Piston
Lock Nut Piston Extension Rod 1"-8 Nylon
- Catalogue reference number
- KA-270
- Catalogue brand
- Kerr
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.
Catalogue model references
These are retained catalogue associations, not confirmed fitment for your equipment. Choose the model you want to review.
Catalogue specification records
| Original field | Recorded value |
|---|---|
| Weight | 0.50 lb (≈ 0.23 kg, converted) |
| Width | （无） |
| Height | （无） |
| Depth | （无） |
Catalogue description records
This Lock Nut is a 1"-8 nylon-insert lock nut used on the piston extension rod of reciprocating pumps, where it secures and retains the threaded rod connection against loosening under the pump's reciprocating loads. It fits a range of Kerr horizontal directional drilling (HDD) mud pumps, including the KA-3500PT, KT-3350PT, KT-3400PT, JT7020, T-35, T50 and T50-PT. It weighs about 0.5 lb and is supplied as an aftermarket replacement part, cross-referenced to Kerr SKU KA-270 for identification.
A pump piston transmits force from the power end to the pumped fluid inside the cylinder liner. It carries the sealing element and reciprocates within the liner bore on every stroke.
Catalogue question records
Original catalogue questions are retained. Fitment and availability need technical review.
- Which pump models does this lock nut fit?
- It fits the Kerr JT7020, KA-3500PT, KT-3350PT, KT-3400PT, T-35, T50 and T50-PT models.
- What does the "1"-8 nylon" in the name mean?
- It describes the thread and locking feature: a 1-inch nominal diameter with 8 threads per inch (1"-8), and a nylon insert that resists loosening under vibration.
- What part number is this cross-referenced to?
- It is an aftermarket replacement cross-referenced to Kerr SKU KA-270; the brand and part number are used only for identification and do not indicate OEM manufacture.
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