ASME B18.2.3.4M-2001 pdf download

ASME B18.2.3.4M-2001 pdf download.METRIC HEX FLANGE SCREWS.
If verif able in-process inspeclion is used, inspection sample sizes and reporting shall be in accordance with the applicable ASME. ASTM. or SAF quality system consensus standard.
(b) For nondesignated dimensional characteristics, the piuvisions of ASME BIX.18.IM shall apply. Should a nondesignated dimension be determined to be outside its specifed limits. it shall he deemed conforming to this Standard if the user, who is the installer, accepts the dimension, based on form. ft and function considerations.
27 CLEARANCE HOLES
The recommended sires of clearance holes in material to be assembled using hex lange screws are the normal series given in ASME RlS.2.X.
28 DESIGNATiON
(a) Hex lange serews shall be designated by the following data, preferably in the sequence shosm: product name and designation of the standard, nominal diameter and thrcad pitch. nominal length. steel property clan or material identif cation, and protective coating, if required.
EXAMPtES:
(I) Ha fsngr screw Bl$,2J4M. MID x 1$ x 50, (lass 9$ sme plated per ASTM F 1941M and ASTM H Mi Fe/a S T>pe II. (2) lIes lange screw Hl$,2J.4ht. Mb * 2 * lix). (‘late 109, phuspbtc.oil. ASTM F t 137 tirade t.
(3) lIes (sage screw Bitt 23.4M. reduced diameter idy. (110 Type U. 1116 * 2 x Ito, Class 10.9 ailed.
(4) lIes range screw Bi52.3.4M, 1116 * I a 30. Al-iD ASThI F 73KM
NOTE: It is ecxnrnon practice at ISO standards to annfl thread pitch (nina dir nmnmal sin drsagnatwn whim screw threads ant the nitric coarse thr scries e.g.. 11)0 is 1110 * 1.5.
(h) For a recommended pan identifying number (PIN) system for metric hex lange screws, see ASME.
This Appendix deseribes the teslrnical differences bctween ASME HIX.23.4M-2001 and ISO 4162: 1990. its drafi rcvisicm, lSO.DIS 4162.2: 199t1, and related ISO standards.
Al PRODUCT NAMES BOLT AND SCREW
Of the poducts named bet flung screw per ASME ASME 1318.2.3.4M. those that arc threaded lull length would bc named heragon screw with flung per ISO 1X91, but those that are not threaded full length are flimiCd heiuin flung boll per ISO 4162: 1990, and hexagon bolt with flung per ISO 1X91 and ISODIS 4162,2: 19911.
A2 HEAD HEIGHT AND WRENCHING HEIGHT
ASME HI8.2.3.4M Table 5 specifes maximum head heights for M6. M12. and MI6. and minimum wrenching height for M 16. in agreement with ISODIS 4162.2: 19911, which arc increased from those spccifcd in ISO 4162: 1990.
A3 MAXIMUM WIDTH ACROSS CORNERS
ASME BIX.2.3.4M. Table 5 maximum width across corners is not specifed in ISO 4162. Instead. ISODIS 4759-I: May I 9911 would control the shape of the hexagon by iero positional tolerance at maximum material condition, which is not specifed in ASME
HI 112.3.4M
A4 GAGING OF HEX FLANGE HEAD
ISODIS 4162.2 would specify a gage C for gaging fangc thickness, which is not included in ASME
B1X.2,3.4M
A5 POSITiON OF HEAD
ASME Bl11.2.3.4M, pans. II and Table 2 specify positional tolerance at maximum material condition, as in 1501)15 4759-I: May 19911, instead of regardless of feature size, as in ISO 4759/I. l97L ISO/DIS 4759.
I: May 1998 also spccifcs position of the fange diameter with respect to the shank, which is not spccif ed
in ASME Bl8,2.3.4M.
A6 BEARING SURFACE
ASME Hl8.2.3.4M. pars. 13 and Table 5 spccit’ bearing surface concavity of 0.75±0,05 deg. as in ISO’ DIS 4162.2: 1998. which is a draft revision. ISO 4162:
1990 spccit’cs 0 to I degrees 30 minimum (0.75±0.75 degrees). ISO’DIS 4759-I: May 1998 specifes
straightness of radial lines on the bcanng surface. which is not specifed in ASMIS 111L2.3.4M. ASMIS Bl8.2.3.4M, Table 2 values for circular runout of the bearing circle are greater than those in ISO 47591- 1978 tw ISO/DIS 4759-I: May 1998.
A7 FILLETS
ASME BlX.2.3.4M. iablc 3 minimum fIlet transition diameters and shorter masimum filet lengths for screws threaded full length are not specifed in ISO’DIS 4162, for Type U filet, the radius of the fIlet cxtcnslon. r4 reference in 1501)15 4162, 15 not specifed in ASME B18.2.3,4M,
A8 BODY DIAMETER FOR SCREWS THREADED FULl. LENGTH
ASME BlX.2.3.4M. Tables 3 and 4 minimum diameters of unthreaded shank for screws threaded full length are not specifed in ISODIS 4162.