Product Description
Armstrong Motor Capscrew – Part No. 911129-110
Genuine Armstrong replacement motor capscrew, Armstrong part number 911129-110, for Series 4380, 4280, 4280-50 pumps. Shown as item 44 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
Specification: ⅝"-11NC × 1¼"; ⅝"-11NC × 1¼" long
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 2 × 2 × 8, 3 × 3 × 8, 4 × 4 × 8, 5 × 5 × 8, 1½ × 1½ × 10, 2 × 2 × 10, 3 × 3 × 10, 4 × 4 × 10, 6 × 6 × 10, 8 × 8 × 10, 4 × 4 × 11½, 5 × 5 × 11½, 6 × 6 × 11½, 8 × 8 × 11½
- Designation: 'M'
- Motor frames: 284JM, 286JM, 324JM, 326JM, 284JP, 286JP, 324JP, 326JP
- Drawing item: 44
- Series 4280 (close coupled end suction) – pump sizes 3 × 1½ × 8, 3 × 2 × 8, 3 × 2½ × 8, 4 × 3 × 8, 5 × 4 × 8, 6 × 4 × 8W, 2 × 1 × 10, 2 × 1½ × 10, 3 × 1½ × 10, 3 × 2 × 10, 3 × 2½ × 10, 5 × 4 × 10, 6 × 4 × 10, 6 × 5 × 10, 8 × 6 × 10, 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½, 8 × 6 × 11½
- Designation: 'M'
- Motor frames: 284JM, 286JM, 324JM, 326JM, 284JP, 286JP, 324JP, 326JP
- Drawing item: 44
- Series 4280-50 (pool & spa (NSF-50)) – pump sizes 3 × 1½ × 8, 3 × 2 × 8, 3 × 2½ × 8, 4 × 3 × 8, 5 × 4 × 8, 6 × 4 × 8, 2 × 1 × 10, 2 × 1½ × 10, 3 × 1½ × 10, 3 × 2 × 10, 3 × 2½ × 10, 4 × 3 × 10, 5 × 4 × 10, 6 × 4 × 10, 6 × 5 × 10, 8 × 6 × 10
- Designation: 'M'
- Motor frames: 284JM, 286JM, 324JM, 326JM, 284JP, 286JP, 324JP, 326JP
- Drawing item: 44
Other parts for this pump
Rebuilding a Series 4380 2 × 2 × 8? 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.
Product Videos
Custom Field
Brand Armstrong
Armstrong Part Number 911129-110
Part Type Hardware / Fitting
Fits Series 4380 2 x 2 x 8, 3 x 3 x 8, 4 x 4 x 8, 5 x 5 x 8, 1-1/2 x 1-1/2 x 10, 2 x 2 x 10, 3 x 3 x 10, 4 x 4 x 10, 6 x 6 x 10, 8 x 8 x 10, 4 x 4 x 11-1/2, 5 x 5 x 11-1/2, 6 x 6 x 11-1/2, 8 x 8 x 11-1/2
Fits Series 4280 (1) 3 x 1-1/2 x 8, 3 x 2 x 8, 3 x 2-1/2 x 8, 4 x 3 x 8, 5 x 4 x 8, 6 x 4 x 8W, 2 x 1 x 10, 2 x 1-1/2 x 10, 3 x 1-1/2 x 10, 3 x 2 x 10, 3 x 2-1/2 x 10, 5 x 4 x 10, 6 x 4 x 10, 6 x 5 x 10, 8 x 6 x 10, 4 x 3 x 11-1/2, 5 x 4 x 11-1/2
Fits Series 4280 (2) 6 x 5 x 11-1/2, 8 x 6 x 11-1/2
Fits Series 4280-50 3 x 1-1/2 x 8, 3 x 2 x 8, 3 x 2-1/2 x 8, 4 x 3 x 8, 5 x 4 x 8, 6 x 4 x 8, 2 x 1 x 10, 2 x 1-1/2 x 10, 3 x 1-1/2 x 10, 3 x 2 x 10, 3 x 2-1/2 x 10, 4 x 3 x 10, 5 x 4 x 10, 6 x 4 x 10, 6 x 5 x 10, 8 x 6 x 10
Drawing Item 4280: item 44; 4380: item 44; 4280-50: item 44
Specification 5/8"-11NC x 1-1/4"; 5/8"-11NC x 1-1/4" long
Shipping cost: Inquire
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