10: the screw indicates that the major diameter of the thread (i.e. the top of the thread) is 10mm, and the nut indicates the diameter of the thread groove.

17 means that the distance between the opposite sides of the screw (or nut) is 17 mm, that is, when the opening of the wrench is 17mm, the hexagon of the screw (female) can be clamped.

Extended data:

Bolt size specification table

1, hexagon-head bolt

This standard stipulates that the thread specification of hexagon-head bolts is M 1.6~M64, the performance grades are 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3 and AL4, and the product grades are A and B. ..

Grade a is used for d= 1.6~24mm and l≤ 10d or l≤ 150mm (whichever is smaller); Grade b is used for bolts with D > 24 mm or L > 10d or L > 150mm, whichever is smaller.

If other technical requirements are needed, they shall be determined from the current standards (GB/T 196, GB/T3 106, GB/T3098. 1, GB/T3098.6 and GB/T3103./KLOC-0.

2. Full thread of hexagon-head bolt

This standard stipulates that the thread specifications of hexagon-head bolts are MI.6~M64, the performance grades are 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3 and AL4, and the product grades are A and B. ..

Grade a is used for d= 1.6~24mm and l≤ 10d or l≤ 150mm (whichever is smaller); Grade b is used for bolts with D > 24 mm or L > 10d or L > 150mm, whichever is smaller.

Note: this product is the same as GB/T5782, except that it is made of full thread, and the nominal length as the length specification of goods can reach 200 mm ..

If other technical requirements are needed, they shall be determined from the current standards (GB/T 196, GB/T3 106, GB/T3098. 1, GB/T3098.6 and GB/T3103./KLOC-0.

References:

Baidu encyclopedia entry-screw specification table