1、aiB WORLDWIDE STANDARD WE 900 APPENDIX A DATE: 1996 JUZY Gauging of the Recess of Pan, Raised Countersunk and Flat Countersunk Head Products Figure Al. Pan head - Penetration depth I - T Table Al. Dimensions Dimensions in mm f#& WORLDWIDE STANDARD l WB 900 APPENDIX A DATE: 1996 JULY Gauging of the R
2、ecess of Pan, Raised Countersunk and Fiat Countersunk Head Products Figure AZ. Raised countersunk - Penetration depth Table A2. Dimensions Dimensions in mm Recess Type 2 Nominal Size Penetration ReCesS Depth of Diameter m Recess E Driver Point max. min. nom. max. M2.5 1 1.75 1 1.5 1 2.8 1 2.04 M3 1
3、2.1 I 1.8 I 3.1 I 2.37 MIS.5 1 2.7 1 2.25 1 4.3 1 2.81 M4 3.1 2.65 4.6 3.14 M5 3.35 2.9 5.3 3.77 M6 3.85 3.4 7 4.33 M8 1 5.2 1 4.75 1 8.8 1 5.21 Ml0 1 6.05 1 5.6 1 9.9 1 6.43 Recess and 1 1 2 2 2 3 I 4 PAGE 2 OF 8 i WORLDWIDE STANDARD . wB900 APPENDIX A DATE: 1996 JULY Gauging of the Recess of Pan,
4、Raised Countersunk and Flat Countersunk Head Products Figure A3. Flat countersunk - Penetration depth Table A3. Dimensions Dimensions in mm PAGE 3 OF 8 0 WORLDWIDE STANDARD WB 900 APPENDIX A DATE: 1996 JULY Gauging of the Recess of Pan, Raised Countersunk and Flat Countersunk Head Products I Figure
5、A4. Type Z Recess - Dimensions F-F B-B , %zii / I- (SEE TABLES r 11 .- -m .- 3 i” Al, AZ ANU A5 PAGE 4 OF 8 B WORLDWIDE STANDARD WB 900 APPENDLX A DATE: 1996 JULY Gauging of the Recess of Pan, Raised Countersunk and Flat Countersunk Head Products I Table A4. Type Z Recess - Dimensions Dimensions in
6、mm Recess No. 1 2 3 4 t + 0.0 40 23” j” 3” 4O 23 - 15 d +T 46 45* 56” 15 56 15 - 0.0 NOTE: Minimum dimensions are controlled by the penetration gauge in Figure A6 and Table A6 PAGE 5 OF 8 m =lll11=lLbCl 0054355 87ll m tai!B WORLDWIDE STANDARD WB900 APPENDIX A DATE: 1996 JULY Gauging of the Recess of
7、 Pan, Raised Countersunk and Flat Countersunk Head Products A. 1 RECESS PENETRATION GAUGING. The penetration depth of the gauge shall be measured from the reference plane by using a dial gauge. NOTE 1. The penetration depth of the depth gauge (minimum and maximum dimension) is indicated in Tables A
8、1, A2 and A3 of this appendix. It is the test dimension for the usability of the cross recess. A typical recess penetration gauge is shown below. NOTE 2. The point of the gauge is shown in Fi,oure A7 for recess type Z. A sleeve serves to guide and fix the reference plane. This plane passes through t
9、he point of intersection of the recess wings and the top surface of the screw head. It corresponds thus to the surface of a screw with flat head. In case of crowned screw heads, it lies below the crown in the transition area from the recess wings to the surface of the head. For these screw heads, th
10、e reference plane is fixed with the help of the bearing surfaces of the gauge sleeve. Figure A6. Typical recess penetration gauge ZERO POSITION - GAUGE 7 REFERENCE PLANE 1 REFERENCE PLANE CONTROL PCX%ilON PAGE 6 OF 8 if% WORLDWIDE STANDARD , WB 900 APPENDIX A DATE: 1996 JULY Gauging of the Recess of
11、 Pan, Raised Countersunk and Flat Countersunk Head Products I Figure A7. Gauge point for recess type Z I- B - No 2, 3 k 4 POINT ENLARGE0 RIB DETAIL AT 8 PLANE ENLARGED VIEW OF DIMENSION P Y SECTION XX PAGE 7 OF 8 e WORLDWIDE STANDARD , wB900 APPENDIX A DATE: 1996 JULY Gauging of the Recess of Pan, Raised Countersunk and Flat Countersunk Head Products I Table A6. Dimensions of gauge point for recess type Z Dimensions in mm PAGE 8 OF 8 - =llJfl?lLbCl Oll54358 580 D
