Our original set of PQR Nuts consists of 5 standard metric sizes M16, M20, M24, M30 & M36, for surveying of bolts most often used on construction sites.
(For more information click here)This NEW comprehensive set consists of 12 pieces with standard nut thread sizes M16, M20, M22, M24, M27, M30, M33, M36, M42, M48, M56, and 5/8" PQR Nut to use on survey pillars for measurements with mini prisms.
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