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AN975-12

AN975 taper pin washer

AN975-12 cited reference fields
Head / formTaper pin washer
Diameter / thread / sizescrew size 3/4; A 49/64"
Grip / length / thicknessD 15/64", E 7/64" (see the sheet's figure for A to F)
Material / finishSteel, cadmium plate QQ-P-416 Type II Class 2
Reference confidencelow
SourceAN975 Rev 3 sheet 1 ↗

Head / form source: AN975 Rev 3 sheet 1

Source notes and limits

  • AN975 Rev 3 table: A 49/64, B 1-9/32, C 1?, D 15/64, E 7/64, F min dia 1-1/8.
  • Not legible on the scan: c ("?" marks the unreadable characters).
  • "USED WITH TAPER PINS SHOWN ON AN386." (AN975 sheet 1). MATERIAL: STEEL, SPECIFICATION MIL-S-7097, AN-S-11, OR QQ-S-698. DIMENSIONS IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES FRACTIONS ±1/64.
  • "AN975 REV 3 is inactive for new design and is no longer used except for replacement purposes." (Notice 1, 16 June 1997).
  • FAA AC 43.13-1B para 7-89 (p.7-15): "TAPER PIN WASHERS (AN975). Taper pin washers are used with the threaded taper pin."
  • FAA AC 43.13-1B para 7-101 (p.7-17): "The threaded taper pin is used with a taper-pin washer (AN975) and shear nut (safetied with a cotter pin) or self-locking nut (if undrilled)."
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Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers