Product Description
Armstrong Adapter – Part No. 426742-031
Genuine Armstrong replacement adapter, Armstrong part number 426742-031, for Series 4380, 4280, 4030 pumps. Shown as item 40 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
- Ductile iron construction uses the −031 / −035 suffix per Armstrong’s note – confirm with your pump serial number.
Specification: Ductile iron; Combination stuffing box & adapter (items 40 & 50) – suffix per Armstrong’s construction note; Combination stuffing box & adapter (items 40 & 50), ductile iron construction
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 4 × 4 × 11½, 5 × 5 × 11½, 6 × 6 × 11½, 8 × 8 × 11½
- Designation: 'M'
- Motor frames: 254JM, 256JM
- Pressure rating: 250#
- Drawing item: 40
- Series 4280 (close coupled end suction) – pump sizes 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½, 8 × 6 × 11½
- Designation: 'M'
- Motor frames: 254JM, 256JM
- Construction: Ductile iron (250#)
- Drawing item: 40
- Series 4030 (base mounted end suction) – pump sizes 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½, 8 × 6 × 11½
- Designation: 'M'
- Motor frames: 284T, 286T, 254T, 256T, 324T, 326T, 364T, 365T
- Construction: Ductile iron (250#)
- Drawing item: 40
Other parts for this pump
Rebuilding a Series 4380 4 × 4 × 11½? These parts are often replaced at the same time:
Showing 24 of 30 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.
