Blackmer 903523 Locknut LP Gas Propane Pump OEM Shaft Retainer

SKU: 903523

Weight	1 lbs
Dimensions	15 × 10 × 2 in

$69.08

In stock — available to order.

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Same-item volume pricing

Quantity	Unit price	Saving
1–4	$69.08	0%
5–9	$65.63	5%
10+	$62.17	10%

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Blackmer 903523 Locknut LP Gas Propane Pump OEM Shaft Retainer

Specifications & product details

REGIONS SUPPLY BUYING GUIDE

Product details & buying advice

For pump or compressor service parts, the equipment model and revision are the starting point for a reliable match.

Product type	Pump and compressor service parts
Part / SKU	903523

What to check before ordering

Compare the complete host-equipment identification with the applicable parts drawing.
Check the material and seal configuration, and whether the listing supplies one part, a kit or a rotating assembly.
Use the matching service instructions for clearances, seal work and reassembly checks.

Service reminder: A shared diagram or family name does not establish fit across every model. Confirm the individual part reference for your equipment.

Have gas-system installation and service completed by qualified personnel. Use the current instructions for the exact model and the requirements that apply at the installation location.

Product help & manufacturer resources

Blackmer installation, operation and maintenance manuals

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Overview

Blackmer 903523 Locknut – OEM LP Gas Propane Pump Shaft Retainer

The Blackmer 903523 Locknut is a genuine OEM threaded retaining nut designed for use in Blackmer LP gas and propane pump assemblies. This locknut is used to securely fasten internal shaft-mounted components, helping maintain proper alignment and safe pump operation.

Commonly replaced during pump maintenance, rebuilds, or shaft service, this hardened steel locknut is manufactured to Blackmer specifications for strength, thread accuracy, and long service life in demanding propane service environments.

Key Features & Benefits:

Genuine Blackmer OEM locknut
Designed for LP gas & propane pump applications
Hardened steel construction for durability
Precision-machined threads for secure fit
Ideal for pump rebuilds and preventative maintenance
Helps prevent loosening in high-vibration conditions

Compatible with select Blackmer propane pump models.
(Verify application before purchase.)

Features

Genuine Blackmer OEM replacement part
Manufacturer Part Number: 903523
Precision-machined threaded locknut
Designed for shaft retention and secure assembly
Heavy-duty industrial construction
Excellent wear and corrosion resistance
Maintains proper bearing and shaft alignment
OEM fit and factory-quality performance
Durable construction for long service life
Ideal for preventative maintenance and pump rebuilds
Easy replacement for worn or damaged locknuts
Manufactured to Blackmer’s exact specifications

Applications

Blackmer positive displacement pumps
LP Gas (Liquefied Petroleum Gas) systems
Propane transfer equipment
LPG delivery trucks
Bulk plant transfer pumps
Anhydrous ammonia systems
Industrial liquid transfer equipment
Petroleum and fuel handling equipment
Pump repair and maintenance
Industrial gas service applications

Benefits

Ensures secure shaft retention during pump operation.
Helps maintain proper alignment of internal pump components.
Reduces vibration and component wear.
OEM-quality construction for dependable performance.
Built for demanding industrial and commercial environments.
Provides long-lasting durability and reliable operation.
Perfect for scheduled maintenance or complete pump rebuilds.

Product details

Part / SKU	903523

Package includes

Blackmer 903523 Locknut LP Gas Propane Pump OEM Shaft Retainer

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

Shipping & availability

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