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Parallel Key
Keys transmit torque between a shaft and a hub through matching keyways — the cheapest and most common shaft-hub connection.
- 2137 sizes・682 in stock
Browse by type
SS316 Parallel Key1 sizes
S45C Steel Double Round-End Key715 sizes・261 in stock
SS304 Double Round-End Key252 sizes・86 in stock
INCH S45C Steel Double Round-End Key2 sizes・2 in stock
S45C Steel Single Round-End Key643 sizes・116 in stock
SS304 Single Round-End Key225 sizes・45 in stock
SS316 Single Round-End Key2 sizes・1 in stock
" Heat Treated " S45C Steel Single Round-End Key1 sizes・1 in stock
INCH S45C Steel Single Round-End Key6 sizes・4 in stock
S45C Steel Parallel Key Bar Stock129 sizes・74 in stock
SS304 Parallel Key Bar Stock90 sizes・43 in stock
SS316 Parallel Key Bar Stock2 sizes・1 in stock
Carbon Steel Woodruff Key24 sizes・24 in stock
INCH S45C Steel Parallel Key Bar Stock29 sizes・15 in stock
INCH SS304 Parallel Key Bar Stock16 sizes・9 in stockHow to choose
S45C medium carbon steel The standard, strong and inexpensive.
304 stainless Food machinery and wet environments.
316 stainless Chemical and marine service.
- Size is width x height x length; width and height follow shaft diameter.
- Buy long and cut to length rather than short.
- For reversing drives consider two keys or a locking assembly.
Parallel Keys / Single-Round-End / Round-End / Woodruff Keys: End Shapes and Stock in TaiwanS45C Steel Double Round-End Key size chart (716 sizes)S45C Steel Single Round-End Key size chart (649 sizes)SS304 Double Round-End Key size chart (252 sizes)SS304 Single Round-End Key size chart (225 sizes)S45C Steel Parallel Key size chart (156 sizes)SS304 Parallel Key size chart (106 sizes)Carbon Steel Woodruff Key size chart (24 sizes)
All items
2137 items, grouped by type. Tap a group to expand.
SS316 Parallel Key1 items
S45C Steel Double Round-End Key715 items
S45C Steel Double Round-End Key 10*10*100S45C Steel Double Round-End Key 10*10*105S45C Steel Double Round-End Key 10*10*110S45C Steel Double Round-End Key 10*10*115S45C Steel Double Round-End Key 10*10*120S45C Steel Double Round-End Key 10*10*125S45C Steel Double Round-End Key 10*10*130S45C Steel Double Round-End Key 10*10*135S45C Steel Double Round-End Key 10*10*140S45C Steel Double Round-End Key 10*10*145S45C Steel Double Round-End Key 10*10*15S45C Steel Double Round-End Key 10*10*150S45C Steel Double Round-End Key 10*10*16S45C Steel Double Round-End Key 10*10*160S45C Steel Double Round-End Key 10*10*170S45C Steel Double Round-End Key 10*10*18S45C Steel Double Round-End Key 10*10*180S45C Steel Double Round-End Key 10*10*190S45C Steel Double Round-End Key 10*10*20S45C Steel Double Round-End Key 10*10*200S45C Steel Double Round-End Key 10*10*25S45C Steel Double Round-End Key 10*10*28S45C Steel Double Round-End Key 10*10*30S45C Steel Double Round-End Key 10*10*35S45C Steel Double Round-End Key 10*10*40S45C Steel Double Round-End Key 10*10*45S45C Steel Double Round-End Key 10*10*50S45C Steel Double Round-End Key 