1、FORD WORLDWIDE FASTENER STANDARDDate: 1996-10-01Engineering Standards & 1 of 2 Printed copies are uncontrolled .Systems Engineering (ESSE)WE 952Mechanical Properties of Nuts with Specified Proof Load Values1. SCOPE.This standard specifies the mechanical properties of nuts with specified proof load v
2、alues when tested atroom temperatures (ISO 1).NOTE: All requirements of ISO 898/2 apply unless otherwise specified in this standard.2. REFERENCES.ISO 1 - Standard reference temperature for industrial length measurements.ISO 898/2 - Mechanical properties of fasteners - Part 2: Nuts with specified pro
3、of load values.WE 990 - Surface discontinuities for nuts.3. DESIGNATION SYSTEM.In line with ISO 898/2, Clause 3.4. PROOF LOADS.The proof load table in this standard have been provided to assist Design Engineers.5. SURFACE INTEGRITY.For referee purposes, surface integrity shall be in accordance with
4、WE 990.FORD WORLDWIDE FASTENER STANDARDDate: 1996-10-01Engineering Standards & 2 of 2 Printed copies are uncontrolled .Systems Engineering (ESSE)WE 952Mechanical Properties of Nuts with Specified Proof Load ValuesTable 1 shows Proof Loads for ISO Metric Coarse Threads. This table has been provided t
5、o assist Design Engineers. Forall other requirements ISO 898/2 shall be referenced.Table 1. Proof load values - Coarse threadNominalThreadPitch ofthe ThreadNominal StressArea of theProperty ClassDiameter Mandrel 04 05 8 10 12mm mm A s mm 2 Proof load (A s x S p ), N33.5456781012141618202224273033363
6、90.50.60.70.8111.251.51.75222.52.52.5333.53.5445.036.788.7814.220.128.936.658.084.31151571922453033534595616948179761 9102 5803 3405 4007 64011 00013 90022 00032 00043 70059 70073 00093 100115 100134 100174 400213 200263 700310 500370 9002 5003 4004 4007 10010 00014 50018 30029 00042 20057 50078 500
7、96 000122 500152 000176 500229 500280 500347 000408 500488 0004 0005 4007 00011 50016 30023 40030 40048 10070 80096 000131 900176 600225 400278 800324 800422 300516 100638 500751 600897 9005 2007 0509 15014 80020 90030 10038 10060 30088 500120 800164 900203 500259 700321 200374 200486 500594 700735
8、600866 0001 035 0005 8007 80010 10016 30023 10033 20042 50067 300100 300136 900186 800230 400294 000363 600423 600550 800673 200832 800980 4001 171 000NOTE: P.C. 12 has been included for combination with P.C. 10.9 fas teners that are to be tightened beyondthe proof load (i.e., yield point tightening).See ISO 898 Part 2 Annex - Loadability of bolted connections.
