AN970-6

Source notes and limits

• Printed on the scan as A "390", D "1 625", T "063"; decimal points restored.
• "SUPERSEDED PART" column prints "-6" (the first row prints "MS63040-3"); the sheet "SUPERSEDES MS63040 (ORD)".
• AN970 Rev 6 note 3: "NOT INTENDED FOR AIRCRAFT USE". FAA AC 43.13-1B para 7-86 nevertheless names AN970 for wooden aircraft structures; see FINDINGS.
• AN970 REV. 6, dated 4 APRIL 1998, is hereby canceled and superseded by NASM970. The Part Identification Numbers (PIN) for AN970 REV. 6 and the part numbers for NASM970 are identical. The part numbers have not been changed. (Notice 4, 28 July 1999).
• Material "MATERIAL STEEL"; "FINISH CADMIUM PLATE, QQ-P-416, TYPE II, CLASS 2".
• Example (sheet 1): "EXAMPLE OF PART NUMBER AN970 -4 = 1/4 BOLT SIZE, 265 ID AND 063 THICK".
• FAA AC 43.13-1B para 7-86 (p.7-15): "PLAIN WASHERS (AN960 AND AN970). Plain washers are widely used with hex nuts to provide a smooth bearing surface, act as a shim to obtain the proper grip length, and to position castellated nuts in relation to drilled cotter pin holes in bolts. Use plain washers under lock washers to prevent damage to bearing surfaces. Cadmium-plated steel washers are recommended for use under boltheads and nuts used on aluminum alloy or magnesium structures to prevent corrosion. The AN970 steel washer provides a larger bearing surface than the plain type, and is often used in wooden structures under boltheads and nuts to prevent local crushing of the surface."