Abstract： ASME B18.2.3.9M:2001 pdf download.METRIC HEAVY HEX FLANGE SCREWS. If verifiable in-process inspection is used, inspection sample sizes and reporting shall be in accordance with the applicable ASME/ASTM. or SAF quality system consensus stand...

ASME B18.2.3.9M:2001 pdf download.METRIC HEAVY HEX FLANGE SCREWS.

If verifiable in-process inspection 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 provisions of ASMF. B 18.18.1 M shall apply. Should a non- designated

dimension be determined to he outside its specified limits, it shall be deemed conforming to this Standard if the user, who is the installer, accepts the dimension, based on form, lit, and function considerations.

27 CLEARANCE HOLES

The recommended sizes of clearance holes in material to be assembled using heavy hex flange screws are the normal series given in

ASME B 18.2.8.

28 DESIGNATION

(a) Heavy hex flange screws shall be designated by the following data, preferably in the sequence shown: product name and

designation of the standard, nominal diameter and thread pitch, nominal length. steel property class or material identification,

and protective coaling, if required.

EXAMPLES:

(1) Heavy hes flange screw HIX.2.3.9M. MI0 K Ii x 50. Class 9.5. zinc plated per ASTM F 87154 and ASTM B 633 FcIZn 5 Type II.

(2) Heavy hex flange screw HlS.2.39M. M16 K 2 K 100, Clas.s 10.9. phosphaiclod. ASTM F 1137 Grade I.

(3) Heavy hex flange screw Bl8.2.3.9M. reduced diameter hody. lilici Type U. 5416 x 2 x O. Class 10.9 oiled.

(4) Heavy hcx flange screw Bl8.2.3.9M. M16 K I K 30. couosio resistant sicd Al-70 ASTM F 738M.

NOTE: It is common practice in ISO standards to omit thread pitch from the nominal size designation when screw threats are the

metric coarse thread series.

(b) For a recommended part identifying number PIN system for metric heavy hex flange screw. see ASME 818.24.1.

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