Product Description
Armstrong Casing Capscrew (¾"-10NC × 2½") – Part No. 911131-220
Genuine Armstrong replacement casing capscrew, Armstrong part number 911131-220, for Series 4300 pumps. Shown as item 104 on the Series 4300 drawing (parts list 6043.132 / 6043.134 / 6043.136 / 6043.137) – highlighted in the pictures above.
Specification: ¾"-10NC × 2½"
Fits these Armstrong pumps
- Series 4300 (vertical in-line) – pump sizes 16 × 16 × 15L, 16 × 16 × 15H, 12 × 12 × 17
- Drawing item: 104
Other parts for this pump
Rebuilding a Series 4300 16 × 16 × 15L? These parts are often replaced at the same time:
| Item | Part | Armstrong part no. |
|---|---|---|
| 21 | Pump shaft | 427495-000 |
| 36 | Impeller key | 428164-724 |
| 40 | Motor bracket | 427325-011 |
| 40 | Motor bracket | 427345-015 |
| 50 | Stuffing box cover / adapter | 427498-011 |
| 50C | Stuffing box capscrew | 911125-212 |
| 51 | Seal chamber bushing | 427506-000 |
| 52 | Seal cover capscrew | 911125-416 |
| 53 | Seal cover capscrew washer | 427118-100 |
| 54 | Seal cover | 427510-002 |
| 58 | Male straight connector | 939001-114 |
| 59 | Tubing | 997531-004 |
| 62 | Outside mechanical seal | 975002-394 |
| 62 | Outside mechanical seal | 975000-954 |
| 62 | Outside mechanical seal | 975000-968 |
| 62 | Outside mechanical seal | 975000-953 |
| 62 | Outside mechanical seal | 975000-969 |
| 63 | Tee | 935101-001 |
| 64 | Bushing | 935123-050 |
| 67 | Nipple | 938103-001 |
| 68 | Air vent | 939018-101 |
| 80 | Impeller | 427492-041 |
| 88 | Impeller lock collar | 427509-071 |
| 89 | Lock collar capscrew | 911817-405 |
Showing 24 of 44 parts – see the full list in the parts finder.
Not sure this is the right part?
Use our Armstrong Pump Parts Finder: choose Series 4300, 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 911131-220
Part Type Hardware / Fitting
Fits Series 4300 16 x 16 x 15L, 16 x 16 x 15H, 12 x 12 x 17
Drawing Item 4300: item 104
Specification 3/4"-10NC x 2-1/2"
Shipping cost: Inquire
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