{"id":265856,"date":"2024-10-19T17:44:17","date_gmt":"2024-10-19T17:44:17","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-25581954\/"},"modified":"2024-10-25T13:43:19","modified_gmt":"2024-10-25T13:43:19","slug":"bs-25581954","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-25581954\/","title":{"rendered":"BS 2558:1954"},"content":{"rendered":"<p>This British Standard relates to tubular box spanners suitable for the following hexagon standards or ranges:<\/p>\n<p>BS 1768, <i>Unified precision hexagon bolts, screws, nuts (UNC and UNF threads) and plain washers. Normal series.<\/i><\/p>\n<p>BS 1769, <i>Unified black hexagon bolts, screws, nuts (UNC and UNF) and plain washers. Heavy series.<\/i><\/p>\n<p>BS 1981, <i>Unified machine screws and machine screw nuts.<\/i><\/p>\n<p>BS 1083, <i>Precision hexagon bolts, screws, nuts (BSW and BSF threads) and plain washers.<\/i><\/p>\n<p>BS 916, <i>Black bolts and nuts. Hexagon and square, BSW and BSF.<\/i><\/p>\n<p>BS 57, <i>B.A. screws, bolts, nuts and plain washers.<\/i><\/p>\n<p>Whitworth large hexagons (originally specified in BS 190, now obsolete).<\/p>\n<p>Metric hexagons.<\/p>\n<blockquote>\n<p>NOTE The spanners specified are also suitable for all the bolt sizes given in BS A102<sup>1)<\/sup> and for all the bolt head and most of the nut sizes used by the petroleum industry and specified in BS 1750<sup>2)<\/sup>.<\/p>\n<\/blockquote>\n<p>The specification includes clauses for material, heat treatment, marking, tests and dimensional details together with requirements for the tommy bars by which the spanners are operated.<\/p>\n<p>Steels for spanners and tommy bars; hardness figures, performance test. Two grades of spanner. Dimensions: unified precision hexagons, normal series, in BS 1768; Unified black hexagons, heavy series, in BS 1769; Unified machine screw hexagons in BS 1981; precision hexagons B.S.W. and B.S.F. in BS 1083; black hexagons in BS 916; B.A. hexagons in BS 57; Whitworth large hexagons (originally in BS 190, now obsolete); metric hexagons.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Specification for tubular box spanners<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>1954<\/td>\n<td>32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":265863,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[424,2641],"product_tag":[],"class_list":{"0":"post-265856","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-25-140-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/265856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/265863"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=265856"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=265856"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=265856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}