How to use union all with manual value (not from another tabel)?

Try this:

SELECT csatuan2,csatuan1,nkonversi FROM ms_metriks 
UNION ALL SELECT 'LTR','PCS','1'
UNION ALL SELECT 'PCS','LTR','1'

Here is one way you can do it:

SELECT 'LTR' as csatuan1,'PCS' as csatuan2,'1' as nkonversi
UNION
SELECT 'PCS','LTR','1';