10*10*55S45C Steel Double Round-End Key 10*10*60S45C Steel Double Round-End Key 10*10*65S45C Steel Double Round-End Key 10*10*70S45C Steel Double Round-End Key 10*10*75S45C Steel Double Round-End Key 10*10*80S45C Steel Double Round-End Key 10*10*85S45C Steel Double Round-End Key 10*10*90S45C Steel Double Round-End Key 10*10*95S45C Steel Double Round-End Key 10*8*100S45C Steel Double Round-End Key 10*8*105S45C Steel Double Round-End Key 10*8*110S45C Steel Double Round-End Key 10*8*115S45C Steel Double Round-End Key 10*8*120S45C Steel Double Round-End Key 10*8*125S45C Steel Double Round-End Key 10*8*130S45C Steel Double Round-End Key 10*8*135S45C Steel Double Round-End Key 10*8*140S45C Steel Double Round-End Key 10*8*145S45C Steel Double Round-End Key 10*8*15S45C Steel Double Round-End Key 10*8*150S45C Steel Double Round-End Key 10*8*155S45C Steel Double Round-End Key 10*8*16S45C Steel Double Round-End Key 10*8*160S45C Steel Double Round-End Key 10*8*170S45C Steel Double Round-End Key 10*8*18S45C Steel Double Round-End Key 10*8*180S45C Steel Double Round-End Key 10*8*190S45C Steel Double Round-End Key 10*8*20S45C Steel Double Round-End Key 10*8*200S45C Steel Double Round-End Key 10*8*22S45C Steel Double Round-End Key 10*8*25S45C Steel Double Round-End Key 10*8*28…see all 715 items →
SS304 Double Round-End Key252 items
SS304 Double Round-End Key 10*10*100SS304 Double Round-End Key 10*10*18SS304 Double Round-End Key 10*10*20SS304 Double Round-End Key 10*10*25SS304 Double Round-End Key 10*10*30SS304 Double Round-End Key 10*10*35SS304 Double Round-End Key 10*10*40SS304 Double Round-End Key 10*10*45SS304 Double Round-End Key 10*10*50SS304 Double Round-End Key 10*10*55SS304 Double Round-End Key 10*10*60SS304 Double Round-End Key 10*10*65SS304 Double Round-End Key 10*10*70SS304 Double Round-End Key 10*10*75SS304 Double Round-End Key 10*10*80SS304 Double Round-End Key 10*10*85SS304 Double Round-End Key 10*10*90SS304 Double Round-End Key 10*8*100SS304 Double Round-End Key 10*8*15SS304 Double Round-End Key 10*8*18SS304 Double Round-End Key 10*8*20SS304 Double Round-End Key 10*8*25SS304 Double Round-End Key 10*8*30SS304 Double Round-End Key 10*8*35SS304 Double Round-End Key 10*8*38SS304 Double Round-End Key 10*8*40SS304 Double Round-End Key 10*8*45SS304 Double Round-End Key 10*8*50SS304 Double Round-End Key 10*8*55SS304 Double Round-End Key 10*8*60SS304 Double Round-End Key 10*8*65SS304 Double Round-End Key 10*8*70SS304 Double Round-End Key 10*8*75SS304 Double Round-End Key 10*8*80SS304 Double Round-End Key 10*8*85SS304 Double Round-End Key 10*8*90SS304 Double Round-End Key 12*8*100SS304 Double Round-End Key 12*8*20SS304 Double Round-End Key 12*8*25SS304 Double Round-End Key 12*8*30SS304 Double Round-End Key 12*8*35SS304 Double Round-End Key 12*8*40SS304 Double Round-End Key 12*8*45SS304 Double Round-End Key 12*8*50SS304 Double Round-End Key 12*8*55SS304 Double Round-End Key 12*8*60SS304 Double Round-End Key 12*8*65SS304 Double Round-End Key 12*8*70SS304 Double Round-End Key 12*8*75SS304 Double Round-End Key 12*8*80SS304 Double Round-End Key 12*8*85SS304 Double Round-End Key 12*8*90SS304 Double Round-End Key 14*8*40SS304 Double Round-End Key 14*9*100SS304 Double Round-End Key 14*9*25SS304 Double Round-End Key 14*9*30SS304 Double Round-End Key 14*9*35SS304 Double Round-End Key 14*9*40SS304 Double Round-End Key 14*9*45SS304 Double Round-End Key 14*9*50…see all 252 items →
