| Allied Electronics | 70150081 | 1 | | 1 | |
| 1Source | KTK-6 | 1 | | 1 | |
| RS Online | 8511208 | 1 | | 1 | |
 Walker Industrial | KTK-6 | 10 | 3 to 5 Days | 10 | 1 @ $32.48 |
 Platt.com | 0008718 | 1 | 53 | 1 | 1 @ $30.01 |
 Carlton Bates Company | 05171242016 | 1 | | 1 | 1 @ $21.31 |
| Fuses Unlimited | KTK-6 | 1 | 79 | 1 | |
| MRO Supply | 1376041 | 1 | | 1 | |
 AI Consolidated | KTK-6-BUSSMANN | 1 | -2 | 1 | 1 @ $18.03 |
 Digi-Key | 283-2464-ND | 1 | 4 | 1 | 1 @ $28.48, 5 @ $27.12, 10 @ $25.09, 50 @ $21.70, 100 @ $20.34, 250 @ $18.98, 500 @ $17.63, 1000 @ $16.95 |
| FinditParts | 5950719 | 1 | | 1 | |
 Walmart | 171264763 | 1 | | 1 | 1 @ $19.65 |
 swatee.com | KTK-6 | 1 | 4 | 1 | 1 @ $39.55 |
| Monarch Electric | 58126 | 1 | | 1 | |
 4 Star Electronics | KTK6 | 1 | | 1 | |
 Tundra | 381437 | 1 | | 1 | 1 @ $26.60 |
 Raptor Supplies | AE2FJL | 1 | | 1 | 1 @ $13.32 |
 AmazonTP | B07DF4ML2Q | 1 | | 1 | 1 @ $26.83 |
 AmazonTP | B011NJ4PKC | 1 | | 1 | 1 @ $424.06 |
 AmazonTP | B0025QGBWS | 1 | | 1 | 1 @ $9.53 |
| AmazonSC | B0195UNIHC | 1 | | 1 | |
 Newark | 18J5861 | 1 | 175 | 1 | 1 @ $54.58, 5 @ $51.85, 10 @ $40.55, 25 @ $30.26, 50 @ $24.15, 100 @ $20.37 |
| AmazonSC | B07DF4ML2Q | 1 | | 1 | |
 Amazon | B00GRKJ8FA | 1 | | 1 | |
| Newark | 63R7762 | 1 | | 1 | |
 Onlinecomponents.com | KTK-6 | 1 | 7 | 1 | 1 @ $29.49, 10 @ $25.09, 100 @ $21.83, 1000 @ $21.28, 10000 @ $21.28 |
| Mouser | 504-KTK-6 | 1 | 15 | 1 | 1 @ $30.18, 10 @ $26.59, 100 @ $21.55, 1000 @ $20.12, 10000 @ $20.12 |
| Guardian | KTK-6 | 1 | | 1 | |
| uri.com | KTK6 | 1 | -2 | 1 | 1 @ $35.10 |
 kempstoncontrols.co.uk | KTK-6 | 1 | 66 | 1 | 1 @ $22.35 |
| standardelectricsupply.com | 8087 | 1 | | 1 | 1 @ $371.10 |
 Kelly Hayes | KTK-6 | 1 | 3 | 1 | 1 @ $16.06 |
 bakedeco.com | 38-1437 | 1 | -2 | 1 | 1 @ $47.45 |
 turtle.com | BUS KTK-6 | 1 | -2 | 1 | 1 @ $14.03 |
 Radwell | KTK-6 | 10 | 196 | 10 | 1 @ $34.00 |
 steinerelectric.com | 5017 | 1 | | 1 | 1 @ $26.23 |
| Widespread | KTK-6 | 1 | | 1 | |
 superbreakers.com | KTK-6 | 1 | -2 | 1 | 1 @ $8.64 |
 grainger.ca | BUSKTK6 | 1 | | 1 | |
| turtle.com | BST KTK-6 | 1 | -2 | 1 | 1 @ $0.00 |
| Hutch and Son | KTK-6 | 1 | | 1 | |
| Crescent Electric Supply Co | 2140069 | 1 | | 1 | |
 Tedss | 2026002721 | 1 | -2 | 1 | 1 @ $19.99 |
| galesburgelectric.com | KTK-6 | 1 | | 1 | |
| RS Delivers | 851-1208 | 1 | 72 | 1 | 1 @ $32.12, 5 @ $29.87, 25 @ $27.91, 50 @ $26.22, 100 @ $24.70 |
| Guardian | KTK6 | 1 | | 1 | |
 Galco | KTK-6-BUSS | 1 | 2 | 1 | 1 @ $17.32 |
 globalcommercialparts.com | BUS_KTK6 | 1 | 2 | 1 | 1 @ $21.62 |
| Crescent Electric Supply Co | KTK-6 | 1 | | 1 | |
| us.rs-online.com | 70150081 | 1 | 66 | 1 | 1 @ $49.20, 5 @ $46.85, 10 @ $43.34, 50 @ $37.48, 100 @ $35.14, 200 @ $32.80 |
 mostelectric.com | KTK-6 | 1 | | 1 | |
 National Supply Network | 74974106 | 10 | -2 | 10 | 1 @ $29.88 |
 Allfuses | KTK-6 | 1 | 532 | 1 | 1 @ $8.14 |
 crescentelectric.com | 159998 | 1 | | 1 | 1 @ $37.85 |
| Airline Hydraulics | BUSSMANN KTK-6 | 1 | | 1 | 1 @ $56.25 |
 Zoro | G3135343 | 1 | 2295 | 1 | 1 @ $15.84 |
 simsupply.com | ZO-G3135343 | 1 | 797 | 1 | 1 @ $24.72 |
| Grainger | 4XC41 | 1 | | 1 | |
