS-360C PS-500
POWER MODULE PM3412 PM3508 PM3512 PM3516 PMG3516 PP3516
PUMPER SPF343C SPT343
QUARRY TRUCK 771C 771D 775B 775D
RECLAIMER MIXER RM-250C RM-300 RM-350B RM-500
ROAD RECLAIMER RM-350B RR-250 RR-250B
SOIL COMPACTOR 815 815F 815F II 825C 825G 825G II 825H
SOIL STABILIZER SS-250
STABILIZER MIXER SM-350
TELEHANDLER TH210 TH215 TH220B TH330B TH340B TH350B TH355B TH460B TH560B TH580B
TRACK FELLER BUNCHER 1090 1190 1190T 1290T 1390 2290 2390 2391 2491 2590 511 521 521B 522 522B 532 541 541 2 551 552 552 2 FB221 TK711 TK721 TK722 TK732 TK741 TK751 TK752
TRACK LOADER 931B 931C 933 935B 935C 939 941 943 951B 953 953B 953C 953D 955C 955H 955K 955L 963 963B 963C 963D 973 973C 973D 977D 977H 977K 977L 983 983B
TRACK SKIDDER 517 527 D4HTSK II D4HTSK III D5HTSK II
TRACK-TYPE TRACTOR 30/30 D10 D10N D10R D10T D10T2 D11N D11R D11T D3B D3C D3C II D3C III D3G D3K XL D3K2 LGP D4C D4C III D4D D4E D4E SR D4G D4H D4H XL D4K XL D4K2 XL D5 D5B D5C III D5E D5G D5H D5H XL D5K LGP D5K2 XL D5M D5N D5R LGP D6C D6D D6E D6E SR D6G D6G SR D6G2 LGP D6G2 XL D6H D6H XL D6H XR D6K D6K LGP D6K XL D6K2 D6K2 LGP D6M D6N D6N LGP D6N OEM D6R D6R II D6R III D6R STD D6T D6T LGP D6T LGPPAT D6T XL D7E D7E LGP D7F D7G D7G2 D7H D7R D7R II D7R XR D8H D8K D8L D8N D8R D8R II D8T D9E D9G D9H D9L D9N D9R D9T DEUCE
TRACTOR 768B 768C 772 772B 776 776C 776D 784C
TRUCK 769 769C 769D 770 772 773 773B 773D 773E 773G OEM 775D 775E 775G OEM 777 777B 777D 777G 785 785B 785C 785D 789 789B 789C 789D 793C 793D 797 797B
TRUCK ENGINE 1140 1160 1673 1673C 1674 1676 1693 3116 3208 3306 3406 3406B 3408
UNDERGROUND ART TRUCK AD40 AD45 AE40 AE40 II
VEHICULAR ENGINE 3508 3512 3516 D346 D348 D349
VIBRATORY COMPACTOR CB-214B CB-214D CB-224C CB-334D CB-335D CB-434 CB-434B CB-434C CB-521 CB-525B CB-534 CB-534B CB-534C CB-535B CB-544 CB-545 CB-614 CB-634 CB-634C CP-433C CP-433E CP-44 CP-533E CP-54B CP-56 CP-563 CP-573E CP-64 CP-663E CP-68B CP-74B CP-76 CS-323C CS-423E CS-431C CS-433C CS-433E CS-44 CS-531 CS-531C CS-531D CS-533 CS-533C CS-533D CS-533E CS-54 CS-551 CS-56 CS-563C CS-563D CS-563E CS-56B CS-573C CS-573D CS-583 CS-583C CS-583D CS-583E CS-64 CS-643 CS-64B CS-663E CS-66B CS-683E CS-74 CS-76B
WATER DELIVERY SYSTEM 777G
WHEEL DOZER 814 814F 814F II 824 824B 824C 824G 824G II 824H 834 834G 834H 844 844H 854G 854K
WHEEL FELLER BUNCHER 533 543 HA770 HA870 TK370 TK380
WHEEL LOADER 916 918F 920 924F 924G 924GZ 924H 924HZ 926 928G 928H 928HZ 930 930G 930R 936 936F 938F 938G 938G II 950 950B 950B/950E 950F 950F II 950G 950G II 950H 960F 962G 962G II 962H 966C 966D 966F 966F II 966G 966G II 966H 966R 970F 972G 972G II 972H 980 980B 980C 980F 980F II 980G 980G II 980H 988 988B 988F 988F II 988G 988H 990 990 II 990H 992 992C 992D 992G 992K 994 994F G936
WHEEL SCRAPER 615C 621E 621G 623E 623F 627 627B 627E 637 637B 637D 637E 639D 657 657B 657E 666
WHEEL SKIDDER 508 515 518 518C 525 525B 525C 528 528B 530B 535B 535C 545 545C
WHEEL TRACTOR 611 613 613B 613C 613C II 615 621 621B 621E 621F 621G 621H 621R 623 623E 623G 627 627B 627E 627F 627G 631C 631D 631E 631G 633D 633E II 637 637D 637E 637G 641 641B 650B 651 651E 657 657B 657E 657G 666 666B
WHEEL TRACTOR-SCRAPER 613G
WHEELED EXCAVATOR M313C M313D M315C M315D M316C M316D M318C M318C MH M318D M318D MH M322C M322D M322D MH M325B M325C MH M330D W330B W345B II W345C MH Caterpillar
Weight(lbs): 0.1
Length(cm): 0.7
Width(cm): 0.7
Depth(cm): 0.1
Questions Caterpillar Lockwasher (3B4501) 0 questions