INCH S45C Steel Double Round-End Key2 items
S45C Steel Single Round-End Key643 items
S45C Steel Single Round-End Key 10*10*100S45C Steel Single Round-End Key 10*10*105S45C Steel Single Round-End Key 10*10*110S45C Steel Single Round-End Key 10*10*115S45C Steel Single Round-End Key 10*10*120S45C Steel Single Round-End Key 10*10*125S45C Steel Single Round-End Key 10*10*130S45C Steel Single Round-End Key 10*10*135S45C Steel Single Round-End Key 10*10*140S45C Steel Single Round-End Key 10*10*145S45C Steel Single Round-End Key 10*10*15S45C Steel Single Round-End Key 10*10*150S45C Steel Single Round-End Key 10*10*16S45C Steel Single Round-End Key 10*10*160S45C Steel Single Round-End Key 10*10*170S45C Steel Single Round-End Key 10*10*18S45C Steel Single Round-End Key 10*10*180S45C Steel Single Round-End Key 10*10*190S45C Steel Single Round-End Key 10*10*20S45C Steel Single Round-End Key 10*10*200S45C Steel Single Round-End Key 10*10*25S45C Steel Single Round-End Key 10*10*28S45C Steel Single Round-End Key 10*10*30S45C Steel Single Round-End Key 10*10*35S45C Steel Single Round-End Key 10*10*40S45C Steel Single Round-End Key 10*10*45S45C Steel Single Round-End Key 10*10*50S45C Steel Single Round-End Key 10*10*55S45C Steel Single Round-End Key 10*10*60S45C Steel Single Round-End Key 10*10*65S45C Steel Single Round-End Key 10*10*70S45C Steel Single Round-End Key 10*10*75S45C Steel Single Round-End Key 10*10*80S45C Steel Single Round-End Key 10*10*85S45C Steel Single Round-End Key 10*10*90S45C Steel Single Round-End Key 10*10*95S45C Steel Single Round-End Key 10*8*100S45C Steel Single Round-End Key 10*8*105S45C Steel Single Round-End Key 10*8*110S45C Steel Single Round-End Key 10*8*115S45C Steel Single Round-End Key 10*8*120S45C Steel Single Round-End Key 10*8*125S45C Steel Single Round-End Key 10*8*130S45C Steel Single Round-End Key 10*8*135S45C Steel Single Round-End Key 10*8*140S45C Steel Single Round-End Key 10*8*145S45C Steel Single Round-End Key 10*8*15S45C Steel Single Round-End Key 10*8*150S45C Steel Single Round-End Key 10*8*16S45C Steel Single Round-End Key 10*8*160S45C Steel Single Round-End Key 10*8*170S45C Steel Single Round-End Key 10*8*18S45C Steel Single Round-End Key 10*8*180S45C Steel Single Round-End Key 10*8*190S45C Steel Single Round-End Key 10*8*20S45C Steel Single Round-End Key 10*8*200S45C Steel Single Round-End Key 10*8*25S45C Steel Single Round-End Key 10*8*28S45C Steel Single Round-End Key 10*8*30S45C Steel Single Round-End Key 10*8*35…see all 643 items →
SS304 Single Round-End Key225 items
