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| Jaw Nuts
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| TO FIT CHUCKS WITH 1.5MM x 60º SERRATIONS |
| CHUCK SIZE | CRITICAL DIMENSIONS | |||||||
| PART # | A | B | C | D | G | F | BOLT | |
| 5" KITAGAWA | JN-135-A | 1-3/16 | .612 | .550 | .394 | .215 | .708 | 5/16-18 |
| 6" MATSUMOTO | JN-6B-M |
1-7/16 | .885 | .689 | .430 11MM |
.295 | .969 | 8MM 5/16-18 |
| 6" KITAGAWA HOWA HO15M-6 |
JN-6K-M JN-6K-A |
1-7/16 | .728 | .689 | .471 12MM |
.295 | .786 | 10MM 3/8-16 |
| HOWA HO75MA-6 | JN-6H-A | 1-7/16 | .551 | .669 | .471 | .295 | .787 | 5/16-18 |
| 8" KITAGAWA B-8 8" MATSUMOTO HOWA HO7MA-8 HOWA HO15-8 |
JN-149-M JN-149-A |
1-7/8 | .970 | .807 | .549 14MM |
.340 | 1.000 | 12MM 1/2-13 |
| 8" KITAGAWA B-208 | JN-208-M JN-208-A |
1-7/8 | .810 | .807 | .549 14MM |
.340 | 1.000 | 12MM 1/2-13 |
| 10" HOWA HO7MA-10/HO27M-8 |
JN-81-M JN-81-A |
2 | 1.000 | .910 | .628 16MM |
.374 | .984 | 12MM 1/2-13 |
| 10" KITAGAWA B-10 11" MATSUMOTO HOWA HO1MA-10 B-10 |
JN-82-M JN-82-A |
2 | 1.000 | .910 | .628 16MM |
.340 | 1.181 | 12MM 1/2-13 |
| 10" KITAGAWA B-210 | JN-210-M JN-210-A |
2 | .850 | .885 | .628 16MM |
.340 | 1.181 | 12MM 1/2-13 |
| 10" HOWA HOLLOW HOWA HO7MA-15 |
JN-95-M JN-95-A |
2-1/2 | 1.141 | 1.000 | .825 21MM |
.413 | 1.578 | 20MM 3/4-10 |
| HO27M-12 | JN-157-A | 2-1/2 | 1.141 | 1.000 | .825 | .413 | 1.578 | 5/8-11 |
| 12" KITAGAWA B-12 12" MATSUMOTO 10" HOWA HO1MA-12 HO7MA-12/HO27M-10 |
JN-108-M JN-108-A |
2-1/4 | 1.250 | 1.040 | .708 18MM |
.530 | 1.181 | 14MM 9/16-12 |
| 12" KITAGAWA B-212 | JN-112-M JN-112-A |
2-3/16 | 1.095 | 1.160 | .826 21MM |
.455 | 1.181 | 16MM 5/8-11 |
| 10" - 12" HOWA SOLID |
JN-113-M JN-113-A |
2 | .875 | .875 | .630 16MM |
.335 | 1.181 | 12MM 1/2-13 |
| 10" - 12" NIKKO HOLLOW | JN-125-A | 2-3/16 | 1.320 | 1.040 | .787 | .531 | 1.375 | 1/2-13 |
| 15" KITAGAWA B-15 | JN-155-M JN-155-A |
3-1/4 | 1.750 | 1.320 | .864 12MM |
.625 | 1.690 | 20MM 3/4-10 |
| 15" KITAGAWA B-215 | JN-115-M JN-115-A |
3-5/32 | 1.545 | 1.375 | .998 25.5MM |
.742 | 1.693 | 20MM 3/4-10 |
| TO FIT CHUCKS WITH 3MM x 60º SERRATIONS |
| CHUCK SIZE | CRITICAL DIMENSIONS | |||||||
| PART # | A | B | C | D | G | F | BOLT | |
| 12" HOWA HO7-MA-12 |
JN-143-M JN-143-A |
2-1/16 | 1.250 | 1.040 | .708 18MM |
.530 | 1.181 | 14MM 9/16-12 |
| 18" - 20" HOWA HOWA HO27M-18 |
JN-183-M JN-183-A |
3-1/4 | 1.575 | 1.339 | 1.022 26MM |
.669 | 1.968 | 20MM 3/4-10 |
