Set of (16) 3/8" X 24 fine thread Rocker Arm nuts compatible with many Small Block Chevy's. 
These are:

  • Thread Size: 3/8" x 24 Fine Thread
  • Wrench Size: 5/8"
  • Country Made In: Canada
    • 262 CID (4.3L) 1975-1976
    • 265 CID (4.3L) 1955-1957
    • 265 CID (4.3L) 1994-1996 VIN: W
    • 267 CID (4.4L) 1979-1982
    • 283 CID (4.6L) 1957-1967
    • 302 CID (5.0L) 1967-1969
    • 305 CID (5.0L) 1976-2002
    • 307 CID (5.0L) 1968-1973
    • 327 CID (5.4L) 1962-1969
    • 350 CID (5.7L) 1967-1996 Including LT1
    • 350 CID (5.7L) 1996-2002 VIN: R Vortec
    • 400 CID (6.6L) 1970-1980