Gasket, Union Nipple

21621-31100

Superseded / ended 1984-08 PNC 21621 General

Fitment

Codes the factory prints against this line. Hover for the catalogue's own expansion.

5R 2000CC RU2#,30

Fits: Dyna RU2#,30,JU20,BU2#,3#,40,HU30,40,50,WU40
Valid: 1977-08 → 1984-08
Model period: not recorded — this catalogue predates the field
Destination †: 02
Catalogue page †: 0011/0150

† Read from the record layout but confirmed by no published legend.

Shown on

Figure MF2210A Figure MF2211B

Interchangeable numbers

Number	Alternative	Effective
21621-40020	21621-31100	1990-08
21621-44050	21621-31100	1979-10
21621-44051	21621-31100	1990-08

List price

Not priced in this market.

Only the Japanese dataset ships a price file. Add the part to an enquiry to ask a seller for a quote.

This number everywhere

Every vehicle in every market that takes 21621-31100.

Show all applications

No quantity, deliberately

The factory catalogue records which parts a vehicle takes, never how many. Quantity was always typed in by the parts counter when raising an order, so nothing here can tell you whether you need one or four.