مجموعة قطع غيار تتكون من محمل واحد أو أكثر أو مجموعات محامل، تُصدر كوحدة واحدة للإصلاح/الاستبدال. قد تشمل حشوات، حلقات مطاطية، حلقات، سدادات، فاصل، غسالة، أو ما شابه.
juneau airport wind system (jaws) end item identification, bearing kit part name assigned by controlling agency, "spares kit for taylor scientific ws-3 and wd-3 wind insturments, consisting of 2 ea national precision bearing co p/n ssr2280zzr spec no. a7p25lg49, 1 ea bit snap ring, 1 ea little snap ring, 1 ea o-ring for body, 1 ea o-ring for shaft, 1 ea lamp bulb for control panel, 1 ea body screw and 1 ea lock washer, 1 ea 1/2" set screw for body mounting, 1 ea 3/8" set screw for adpater, 2 ea screws for control panel, 2 ea screws and 2 ea lock washers for pulser board, 2 ea screws and 2 ea lock washers for dc tach or pot assy" special features