SS304 Single Round-End Key 10*10*100SS304 Single Round-End Key 10*10*18SS304 Single Round-End Key 10*10*20SS304 Single Round-End Key 10*10*25SS304 Single Round-End Key 10*10*30SS304 Single Round-End Key 10*10*35SS304 Single Round-End Key 10*10*40SS304 Single Round-End Key 10*10*45SS304 Single Round-End Key 10*10*50SS304 Single Round-End Key 10*10*55SS304 Single Round-End Key 10*10*60SS304 Single Round-End Key 10*10*65SS304 Single Round-End Key 10*10*70SS304 Single Round-End Key 10*10*75SS304 Single Round-End Key 10*10*80SS304 Single Round-End Key 10*10*85SS304 Single Round-End Key 10*10*90SS304 Single Round-End Key 10*8*100SS304 Single Round-End Key 10*8*15SS304 Single Round-End Key 10*8*18SS304 Single Round-End Key 10*8*20SS304 Single Round-End Key 10*8*25SS304 Single Round-End Key 10*8*30SS304 Single Round-End Key 10*8*35SS304 Single Round-End Key 10*8*40SS304 Single Round-End Key 10*8*45SS304 Single Round-End Key 10*8*50SS304 Single Round-End Key 10*8*55SS304 Single Round-End Key 10*8*60SS304 Single Round-End Key 10*8*65SS304 Single Round-End Key 10*8*70SS304 Single Round-End Key 10*8*75SS304 Single Round-End Key 10*8*80SS304 Single Round-End Key 10*8*85SS304 Single Round-End Key 10*8*90SS304 Single Round-End Key 12*8*100SS304 Single Round-End Key 12*8*20SS304 Single Round-End Key 12*8*25SS304 Single Round-End Key 12*8*30SS304 Single Round-End Key 12*8*35SS304 Single Round-End Key 12*8*40SS304 Single Round-End Key 12*8*45SS304 Single Round-End Key 12*8*50SS304 Single Round-End Key 12*8*55SS304 Single Round-End Key 12*8*60SS304 Single Round-End Key 12*8*65SS304 Single Round-End Key 12*8*70SS304 Single Round-End Key 12*8*75SS304 Single Round-End Key 12*8*80SS304 Single Round-End Key 12*8*85SS304 Single Round-End Key 12*8*90SS304 Single Round-End Key 14*9*100SS304 Single Round-End Key 14*9*25SS304 Single Round-End Key 14*9*30SS304 Single Round-End Key 14*9*35SS304 Single Round-End Key 14*9*40SS304 Single Round-End Key 14*9*45SS304 Single Round-End Key 14*9*50SS304 Single Round-End Key 14*9*55SS304 Single Round-End Key 14*9*60…see all 225 items →
SS316 Single Round-End Key2 items
" Heat Treated " S45C Steel Single Round-End Key1 items
INCH S45C Steel Single Round-End Key6 items
S45C Steel Single Round-End Key 1/4"*1/4"*16S45C Steel Single Round-End Key 1/4"*1/4"*15S45C Steel Single Round-End Key 1/8"*1/8"*1"S45C Steel Single Round-End Key 3/16"*3/16"*1"S45C Steel Single Round-End Key 3/16"*3/16"*2"S45C Steel Single Round-End Key 3/4"*9/16"*166.7Open the full page for this type →
S45C Steel Parallel Key Bar Stock129 items
S45C Steel Parallel Key 10*10*300S45C Steel Parallel Key 10*5*300S45C Steel Parallel Key 10*6*300S45C Steel Parallel Key 10*7*300S45C Steel Parallel Key 10*8*300S45C Steel Parallel Key 10*9*300S45C Steel Parallel Key 12*10*300S45C Steel Parallel Key 12*12*300S45C Steel Parallel Key 12*5*300S45C Steel Parallel Key 12*6*300S45C Steel Parallel Key 12*7*300S45C Steel Parallel Key 12*8*300S45C Steel Parallel Key 12*9*300S45C Steel Parallel Key 13*10*300S45C Steel Parallel Key 13*13*300S45C Steel Parallel Key 14*10*300S45C Steel Parallel Key 14*11*300S45C Steel Parallel Key 14*12*300S45C Steel