What kind of fittings are used on the 41 chevy oil pressure lines. Can these be purchased, I've never seen any like these. Dave

1941 Chevy
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1941 GMC resting peacefully
1946/1947 Chevy Street rod on s10 frame complete
1945 GMC panel truck in line for restoration
1941 Plymouth stock complete
1941 GMC COE in restoration process
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1941 Chevy Coe uncertain future resting now