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

Pentair 5/16-18 x 3/4" Hex Head Washer, 354265

Ask a questionMPN 354265
$899
Out of stock

30 day returns · Easy, with prepaid labels provided

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 ↓

Need a hand?

Bilingual support from pool professionals.

Send us a message

A pool professional will get back to you, usually the same business day.

About Pentair 5/16-18 x 3/4" Hex Head Washer, 354265, SKU PAC-101-3083. We will include it with your message.

We use your details to answer this message and nothing else.

Frequently bought together

Current item Pentair 5/16-18 x 3/4" Hex Head Washer, 354265
Pentair

5/16-18 x 3/4" Hex Head Washer, 354265

$899
Pentair Lid O-Ring, 5-3/4" ID, 350013Z
Pentair

Lid O-Ring, 5-3/4" ID, 350013Z

$599
Pentair Genuine OEM O-Ring, Square 8.5 in. Closure, 152509
Pentair

Genuine OEM O-Ring, Square 8.5 in. Closure, 152509

$1299
Pentair Challenger Front Housing, Slip Suction, Black, 355468Z
Pentair

Challenger Front Housing, Slip Suction, Black, 355468Z

$13999
Pentair Challenger Pump Strainer Pot, 355300
Pentair

Challenger Pump Strainer Pot, 355300

$13999
Pentair Challenger Front Housing O-Ring, 355329Z
Pentair

Challenger Front Housing O-Ring, 355329Z

$2299
Pentair Genuine OEM High Flow Diffuser O-Ring, 355030
Pentair

Genuine OEM High Flow Diffuser O-Ring, 355030

$1799
Subtotal

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

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

Customer reviews

More from Pentair

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