frontier ka24de headbolt/washer

[supasan]

I accidently threw away my headbolt washers and the new head bolts doesn't come with washers. So I bought a frontier/xterra ka24de head bolt washer set. I was thinking of just using the washer from the frontier and head bolt from a 240sx. It looks the same but the 240 head bolt doesn't sit as flush on the washer as the frontier head bolt. So will it fit/safe if I go the 240sx head bolt/frontier washer or froniter headbolt/washer. Idk where to get the washers for a 240sx the head bolts don't come with washers. Thanks.