Which pumps does this piston lock nut fit?

It fits the FMC Bean M1224, M1432 and M1632 reciprocating pumps.

What does a piston lock nut do?

It secures the piston on the rod and retains the threaded joint against loosening under the pump's reciprocating loads.

Which part number does this replace?

It is an aftermarket replacement for FMC Bean SKU 3269115. The brand and number are used for cross-reference only.

Piston Lock Nut 1"

Piston Lock Nut 1" — Piston aftermarket replacement part

This 1" Piston Lock Nut is a threaded fastener for the piston assembly of FMC Bean M-series reciprocating pumps. It secures and retains the piston on the rod, holding the threaded joint against loosening under the pump's reciprocating loads. It fits the FMC Bean M1224, M1432 and M1632 pumps and weighs about 0.48 lb. This is an aftermarket replacement part offered as a substitute for FMC Bean SKU 3269115; the brand and part number are listed for identification and cross-reference only and do not indicate OEM manufacture.

What it is

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.

Pump compatibility

M1224
M1432
M1632

Specifications

Property	Value
Weight	0.48 lb (≈ 0.22 kg, converted)
Width	1.62 in / 4.1 cm
Height	1.87 in / 4.8 cm
Depth	1.27 in / 3.2 cm

Manufacturer technical notes

Piston Lock Nut 1" (SKU 3269115), cold-forged from API 7K-certified ASTM A543/A543M Type B alloy steel, quenched+tempered (HRC 32-38) with Dacromet coating. Tensile strength ≥1100MPa, 720h salt spray corrosion-free, fits FMC Bean L1622 mud pumps, UNS thread standard.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing FMC Bean 3269115.

FAQ

Which pumps does this piston lock nut fit?: It fits the FMC Bean M1224, M1432 and M1632 reciprocating pumps.
What does a piston lock nut do?: It secures the piston on the rod and retains the threaded joint against loosening under the pump's reciprocating loads.
Which part number does this replace?: It is an aftermarket replacement for FMC Bean SKU 3269115. The brand and number are used for cross-reference only.

Related parts

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All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.

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