| 18" KITAGAWA | JN-203-A | 3-1/4 | 1.375 | 1.375 | .984 | .500 | 1.907 | 3/4-10 |
| 21" KITAGAWA | JN-213-A | 3-3/4 | 1.375 | 1.375 | .984 | .500 | 3.362 | 3/4-10 |
| 24" KITAGAWA | JN-223-A | 4-3/4 | 1.375 | 1.375 | .984 | .500 | 3.150 | 3/4-10 |
| 15" - 18" MATSUMATO | JN-153-A | 3-5/32 | 1.500 | 1.330 | .864 | .750 | 1.960 | 3/4-10 |
| 12" PRATT BURNERD | JN-265-12 | 2-1/2 | 1.060 | 1.220 | .825 | .438 | 1.250 | 5/8-11 |
| TO FIT SMW CHUCKS |
| CHUCK SIZE | PART NO. | H | D | CRITICAL DIMENSIONS | WT. (lbs.) |
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| B | E | F | G | |||||
| HEIGHT | DIAMETER | BOLT SPACING | BOLT SIZE | |||||
| 12 | JK224 | 1.168 | 1.10 | .825 | .425 | - | 1/2-13 | .3 |
| 16-20 | JK225 | 1.340 | 1.34 | 1.002 | .575 | - | 3/4-10 | .5 |
| TO FIT CHUCKS WITH 1/16 x 90º SERRATIONS |
| CHUCK SIZE | PART NO. | L | H | W | CRITICAL DIMENSIONS | WT. (lbs.) |
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| B | E | F | G | ||||||
| LENGTH | HEIGHT | WIDTH | BOLT SPACING | BOLT SIZE | |||||
| 6 | JK232 | 5/8 | .581 | .530 | .432 | .252 | - | 5/16-18 | .1 |
| 8 | JK233 | 3/4 | .606 | .750 | .550 | .252 | - | 3/8-16 | .1 |
| 12 | JK235 | 1 | .850 | 1.000 | .786 | .325 | - | 1/2-13 | .2 |
| 14 | JK236 | 1-1/8 | 1.000 | 1.000 | .826 | .430 | - | 5/8-11 | .2 |
| TO FIT CHUCKS WITH ACME SERRATED MASTER KEYS |
| CHUCK SIZE | PART NO. | L | H | W | CRITICAL DIMENSIONS | WT. (lbs.) |
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| B | E | F | G | ||||||
| LENGTH | HEIGHT | WIDTH | BOLT SPACING | BOLT SIZE | |||||
| 10 | CL213 | 2-1/2 | 5/8 | 15/16 | .678 | .381 | 1-3/4 | 1/2-13 | .5 |
| 12 | CL215 | 3 | 3/4 | 1-1/16 | .802 | .440 | 2 | 5/8-11 | .5 |
| 15-18 | CL217 | 3-1/2 | 7/8 | 1-1/4 | .933 | .550 | 2-1/2 | 3/4-10 | .8 |
| 21-24 | CL219 | 4-1/4 | 1-3/16 | 1-9/16 | 1.159 | .684 | 3 | 7/8-9 | 1.3 |
| TO FIT CHUCKS WITH SQUARE SERRATED MASTER KEYS |
| CHUCK SIZE | PART NO. | L | H | W | CRITICAL DIMENSIONS | WT. (lbs.) |
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| B | E | F | G | ||||||
| LENGTH | HEIGHT | WIDTH | BOLT SPACING | BOLT SIZE | |||||
| 8 | JN-SP-8 | 2-1/8 | .996 | .875 | .498 | .875 | 1-7/16 | 3/8-16 | .4 |
| 8 | BE203 | 2-7/16 | 1 | 1 | .750 | .375 | 1-3/4 | 1/2-13 | .5 |
| 10-12 | BE204 | 2-1/2 | 1 | 1 | .750 | .375 | 1-3/4 | 5/8-11 | .5 |
| 15-18 | BE207 | 3-3/4 | 1-1/4 | 1-1/4 | 1.000 | .437 | 2-1/2 | 3/4-10 | 1.2 |
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