1998 Tacoma Aisin Manual Hubs.  These hubs are significantly stronger than the Warn hubs included with the Off Road Solutions manual hub kit.  With my recent step up to 315/75/16 tires I decided to make the IFS front end as strong as possible. 

Tacoma Factory Service Manual pages pertaining to the Aisin Hubs.  Detailed are all the small nuts, bolts, washers, gaskets and cone washers needed.

Page: SA-31
Page: SA-32
Page: SA-33
Page: SA-34

Some common Toyota part number for the hardware for these hubs:

Gasket Free Wheel: 43531-60010
Gasket Front Axle: 43422-60060
Cone Washer: 42323-60010
Hub Body Nut: 90170-08036
Hub Body Washer: 90201-08042
Cover Bolt with Washer: 90119-06024

The Hub Body with guts and Hub Cover with spring should be purchased from a Junk Yard. These two items alone are well over $400 from the dealer.  I paid $100 for 2 bodies and covers with 2/3 of the needed hardware.  I would expect to replace the gaskets and some of the hardware pices.