# Question: A blanking disk is 20 mm thick and is to be fastened

A blanking disk is 20 mm thick and is to be fastened to a spool whose flange is 25 mm thick, using eight M12 ?40 hex-head metric cap screws.

(a) What is the length of the threads LT for this fastener?

(b) What is the effective grip length l′?

(c) Is the length of this fastener sufficient? If not, round to the next preferred length.

(d) Find the shank length ld and the useful threaded length in the grip lt. These lengths are needed in order to estimate the fastener spring rate kb.

(a) What is the length of the threads LT for this fastener?

(b) What is the effective grip length l′?

(c) Is the length of this fastener sufficient? If not, round to the next preferred length.

(d) Find the shank length ld and the useful threaded length in the grip lt. These lengths are needed in order to estimate the fastener spring rate kb.

## Relevant Questions

A ¾ in-16 UNF series SAE grade 5 bolt has a ¾ -in ID tube 13 in long, clamped between washer faces of bolt and nut by turning the nut snug and adding one-third of a turn. The tube OD is the washer-face diameter dw = 1.5d = ...The figure illustrates the connection of a cylinder head to a pressure vessel using 10 bolts and a confined-gasket seal. The effective sealing diameter is 150 mm. Other dimensions are: A = 100, B = 200, C = 300, D = 20, and ...Bolts distributed about a bolt circle are often called upon to resist an external bending moment as shown in the figure. The external moment is 12 kip? In and the bolt circle has a diameter of 8 in. The neutral axis for ...Using the Gerber fatigue criterion and a fatigue-design factor of 2, determine the external repeated load P that a 1 ¼ -in SAE grade 5 coarse-thread bolt can take compared with that for a fine-thread bolt. The joint ...The bearing of Prob. 8–29 is bolted to a vertical surface and supports a horizontal shaft. The bolts used have coarse threads and are M20 ISO 5.8. The joint constant is C = 0.30, and the dimensions are A = 20 mm, B = 50 ...Post your question