Quick view Add to Cart Installation of Self-Locking Nuts on Rocker Box Cover Studs - R-670-3 and R-670-5 Engines Document Part Number: T.O. No. 02-40AA-7 Number of pages: 2Part Number: T.O. No. 02-40AA-7Revision Date: 22-Jan-1943 MSRP: Was: Now: $15.00