Abstract： ASME B18.16.6:2008 pdf download.Nylon Insert Locknuts(Inch Series). In cases when nuts are given a protective coating or are cleaned following delivery to the purchaser, the nut producer shall not be held responsible for failures of the nut...

ASME B18.16.6:2008 pdf download.Nylon Insert Locknuts(Inch Series).

In cases when nuts are given a protective coating or are cleaned following delivery to the purchaser, the nut producer shall not be held responsible for failures of the nut to meet dinwnsional, mechanical, or performance requirements traceable to plating,

coating, or cleaning practice.

11.1.4 Hydrogen Embrittlement. Nuts shall not be embrittled. When heal-treated nuts are electroplated or phosphate coaled,

appropriate plating or coaling pmcesses should be employed to avoid hydrogen embrittle. meni If necessary, the product shall be

suitably treated as soon as practicable alter plating or coating to preclude detrimental hydrogen embrittlement,

11,2 Mechanical Requirements

11.2.1 Prod Load. Nuts shall withstand the proof load specified for the applicable grade and thread series in Table 2 or 3 when

tested as specified in paris. 12.1.

11.2.2 Hardness. Nuts shaLl have a hardness conforming to the limits specified for the applicable grade in Table 5 when tested as

specified in para. 12.2.

11.3 Performance Requirements

11.3.1 Prevailing-Torque. The prevailing-torque developed by nuts during their first installation, or any subsequent installation

or removal, shall not e,ceed the masimum first installation torque specified br the applicable grade in Table 2 or 3 when tested as specified in para. 12.3. In addition, minimum prevailing-torque generated by nuts during their first and fifth removals shall not

be less than the respective removal torques specified for the applicable grade in Table 2 or 3.

12 TEST ME1HODS

12J Proof Load Test

The test sample nut shall be as.sen’ihled on a test boll (see para. 121.1) or on a hardened mandrel (see para. 12.1.2) with a

minimum of three threads projecting through the nut. The proof load test may be performed prior to the prevailing.torque feature being added to the nut, For referee lest purposes, the hardened mandrel shall he used and the prevailing-torque feature present. The masimum prevailing-torque occurring during the assembly of the nut on the test bolt or mandrel shall be recorded.

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