GB/T 16823.1-1997 Stress area and bearing area for threaded fasteners
1 Scope
This standard specifies the stress area of threaded fasteners (hereinafter referred to as stress area) and the area of the bearing surface for bearing load (hereinafter referred to as load area).
The stress area is applicable to calculation of the stress for the external thread. It is also applicable to calculation of proof loads for internal thread. The thread dimensions and tolerances shall comply with GB 193, GB 196 and GB 197.
2 Normative references
The following standards contain provision which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions listed were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 8-88 Square head bolts - Product grade C
GB 67-85 Slotted pan head screw
GB 70-85 Hexagon socket head cap screws
GB 152.2-88 Fasteners - Countersinks for countersunk head screws
GB 152.3-88 Fasteners - Counterbores for hexagon socket head screws and slotted cheese head screws
GB 152.4-88 Fasteners - Counterbores for hexagon bolts and nuts
GB 193-81 General purpose screw threads - Diameters and pitches (diameter 1~ 600 mm)
GB 196-81 General purpose screw threads - Basic dimensions for diameter from 1 to 600 mm
GB 197-81 General purpose screw threads - Tolerances and fits for diameter from 1 to 355mm
GB 818-85 Cross recessed pan head screw
GB 3104-82 Fasteners - Widths across flats of hexagon products
GB 5276-85 Fasteners - Bolts, screws, studs and nuts - Symbols and designations of dimensions
GB 5277-85 Fasteners - Clearance holes for bolts and screws
GB 5787-86 Hexagon flange bolt - Product Grade B
3 Stress area
3.1 Stress area is calculated using equations (1) and (2). The obtained numerical value shall be rounded in three significant figures unless special reasons exist.
Foreword i
1 Scope
2 Normative references
3 Stress area
4 Load area
