| 4KF-0618* | R12 Tail x Komatsu (JIS) FS - 3/8 x 18mm |
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| 4KF-0622* | R12 Tail x Komatsu (JIS) FS - 3/8 x 22mm |
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| 4KF-0822 | R12 Tail x Komatsu (JIS) FS - 1/2 x 22mm |
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| 4KF-0824 | R12 Tail x Komatsu (JIS) FS - 1/2 x 24mm |
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| 4KF-1024* | R12 Tail x Komatsu (JIS) FS - 5/8 x 24mm |
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| 4KF-1224 | R12 Tail x Komatsu (JIS) FS - 3/4 x 24mm |
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| 4KF-1230 | R12 Tail x Komatsu (JIS) FS - 3/4 x 30mm |
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| 4KF-1633 | R12 Tail x Komatsu (JIS) FS - 1 x 33mm |
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| 4KF-1636* | R12 Tail x Komatsu (JIS) FS - 1 x 36mm |
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| 4KF-2036* | R12 Tail x Komatsu (JIS) FS - 1-1/4 x 36mm |
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| 4KF-2042* | R12 Tail x Komatsu (JIS) FS - 1-1/4 x 42mm |