Parallel Key 14*14*300S45C Steel Parallel Key 14*7*300S45C Steel Parallel Key 14*8*300S45C Steel Parallel Key 14*9*300S45C Steel Parallel Key 15*10*300S45C Steel Parallel Key 15*12*300S45C Steel Parallel Key 15*13*300S45C Steel Parallel Key 15*14*300S45C Steel Parallel Key 15*15*300S45C Steel Parallel Key 15*5*300S45C Steel Parallel Key 15*6*300S45C Steel Parallel Key 15*7*300S45C Steel Parallel Key 15*8*300S45C Steel Parallel Key 16*10*300S45C Steel Parallel Key 16*12*300S45C Steel Parallel Key 16*14*300S45C Steel Parallel Key 16*16*300S45C Steel Parallel Key 16*8*300S45C Steel Parallel Key 16*9*300S45C Steel Parallel Key 18*10*300S45C Steel Parallel Key 18*11*300S45C Steel Parallel Key 18*12*300S45C Steel Parallel Key 18*13*300S45C Steel Parallel Key 18*14*300S45C Steel Parallel Key 18*15*300S45C Steel Parallel Key 18*16*300S45C Steel Parallel Key 18*18*300S45C Steel Parallel Key 18*7*300S45C Steel Parallel Key 18*8*300S45C Steel Parallel Key 2*2*300S45C Steel Parallel Key 20*10*300S45C Steel Parallel Key 20*11*300S45C Steel Parallel Key 20*12*300S45C Steel Parallel Key 20*13*300S45C Steel Parallel Key 20*14*300S45C Steel Parallel Key 20*15*300S45C Steel Parallel Key 20*16*300S45C Steel Parallel Key 20*18*300S45C Steel Parallel Key 20*20*300S45C Steel Parallel Key 20*5*300S45C Steel Parallel Key 20*6*300S45C Steel Parallel Key 20*8*300…see all 129 items →
SS304 Parallel Key Bar Stock90 items
SS304 Parallel Key 10*10*300SS304 Parallel Key 10*5*300SS304 Parallel Key 10*6*300SS304 Parallel Key 10*8*300SS304 Parallel Key 11*11*300SS304 Parallel Key 12*10*300SS304 Parallel Key 12*12*300SS304 Parallel Key 12*5*300SS304 Parallel Key 12*6*300SS304 Parallel Key 12*8*300SS304 Parallel Key 13*13*300SS304 Parallel Key 14*10*300SS304 Parallel Key 14*12*300SS304 Parallel Key 14*14*300SS304 Parallel Key 14*6*300SS304 Parallel Key 14*7*300SS304 Parallel Key 14*8*300SS304 Parallel Key 14*9*300SS304 Parallel Key 15*10*300SS304 Parallel Key 15*12*300SS304 Parallel Key 15*15*300SS304 Parallel Key 15*8*300SS304 Parallel Key 16*10*300SS304 Parallel Key 16*12*300SS304 Parallel Key 16*14*300SS304 Parallel Key 16*16*300SS304 Parallel Key 17*17*300SS304 Parallel Key 18*11*300SS304 Parallel Key 18*12*300SS304 Parallel Key 18*14*300SS304 Parallel Key 18*16*300SS304 Parallel Key 18*18*300SS304 Parallel Key 20*10*300SS304 Parallel Key 20*12*300SS304 Parallel Key 20*14*300SS304 Parallel Key 20*15*300SS304 Parallel Key 20*16*300SS304 Parallel Key 20*18*300SS304 Parallel Key 20*20*300SS304 Parallel Key 20*8*300SS304 Parallel Key 22*12*300SS304 Parallel Key 22*14*300SS304 Parallel Key 22*16*300SS304 Parallel Key 22*18*300SS304 Parallel Key 22*20*300SS304 Parallel Key 22*22*300SS304 Parallel Key 24*10*300SS304 Parallel Key 24*12*300SS304 Parallel Key 24*14*300SS304 Parallel Key 24*16*300SS304 Parallel Key 24*18*300SS304 Parallel Key 24*20*300SS304 Parallel Key 24*8*300SS304 Parallel Key 25*10*300SS304 Parallel Key 25*12*300SS304 Parallel Key 25*14*300SS304 Parallel Key 25*16*300SS304 Parallel Key 25*18*300SS304 Parallel Key 25*20*300SS304 Parallel Key 25*8*300…see all 90 items →
