The Dictionary of Quality Standards
BS A 227 +


Standard No Title of Standard ISBN Published Also Known As
BS A 227 Specification for steel pan head bolts (short thread: Class 3A 0 580 39552 9 29/12/1965 A227:1965
BS A 232 Specification for 100$0D countersunk head steel bolts (160 000 0 580 00059 1 29/02/1968 A232:1968
BS A 233-236 Specification for plain hexagonal thin nut (of Class 3B UNJ th 0 580 06289 9 31/03/1971 A233-236:1971
BS A 237-240 Specification for plain hexagonal nut (of Class 3B UNJ thread) 0 580 06279 1 31/03/1971 A237-240:1971
BS A 242; A 243; A 244; A 245 Specification for hexagonal castle nuts (of Class 3B UNJ threa 0 580 08444 2 24/06/1974 A242; A243; A244; A245:1974
BS A 246; A 247; A 248; A 249 Specification for slotted hexagonal thick nuts (of Class 3B UN 0 580 08454 X 24/06/1974 A246; A247; A248; A249:1974
BS A 250; A 251; A 252; A 253 Specification for slotted hexagonal shear nuts (of Class 3B UN 0 580 08464 7 24/06/1974 A250; A251; A252; A253:1974
BS A 254; A 255 [...] Specification. Hexagonal head titanium alloy bolts 160 000 lbf 0 580 08706 9 31/03/1976 A254; A255 [...]:1976
BS A 260; A 261 [...] Specification for metric screws 0 580 09156 2 31/08/1976 A260; A261 [...]:1976
BS A 266; A 267 [...] Specification for 100$0D countersunk head titanium alloy bolts 0 580 09438 3 31/01/1977 A266; A267 [...]:1977
BS A 272 Specification for Hi-torque speed drive recess: dimensions and 0 580 09772 2 29/04/1977 A272:1977
BS A 273 Specification for gauging practice for 100$0D countersunk head 0 580 09786 2 31/01/1978 A273:1978
BS A 275; A 276 [...] Specification for hexagon self-locking nuts with non-metallic 0 580 11773 1 27/02/1981 A275; A276 [...]:1981
BS A 281; A 282 [...] Specification for hexagon (thin) self-locking nuts with non-me 0 580 12367 7 30/11/1981 A281; A282 [...]:1981
BS A 287; A 288 [...] Specification for hexagon socket head cap screws. Metric serie 0 580 13119 X 31/12/1982 A287; A288 [...]:1982
BS A 297 Specification for internal drive, offset cruciform recess (Tor 0 580 15841 1 31/03/1987 A297:1987
BS A 298 Methods of test for self-locking nuts with maximum operating t 0 580 16382 2 29/01/1988 A298:1988
BS A 299 Specification for procurement of alloy steel protruding head b 0 580 17460 3 31/10/1989 A299:1989
BS A 300 Specification for procurement of alloy steel bolts with streng 0 580 17459 X 31/10/1989 A300:1989
BS A 301 Procurement of corrosion and heat-resisting steel bolts with s 0 580 17461 1 31/10/1989 A301:1989

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