| MRO Supply | 1376032 | 1 | | 1 | |
 Onlinecomponents.com | KTK-1 | 1 | 23 | 1 | 1 @ $22.76, 5 @ $20.87, 10 @ $19.26, 25 @ $18.41, 50 @ $17.63, 100 @ $16.47, 250 @ $16.05 |
| Allied Electronics | 70149406 | 1 | | 1 | |
| Future Electronics | 1028367 | 10 | | 10 | 10 @ $29.28, 5 @ $24.52, 10 @ $22.72, 25 @ $20.54, 50 @ $19.03 |
 NEP Electronics | KTK-1 | 1 | 5 | 1 | 1 @ $5.00, 5 @ $3.00 |
| Waytek | 45273 | 1 | | 1 | |
 Walker Industrial | KTK-1 | 10 | 3 to 5 Days | 10 | 1 @ $33.40 |
 Platt.com | 0008705 | 1 | 22 | 1 | 1 @ $30.87 |
| Fuses Unlimited | KTK-1 | 1 | 593 | 1 | |
| Bisco | KTK-1 | 1 | | 1 | |
 Carlton Bates Company | 05171242010 | 1 | | 1 | 1 @ $21.91 |
 AI Consolidated | KTK-1-BUSSMANN | 1 | -2 | 1 | 1 @ $18.54 |
 NRI Industrial | B478087 | 1 | | 1 | 1 @ $27.48 |
 Digi-Key | 283-3106-ND | 1 | 12 | 1 | |
| 1Source | KTK-1 | 1 | | 1 | |
 4 Star Electronics | KTK1 | 1 | | 1 | |
| Monarch Electric | 58102 | 1 | | 1 | 1 @ $17.94 |
| FinditParts | 5950476 | 1 | | 1 | |
 Raptor Supplies | AE2FJG | 1 | | 1 | 1 @ $12.50 |
 AmazonTP | B01AKS4SOK | 1 | | 1 | 1 @ $42.95 |
 Newark | 28F197 | 1 | | 1 | 1 @ $56.13, 5 @ $53.33, 10 @ $40.34, 25 @ $30.12, 50 @ $24.02, 100 @ $20.27 |
| RS Online | 4588504 | 1 | | 1 | |
| Guardian | KTK-1 | 1 | | 1 | |
 kempstoncontrols.co.uk | KTK-1 | 1 | 52 | 1 | 1 @ $41.89 |
| standardelectricsupply.com | 8074 | 1 | | 1 | 1 @ $381.70 |
 Kelly Hayes | KTK-1 | 1 | | 1 | 1 @ $16.51 |
| Widespread | KTK-1 | 1 | | 1 | |
| Newark | 27P6338 | 1 | | 1 | |
 bakedeco.com | 38-1429 | 1 | -2 | 1 | 1 @ $48.90 |
| Hutch and Son | KTK-1 | 1 | | 1 | |
 turtle.com | BUS KTK-1 | 1 | -2 | 1 | 1 @ $14.43 |
| Crescent Electric Supply Co | 2147961 | 1 | | 1 | |
 Zoro | G005658777 | 1 | -2 | 1 | 1 @ $73.51 |
 grainger.ca | BUSKTK1 | 1 | | 1 | 1 @ $37.09 |
| galesburgelectric.com | KTK-1 | 1 | | 1 | |
| RS Delivers | 458-8504 | 1 | 220 | 1 | 1 @ $16.06 |
| Guardian | KTK1 | 1 | | 1 | |
 Galco | KTK-1-BUSS | 1 | | 1 | 1 @ $13.43 |
 globalcommercialparts.com | BUS_KTK1 | 1 | | 1 | 1 @ $22.28 |
| Crescent Electric Supply Co | KTK-1 | 1 | | 1 | |
 NRI Industrial | D706489 | 1 | | 1 | 1 @ $27.48 |
| us.rs-online.com | 70149406 | 1 | 20 | 1 | 1 @ $50.60, 5 @ $48.19, 10 @ $44.58, 50 @ $38.55, 100 @ $36.14, 200 @ $33.73 |
 Tedss | 2026001897 | 1 | -2 | 1 | 1 @ $21.99 |
 National Supply Network | 74973926 | 10 | -2 | 10 | 1 @ $30.44 |
 Allfuses | KTK-1 | 1 | 422 | 1 | 1 @ $8.09 |
| Digi-Key | 1877780 | 1 | | 1 | 1 @ $53.97, 5 @ $51.28, 10 @ $48.58, 50 @ $40.48, 100 @ $37.78, 250 @ $35.08 |
 crescentelectric.com | 133486 | 1 | 7 | 1 | 1 @ $38.93 |
 superbreakers.com | KTK-1 | 1 | 58 | 1 | 1 @ $8.64 |
 ace4parts.com | KTK-1 | 1 | 11 | 1 | 1 @ $27.66 |
| Airline Hydraulics | BUSSMANN KTK-1 | 1 | | 1 | 1 @ $57.85 |
 Zoro | G0875953 | 1 | 1211 | 1 | 1 @ $16.29 |
| Grainger | 4XC37 | 1 | | 1 | |
