Does this go over the flared portion of the line that goes into the pump or over the threads against the nut that tightens into the pump?

Not sure if I fully understand your question, but this washer goes on all the way past the threads and against the nut (which could be going into your pump, hydroboost, gearbox etc). For my line, it was a pain as the washer was a little too small for my application (05 f350 with the 6.0).

What size are these. What’s the Inside diameter?

One is .455" ID The other is .525" ID

How many come in a set? Is it just two?

Yes, there are two nylon washers in the package, though you only need one if you are replacing the pump.

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Dorman 82540 Power Steering Caps - Power Steering Sealing Washer Assortment Compatible with Select Models, 2 Piece

Product ID: 3433258

🔧Easy direct replacement

⚙️Exact OEM fit & function

🛡️Durable, long-lasting materials

S$10

Duties & taxes included

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Description

🛠️ Upgrade your ride with confidence—never settle for less!

BUILT TO LAST - Crafted from premium materials for extended durability
TRUSTED EXPERTISE - Backed by 100+ years of automotive innovation
PRECISION OEM MATCH - Seamlessly fits your vehicle like the original part
PERFECT FIT GUARANTEE - Use our garage tool to ensure exact compatibility
HASSLE FREE INSTALLATION - Direct replacement saves time and effort

The Dorman 82540 Power Steering Caps are a 2-piece washer set engineered to match the exact fit and function of original factory parts for select vehicle models. Made from high-quality materials, these caps ensure reliable sealing and long service life, backed by over a century of automotive expertise. Designed for easy direct replacement, they help maintain optimal power steering performance and prevent leaks.

Specifications

ASIN	B000COCXO0
Best Sellers Rank	#78,009 in Automotive ( See Top 100 in Automotive ) #7 in Automotive Replacement Power Steering Pump Caps #118 in Automotive Replacement Power Steering Equipment
Brand	Dorman
Customer Reviews	4.4 4.4 out of 5 stars (399)
Date First Available	November 23, 2005
Exterior	Ready To Paint If Needed
Item Weight	0.16 ounces
Item model number	82540
Manufacturer	Dorman Products
Manufacturer Part Number	82540
Model	82540
OEM Part Number	388897S; 388898S
Product Dimensions	5.5 x 1.75 x 0.5 inches

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