Pentair 354265 hex head washer, 5/16-18 by 3/4 inchPentair 5/16-18 x 3/4" Hex Head Washer, 354265$899
Pentair 354265 hex head washer, 5/16-18 by 3/4 inch
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Pentair 5/16-18 x 3/4" Hex Head Washer, 354265

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$899
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Quick overview

  • 5/16-18 thread Coarse thread in the standard 5/16 inch size.
  • 3/4 inch length The length called out on the Pentair parts list as 354265.
  • Genuine Pentair Factory hardware rather than a hardware store substitute.
  • Used across several models Listed with Challenger hi head and high flow pumps, PacFab HydroPump 590 and 700 series, and Sand Dollar top mount sand filters.
  • Buy the right count Most assemblies use several of these, so check how many your equipment needs before ordering one.
  • Replace corroded hardware Pool pad fasteners rust and round off, and a seized head is far more trouble than a new screw.
Full description and specifications ↓

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Product details

The Pentair 354265 is a hex head washer in 5/16-18 by 3/4 inch. It is the genuine Pentair fastener, listed in the parts breakdowns for Challenger hi head and high flow pumps, the PacFab HydroPump 590 and 700 series, and Sand Dollar top mount sand filters.

Small part, real job

Hardware like this holds housings, brackets and covers in place under vibration and thermal cycling. The washer face spreads the clamping load so the plastic underneath is not crushed, and the hex head lets a socket get proper torque on it. Substituting the wrong length or the wrong head shape often means the part sits proud, does not clamp evenly, or bottoms out before it grips.

Ordering

This is one fastener. Most of the assemblies it appears in use several, so check the count on your equipment before you order, and take the opportunity to replace any of the surrounding hardware that has corroded.

Specifications
Brand Pentair
Manufacturer part number 354265
UPC 788379699772
Type Hex head washer
Thread 5/16-18
Length 3/4"
Listed with Pentair Challenger hi head and high flow pump models, PacFab HydroPump 590 and 700 series, Sand Dollar top mount sand filters
Shipping weight 0.05 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What size is it?
5/16-18 thread, 3/4 inch long, with a hex head and integral washer.
Which equipment uses it?
Pentair lists it with the Challenger hi head and high flow pump models, the PacFab HydroPump 590 and 700 series, and Sand Dollar top mount sand filters.
How many come in the listing?
This is the single Pentair part 354265. Assemblies usually call for several, so count what you need first.
Can I use a hardware store bolt instead?
You can find the thread anywhere, but pool pad hardware sits in wet, chlorinated air year round. The factory part is specified for that, and mixing in ordinary steel is how you end up cutting off a seized head later.
Ask your own question