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1972 Honda CB500K Stem Nuts & Bridge Washers

The stem and fork top bridge on a 1972 CB500K use different hardware positions. Compare the central chrome nut and washer with the original pieces, and treat the two top-bridge washers as another product. Matching chrome finish does not make the hardware interchangeable.

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Currently viewing Steering Hardware & Dampers

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Honda CB1000 CB900 CB750 CB550 chrome steering stem nut 90304-415-000

Honda CB Chrome Steering Stem Nut ~ Replaces 90304-415-000

$9.95 USD
49-0786
Replace your steering stem nut with this Chrome Steering Stem Nut, hex nut size 30mm, replacing OEM #90304-415-000.Sold each. We also offer the matching...
Honda CB750 CB550 CB500 CB450 CB400 fork cap o-ring (set 2) 94608-50000

Honda CB Fork Cap O-Ring (Set/2)

$2.95 USD
49-0790
Replace your fork cap O-rings with this Fork Cap O-Ring Set of 2, replacing OEM #94608-50000 (qty 2).Key Features• Fork cap O-rings• Set of...
Honda CB750 CB550 front fork top bridge triple tree washer kit 53235-300-000

Honda CB Front Fork Top Bridge / Triple Tree Washer Kit ~ Replaces 53235-300-000

$12.50 USD
73-0833
Avoid broken triple trees with this Front Fork Top Bridge / Triple Tree Washer Kit of 2 washers. These washers are needed in order...
Honda CB1000 CB900 CB750 CB550 steering stem washer 90503-283-000

Honda CB Steering Stem Washer ~ Replaces 90503-283-000

$3.50 USD
49-0787
Replace your steering stem washer with this Chrome Steering Stem Washer, replacing OEM #90503-283-000.Sold each, order the quantity you require.Key Features• Chrome steering stem...
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Honda CB750 CB550 black steering stem nut joker machine 90304-415-000

Honda CB Black Steering Stem Nut ~ Joker Machine ~ Replaces 90304-415-000

$47.95 USD
12-0073
Dress up your steering stem with this Joker Machine Black Steering Stem Nut, 30mm hex, replacing OEM #90304-415-000. High-quality CNC-machined and made in the...
Honda CB750 CB550 CB500 fork boot collars joker machine

Honda CB750 / CB550 / CB500 Fork Boot Collars ~ Joker Machine

$99.95 USD
12-0072
Get a café look while keeping your OEM fork gaiters with these Joker Machine Custom Fully CNC Machined Fork Boot Collars, set of 2....
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1972 Honda CB500K · Steering Hardware & Dampers Buying guide

Find the hardware position before selecting its reference

The individual central nut has a 30mm hex and a separate matching washer. The top-bridge kit supplies two washers with another reference; inspect the location being repaired before adding either product to the order.

Parts to consider

Honda CB Chrome Steering Stem Nut ~ Replaces 90304-415-000 30mm-hex chrome stem nutIndividually sold central stem nut referencing 90304-415-000. The 30mm figure describes the hex size; the matching stem washer is offered separately.View part Honda CB Front Fork Top Bridge / Triple Tree Washer Kit ~ Replaces 53235-300-000 Pair of top-bridge washersTwo washers referencing 53235-300-000 for the fork top bridge. These are distinct from the single central steering-stem washer.View part Honda CB Steering Stem Washer ~ Replaces 90503-283-000 Central steering-stem washerIndividual chrome washer referencing 90503-283-000. Select for the central stem position, separately from the nut and the two-piece top-bridge washer kit.View part

Pair the central hardware by its own references

The chrome stem nut references 90304-415-000 and is sold each. The chrome stem washer references 90503-283-000 and is another individually sold item. Check both original pieces before choosing replacements; the washer is not supplied simply because the matching nut appears alongside it in this guide.

Keep bridge hardware and fork accessories apart

The two-piece top-bridge washer kit references 53235-300-000. Fork-cap O-rings and boot collars have different positions and functions, even where their applications include the CB500K. Use the original bridge arrangement and the appropriate service information when identifying hardware; a washer set does not repair a damaged bridge or supply steering bearings.

Choosing the right parts

What does the chrome nut’s 30mm measurement tell me?

It specifies the wrench hex, while the replacement reference is 90304-415-000 for the listed 1972 CB500K. No thread size or pitch is provided; confirm those requirements separately if the steering stem has been changed.

Will the nut order include its matching washer?

No. The chrome nut is supplied individually, and the 90503-283-000 washer is a separate purchase. One washer is supplied for the central stem position; inspect the original before deciding whether the order needs it.

Why are there two different washer listings?

The 90503-283-000 washer is the individual central stem piece. The 53235-300-000 kit contains two upper fork-clamp washers that distribute clamping load. Their different references and mounting positions determine which product the repair requires.

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