1/4"-20 X 0.375" Pan Head Phillips Grade 5 Zn Blue Plated UNC 12300 1/4"-20 X 0.5" Pan Head Phillips Grade 5 Zn Blue Plated UNC 3100 1/4"-20 X 0.375" Pan Head With Lock Washer Grade 5 Zn Blue Plated UNC 8600 1/4"-20 Flanged Nyloc Nut Grade 5 Zn Blue Plated UNC 10000