| MRO Supply | 1376073 | 1 | | 1 | |
| Onlinecomponents.com | KTK-R-6 | 1 | | 1 | 1 @ $23.44, 2 @ $21.28, 11 @ $19.76, 21 @ $18.44, 51 @ $17.73 |
 Zoro | G3214696 | 1 | 1641 | 1 | 1 @ $24.44 |
| Allied Electronics | 70150958 | 1 | | 1 | |
| 1Source | KTK-R-6 | 1 | | 1 | |
| RS Online | 8483920 | 1 | | 1 | |
 Walker Industrial | KTK-R-6 | 10 | 3 to 5 | 10 | 1 @ $24.44 |
 Platt.com | 0008699 | 1 | 62 | 1 | 1 @ $27.29 |
 Carlton Bates Company | 05171242065 | 1 | | 1 | 1 @ $25.21 |
| Fuses Unlimited | KTK-R-6 | 1 | 70 | 1 | |
 AI Consolidated | KTK-R-6-BUSSMANN | 1 | -2 | 1 | 1 @ $21.33 |
 Digi-Key | 283-3462-ND | 1 | 3 | 1 | 1 @ $31.77, 5 @ $30.26, 10 @ $27.99, 50 @ $24.21, 100 @ $22.70, 250 @ $21.79 |
 Newark | 63R7747 | 1 | 4 | 1 | 1 @ $60.37, 5 @ $57.36, 10 @ $54.34, 25 @ $49.82, 50 @ $45.28, 100 @ $43.05 |
| Future Electronics | 6028370 | 10 | | 10 | 10 @ $31.29, 5 @ $27.81, 25 @ $24.72 |
| swatee.com | KTK-R-6 | 1 | 3 | 1 | 1 @ $40.51 |
| Monarch Electric | 58236 | 1 | | 1 | 1 @ $22.49 |
 AmazonTP | B01MUEOVLO | 1 | | 1 | 1 @ $25.33 |
 AmazonTP | B002090MDE | 1 | | 1 | 1 @ $10.60 |
 AmazonTP | B01LAX19C8 | 1 | | 1 | 1 @ $10.60 |
 Raptor Supplies | AE8QMK | 1 | | 1 | 1 @ $16.75 |
 bscsource.com | KTKR6 | 1 | | 1 | 1 @ $21.29 |
 Newark | 01P3607 | 1 | 15 | 1 | 1 @ $60.37, 5 @ $57.36, 10 @ $54.34, 25 @ $49.82, 50 @ $45.28, 100 @ $43.05 |
| French Gerleman | BUSSKTKR6 | 1 | | 1 | |
| Guardian | KTK-R-6 | 1 | | 1 | |
 kempstoncontrols.co.uk | KTK-R-6 | 1 | 74 | 1 | 1 @ $48.06 |
| standardelectricsupply.com | 8071 | 1 | | 1 | |
 Kelly Hayes | KTK-R-6 | 1 | 6 | 1 | 1 @ $17.76 |
 steinerelectric.com | 5038 | 1 | | 1 | 1 @ $32.01 |
| Hutch and Son | KTK-R-6 | 1 | | 1 | |
 turtle.com | BUS KTK-R-6 | 1 | -2 | 1 | 1 @ $15.53 |
| Crescent Electric Supply Co | 1900774 | 1 | | 1 | |
| borderstates.com | 113620 | 1 | | 1 | |
 galesburgelectric.com | KTK-R-6 | 1 | -2 | 1 | 1 @ $11.66 |
| RS Delivers | 848-3920 | 1 | | 1 | 1 @ $44.71, 5 @ $41.58, 25 @ $38.90, 50 @ $36.48, 100 @ $34.38 |
| Guardian | KTKR6 | 1 | | 1 | |
 Galco | KTK-R-6-BUSS | 1 | 13 | 1 | 1 @ $24.44 |
 globalcommercialparts.com | BUS_KTKR6 | 1 | 13 | 1 | 1 @ $24.18 |
| Crescent Electric Supply Co | KTK-R-6 | 1 | | 1 | |
| us.rs-online.com | 70150958 | 1 | 55 | 1 | 1 @ $51.32, 5 @ $48.75, 10 @ $46.19, 50 @ $38.49 |
| Airline Hydraulics | BUSSMANN KTK-R-6 | 1 | 324 | 1 | 1 @ $72.11 |
 Tedss | 2026001304 | 1 | -2 | 1 | 1 @ $21.86 |
 mostelectric.com | KTK-R-6 | 1 | | 1 | |
 mayerelectric.com | BUSKTKR6 | 1 | | 1 | |
 National Supply Network | 74760463 | 10 | -2 | 10 | 1 @ $39.90 |
 Allfuses | KTK-R-6 | 1 | | 1 | 1 @ $11.14 |
| Digi-Key | 1877817 | 1 | 10 | 1 | 1 @ $50.19, 5 @ $47.80, 10 @ $44.22, 50 @ $38.24, 100 @ $35.85, 250 @ $34.08 |
 superbreakers.com | KTK-R-6 | 1 | 35 | 1 | 1 @ $14.79 |
 Component Electronics | 505-246 | 1 | 2 | 1 | 1 @ $38.46, 50 @ $32.69, 100 @ $28.85, 500 @ $26.92, 1000 @ $25.00 |
 Elliott Electric | KTKR6 | 1 | Call for Availability | 1 | 1 @ $35.33 |