SS316 Parallel Key Bar Stock2 items
Carbon Steel Woodruff Key24 items
Carbon Steel Woodruff Key 10*32*13Carbon Steel Woodruff Key 10*38*13Carbon Steel Woodruff Key 10*43*16Carbon Steel Woodruff Key 2*10*3.7Carbon Steel Woodruff Key 2*7*2.6Carbon Steel Woodruff Key 2.5*10*3.7Carbon Steel Woodruff Key 3*10*3.7Carbon Steel Woodruff Key 3*13*5Carbon Steel Woodruff Key 3*16*6.5Carbon Steel Woodruff Key 3*19*7.5Carbon Steel Woodruff Key 4*13*5Carbon Steel Woodruff Key 4*16*6.5Carbon Steel Woodruff Key 4*19*7.5Carbon Steel Woodruff Key 5*16*6.5Carbon Steel Woodruff Key 5*19*7.5Carbon Steel Woodruff Key 5*22*9Carbon Steel Woodruff Key 5*25*10Carbon Steel Woodruff Key 6*22*9Carbon Steel Woodruff Key 6*25*10Carbon Steel Woodruff Key 6*28*11Carbon Steel Woodruff Key 6*32*13Carbon Steel Woodruff Key 8*25*10Carbon Steel Woodruff Key 8*28*11Carbon Steel Woodruff Key 8*32*13Open the full page for this type →
INCH S45C Steel Parallel Key Bar Stock29 items
S45C Steel Parallel Key 1"*1"*300SS400 Parallel Key 1-1/2"*1-1/2"*300S45C Steel Parallel Key 1-1/2"*1-1/2"*350S45C Steel Parallel Key 1-1/4"*5/8"*300S45C Steel Parallel Key 1-1/4"*1"*300S45C Steel Parallel Key 1-1/4"*1-1/4"*300S45C Steel Parallel Key 1-1/8"*1"*300S45C Steel Parallel Key 1-1/8"*1-1/8"*300S45C Steel Parallel Key 1/2"*1/2"*300S45C Steel Parallel Key 1/2"*1/4"*300S45C Steel Parallel Key 1/2"*3/8"*300S45C Steel Parallel Key 1/2"*5/16"*300S45C Steel Parallel Key 1/4"*1/4"*300S45C Steel Parallel Key 1/8"*1/8"*300S45C Steel Parallel Key 17/64"*17/64"*300S45C Steel Parallel Key 3/16"*3/16"*300S45C Steel Parallel Key 3/4"*1/2"*300S45C Steel Parallel Key 3/4"*3/4"*300S45C Steel Parallel Key 3/8"*3/8"*300S45C Steel Parallel Key 3/8"*5/16"*300S45C Steel Parallel Key 5/16"*5/16"*300S45C Steel Parallel Key 5/32*5/32*300S45C Steel Parallel Key 5/8"*3/8"*300S45C Steel Parallel Key 5/8"*5/8"*300S45C Steel Parallel Key 7/16"*3/8"*300S45C Steel Parallel Key 7/16"*7/16"*300S45C Steel Parallel Key 7/8"*7/8"*300S45C Steel Parallel Key 9/16"*3/8"*300S45C Steel Parallel Key 9/16"*9/16"*300Open the full page for this type →
INCH SS304 Parallel Key Bar Stock16 items
SS304 Parallel Key 1"*1"*300SS304 Parallel Key 1/2"*1/2"*300SS304 Parallel Key 1/2"*3/8"*300SS304 Parallel Key 1/4*1/4*300SS304 Parallel Key 1/8"*1/8"*300SS304 Parallel Key 3/16"*3/16"*300SS304 Parallel Key 3/4*3/4*300SS304 Parallel Key 3/8"*3/8"*300SS304 Parallel Key 3/8"*5/16"*300SS304 Parallel Key 5/16"*1/4"*300SS304 Parallel Key 5/16"*5/16"*300SS304 Parallel Key 5/32"*5/32"*300SS304 Parallel Key 5/8"*5/8"*300SS304 Parallel Key 7/16*7/16*300SS304 Parallel Key 7/8"*7/8"*300SS304 Parallel Key 9/16"*9/16"*300Open the full page for this type →
Also known as / standards: Parallel Key · Square Key · Woodruff Key · DIN 6885 · DIN 6885 AB · FORM AB · ROUND END KEY · DIN 6885-1 · ISO 773 · ISO 2491 · JIS B 1301 · CNS 169 · CNS 170 · CNS 175
Standards: DIN 6885-1 · ISO 773 · ISO 2491 · DIN 6885 · JIS B 1301 · CNS 169 · CNS 170 · CNS 175 · ASME B18.25.1M