Hexangular and even carry inside stainless steel tight settle bolt(even carry a machine rice)

Standard:GB77\DIN913\ISO4026

Specification:M1.6-M20, #2-1/2

Material:304\316, A2-70\A4-80

Surface processing:throw light

Usage scope:particularly provide fix spare part opposite kind of bolt used in position, carry one smooth, don't harm spare parts surface, much used for is carry small, usually regulate the situation of position.