Quick view Add to Cart Inspection of 24SRT Structural Tubing in RB-17B, C, D, and E [april4b17phar3] Document Part Number: T.O. No. 01-20E-56 Number of pages: 8Part Number: T.O. No. 01-20E-56Revision Date: 9-July-1943 MSRP: Was: Now: $15.00