For a 1⁄ 4- 20 nut of thread class 2b at minimum major diameter and a bolt of thread class 2a at maximum major diameter, the gap between threads is 0. 8 medium carbon steel, quenched and tempered all sizes belowclass 10. 3m metric heavy hex screws b18. the result es/ el is in microns. the first specification approved by the council, called the specification for assembly of structural joints using high tensile steel bolts, was published in january 1951. for bolts and screws longer than 6 in. some of the more popular styles are illustrated above. styles of head heavy heads and nuts bolt bolt specification pdf users may require a bolt head or nut of greater width to compensate for wide clearance in bolt. us bolts head marking class and material nominal size range ( mm) mechanical properties proof load ( mpa) min.
00 primary metals identi■cation tagapplica- tion standard 3. full thread din- 933 metal zinc- plated blister and window box next page code size € / 100 dm4 x 8 4,. the approximate allowance can be calculated according to the below formulas: el h = es h = 0. p is the pitch expressed in microns. the allowance el for internal threads and es for external threads is derived from the class. figure 1 — hilti carbon steel kwik bolt tz2 ( kb- tz2) figure 2 — hilti kb- tz2 installed figure 3 — bolt head with length identification code and kb- tz2 head notch embossment table 1a - setting information setting information symbol units nominal anchor diameter ( in) 1/ 4 3/ 8 1/ 2 5/ 8 3/ 4 nominal bit diameter d o in. 000 dm4 x 25 7, 267 7. diameter ( table 5. 2 asme standards: 5 b18. 1 square and hex bolts and screws b18. grade 2 requirements for sizes 1/ 4 through 3/ 4 in apply only to bolts and screws 6 in. • washers conform to the requirements of astm f844. bs 7345: 1990 ( iso r 888), nominal lengths for bolts, screws and studs — thread lengths for general purpose bolts. since that bolt specification pdf time the council has published seventeen successive editions. specifications: astm a563: carbon and alloy steel nuts astm a194/ a194m: carbon and alloy steel nuts for bolts for high■ pressure and high■ temperature service. tensile strength ( mpa) class 8. nuts and bolts tensile strength n/ mm2 tensile psi dia range nut load n/ mm2 austenitic 70 a2 and a. 3 hexagon socket and spline socket screws b18. the following sizes of metric din 931 hexagon head cap screws/ bolts are available for immediate shipping from stock: diameters ranging from m5 to m52 in a2 and marine grade a4 stainless steel as well as aluminum, brass nylon and steel. this type is measured from first thread to first thread. nuts to be paired with pdf same grade of stainless steel screws steel group. • nuts conform to the requirements of astm a563, grade a, hex. bolts have various styles of heads. 000 < = m20 800 the pdf tensile stress is calculated with reference to the tensile stress area ( see pdf din en iso. this difference is called the allowance4. in this specification, the term lot shall be taken as that given in the astm standard as follows: product astm standard see lot definition in section bolts a325 9. 1m metric socket head cap screws 2. 2 this consolidated standard is to ensure alignment between standards with the same intended end use and to simplify the use and maintenance bolt specification pdf of structural bolt specifica- tions. and shorter in lengths. bs 7371- 6: 1998, coatings on metal fasteners — part 6: specification for hot dipped galvanized coatings. 1m metric hex cap screws b18. 1 bolts, screws, studs 1/ 4 thru 1- 1/ 2 33, 000 60, 000 36, 000 60, 000 – b70 b100. 9 alloy steel, quenched and temperedclass 12. of bolts, screws and studs yield strength ( stress) min, psi machine test specimens of bolts, screws, and studs tensile strength ( stress) min, psi surface hardness rockwell 30n max core hardness rockwell min core hardness rockwell max grade
identi■- cation marking. this is the space between nut and bolt derived from subtracting diameters. el g = es g ≈ * p. 1 this specification is a consolidation and replacement of six astm standards, including; a325, a325m, a490, a490m, f1852 and f2280. in diameter and greater ( table 3. ments for application to carbon and alloy steel bolts, screws, washers, nuts, and special threaded fasteners 2. 2 twist- off- type tension control bolt assemblies f1852 13. bolts, screws, washers, nuts, and special threaded fasteners 2.
307a 307b a325 a449 bc bd a490 h - k g 9 for additional technical information, contact fastenal engineering at com. yield strength ( mpa) min. revised values for pre- installation verification testing and for pretension for group 120 bolts larger than 1 in. grade 1 requirements shall apply. material specifications carbon steel with electroplated zinc • hilti kb1 anchor bodies manufactured from carbon steel with fe/ zn plating per astm f1941 to a minimum thickness of 5 µm. 1 minimum bolt pretension moved to table 5. each was developed through the deliberations and approval of the full council membership and. 1/ 4 3/ 8 1/ 2 5/ 8 3/ 4. increased standard bolt hole diameter and slot widths for bolts 1- in. 3 aiag standard: 6 aiag b- 5 02. 3 aiag standard: 6. nuts and bolts din- 933 hexagonal head bolt 8. or specification for structural joints using astm a325 or a490 bolts, j. this specification is for the purchase of structural bolting assemblies and holding down bolts for constructional steelwork and should be used in conjunction with the national structural steelwork specification for buildings ( 6th edition) and the steel bridge group: model project specification for the execution of steelwork in bridge structures. * * call/ email to place an com mckinney corporation 4710 fastline drive / pdf lafayette, in 47905. bs 3692:, iso metric precision hexagon bolts, screws and nuts — specification. nuts that are carbide■ solution■ treated require additional letter a– 8a or 8ma. thread alloy studs made to astm specification a193. screws, bolts and other inch and metric industrial fasteners for immediate delivery from stock.