To purchase parts for the 420BU (Main Assembly RF058000):
- Reference the part needed from the parts diagram and refer to the parts list below.
- Copy the Part Number and paste it into the search window above to see availability and pricing.
- Confirm your parts selection and "Add To Cart".

Item | Part Number | Description | QTY | Item | Part Number | Description | QTY | |
1A | MP371800 | REGULATOR, STND MDL, ASM. | 1 | 14 | NB3267 | NUT, LOCK, 3/8", NC | 3 | |
1B | MP509500 | REGULATOR ASM, SAFE-STOP | 1 | 15 | NB6044 | SCREW, CAP, 3/8 X 1 1/4 | 3 | |
2 | MP367500 | TRAY, BATTERY, 5-1/4 X 3-1/2 | 1 | 16 | NB6111 | WASHER, LOCK, 5/16" | 3 | |
3 | NB6545 | SCREW, CAP, HH, 5/16"-18 X 1" | 6 | 17 | MP6600 | VELCRO, FELT, BLACK | 15" | |
4 | NB9267 | WASHER, FLAT, 5/16" | 8 | 18 | MP6600 | VELCRO, FELT, BLACK | 12" | |
5 | NB3265 | NUT, LOCK, 5/16"-18, NC | 4 | 19 | MP4515 | TUBING, OIL DRAIN | 1.5 FT | |
6 | MP362200 | BATTERY, 12V, 210CCA, AGM | 1 | 20 | NB1621 | CAPLUG, K8, RED | 1 | |
7 | MP368100 | STRAP, 2" x 23", OPEN ENDS | 3 | 21 | NB6530 | SCREW, CAP, HH, 1/4-20 X 1 | 2 | |
8 | NB019100 | BOLT, HEX, 1/4-20 X 3/4, GD 5 | 2 | 22 | MP367600 | SLIDE, STRAP, 2", BLK | 1 | |
9 | NB3350 | WASHER, FLAT, 1/4" | 7 | 23 | NB7282 | CLAMP, HOSE, NO.38 | 1 | |
10 | NB3275 | NUT, LOCK, 1/4" | 2 | 24 | NB065100 | BOLT, HEX, M8 x 25, GD 8.8, ZINC | 1 | |
11 | NB6110 | WASHER, LOCK, 1/4" | 2 | 25 | NB8125 | CLAMP, 1/4" ID, RETAINER | 1 | |
12 | NB5520 | BOLT, CARRIAGE, 3/8"-16 X 1 1/4" | 3 | 26 | NB064900 | SCREW, #10 x 1/2", TRUSS HD, PHIL. | 1 | |
13 | NB3450 | WASHER, FLAT, 3/8" | 6 | 27 | NB065800 | PLUG, HOLE, 5/16", BLK | 1 |