BS 3692-2001 Speccification for Bolt and Nut

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Transcript of BS 3692-2001 Speccification for Bolt and Nut

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2/3 H minI

Depth ofbasic threadH

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Completely and partiallydecarburized zone

Non - decarburized zone

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Countersink dasee clause 10.2.2

120 ± 10 chamfer

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Small end of thread = nom.effect dia. of nut minus0.02 mm approx. on 3 mmdia. up to 0.12 mm approxon 39 mm dia.

Large end of thread = coursefit max. effect dia. of nut plus0.035 mm approx. on 3 mm dia.up to 0.12 mm approx. on 39 mm dia.

Dia. of gauging surfaceequal to the minimumacross distance flats of nut

Thread tapered atan included angleof approx. 0.5º

Nut to begauged

Feeler gauge equalto squareness tolerance(max.)

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Hardened and tempered test plate

D = d with limits to Class D11 (BS 1916)

Hardened and tempered mandrel

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