Fastener Standards
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BS 4168-7Specification for hexagon socket shoulder screws and wrench keys - metric series.
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BS 4168-8Specification for hexagon socket countersunk head screws and wrench keys - metric series.
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BS 4168-9Specification for hexagon socket screws and wrench keys - metric series.
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BS 4174Specification for self-tapping screws and metallic drive screws.
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BS 4183Specification for machine screws and machine screw nuts. Metric series.
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BS 4190Specification for black hexagon bolts, screws and nuts.
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BS 4235Specification for metric keys and keyways. Woodruff keys and keyways.
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BS 4320Specification for metal washers for general engineering purposes - metric series.
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BS 4439Specification for screwed studs for general purposes - metric series.
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BS 4464Specification for spring washers for general engineering and automobile purposes - metric series.
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BS 4882Specification for bolting for flanges and pressure containing purposes.
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BS 4933Specification for metric black cup and countersunk head bolts and screws with hexagon nuts.
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BS 6487Specification for split pin holes and wire holes in bolts, screws and studs.
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BS 7419Specification for square head holding down bolts.
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ASME B16.5Dimensions and tolerances for studs, hex bolts for class 150/300/400/600/900/1500/2500 flanges from 1/2 to 24 inch size.
