Mining roofing rock bolt screw with square


Metric, flat washers, per. specification din 125, part 2, type a this table define the dimensional limits of metric washers sizes m1.6 to m28 which are medium type, primarily for hexagon bolts. this standard has been withdrawn and replaced by the following: din en iso 7089, din en iso 7090, iso 7089, iso 7090

Flange bolts used in automotive applications, plumbing, and more, flange bolts feature a washer like flange beneath the bolt head that speeds production time and distributes the clamping load, offering protection to the mating surface.

Astm f436 (104) astm f959 (45) din 125 (215) ... these general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.

Jan 31, 2009 · agreed. these should not be considered a "mod". its a significant improvement over the 50 year old screw on design for several reasons: ease of removal and reassembly, tighter neck body coupling and never ever having to worry about stripping wood screws. this should absolutely be standard on every "bolt" neck guitar.

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