Product Description
Armstrong Impeller Key – Part No. 974515-400
Genuine Armstrong replacement impeller key, Armstrong part number 974515-400, for Series 4380, 4360 pumps. Shown as item 36 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
Specification: Impeller key (56C frame only); Shaft key (56C frame only)
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 1½ × 1½ × 6, 2 × 2 × 6, 3 × 3 × 6, 1½ × 1½ × 8, 2 × 2 × 8, 3 × 3 × 8
- Motor frames: 56C
- Designation: 'S'
- Drawing item: 36
- Series 4360 (vertical motor mounted) – pump sizes 1½ D, 2 D, 3 D
- Motor frames: 56C
- Drawing item: 36
Other parts for this pump
Rebuilding a Series 4380 1½ × 1½ × 6? These parts are often replaced at the same time:
| Item | Part | Armstrong part no. |
|---|---|---|
| 15 | Set screw | 916517-005 |
| 16 | Set screw | 916519-104 |
| 17 | Set screw | 916517-205 |
| 21 | Shaft extension | 426992-071 |
| 39 | Water slinger | 406622-000 |
| 40 | Stuffing box / adapter | 426746-011 |
| 40 | Stuffing box / adapter | 426746-031 |
| 40 | Stuffing box / adapter | 426747-011 |
| 40 | Stuffing box / adapter | 426747-031 |
| 43 | Motor washer | 927113-100 |
| 44 | Motor capscrew | 911121-108 |
| 44 | Motor capscrew | 911125-108 |
| 57 | Male connector | 939001-114 |
| 59 | Flush line tubing | 997531-004 |
| 62 | Mechanical seal kit | 975000-982 |
| 62 | Mechanical seal kit | 9975001-813 |
| 62 | Mechanical seal kit | 9975001-613 |
| 62 | Mechanical seal kit | 9975001-817 |
| 62 | Mechanical seal kit | 9975001-818 |
| 70 | Shaft sleeve | 425869-001 |
| 71 | Shaft sleeve spacer | 425868-005 |
| 80 | Impeller | 427099-041 |
| 83 | Impeller washer | 425742-001 |
| 86 | Impeller capscrew | 911900-114 |
Showing 24 of 31 parts – see the full list in the parts finder.
Not sure this is the right part?
Use our Armstrong Pump Parts Finder: choose Series 4380, your pump size and motor to see every part on the drawing. Or send us your pump’s nameplate details – call (416) 236-2338 or email sales@bramhambros.com. Bramham Bros is an authorized Armstrong dealer.
Product Videos
Custom Field
Brand Armstrong
Armstrong Part Number 974515-400
Part Type Hardware / Fitting
Fits Series 4380 1-1/2 x 1-1/2 x 6, 2 x 2 x 6, 3 x 3 x 6, 1-1/2 x 1-1/2 x 8, 2 x 2 x 8, 3 x 3 x 8
Fits Series 4360 1-1/2 D, 2 D, 3 D
Drawing Item 4360: item 36; 4380: item 36
Specification Impeller key (56C frame only); Shaft key (56C frame only)
Shipping cost: Inquire
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