Abstract： ASME B18.31.3:2014 pdf download.Threaded Rods(Inch Series). 2.2 Threads Unified threads shall conform to the requirements of ASME Hi.!. For UNC and UNF threads, (lass IA will 1w furnished unless otherwise specified. Class 2A shall be applic...

ASME B18.31.3:2014 pdf download.Threaded Rods(Inch Series).

2.2 Threads

Unified threads shall conform to the requirements of ASME Hi.!. For UNC and UNF threads, (lass IA will 1w furnished unless

otherwise specified. Class 2A shall be applicable for 8UN threads and at the manufacturer’s option for other series, and for sizes where (lass IA is not applicable. Plated threads shall conform to ASMF. 81.1, (lass 3A high limit (bsii) and the low limit

requirement of the before-coated or plated thread class.

Acme threads shall meet the requirements of ASME Bl.5, Class 2G.

Table 1 contains the thread diameter and Lhreads per mcli combinations for Unified and Acme thread sizes considered standard.

2.3 Thread Acceptance Gaging

Unless otherwise specified by the purchaser. gaging for screw thread dimensional acceptahthty shall be in accordance with Gaging

System 21 as specified in ASME 813.

2.4 Ends

The ends shall be of sufficient worknianship to allow for eas assembly with an appropriate mating nut.

2.5 Straightness

When required, straightness limits arid the inspection technique to be used to evaluate straightness shall be agreed upon between

the purchaser and the supplier.

2.6 Materials and Mechanical Requirements

The purchaser must specify the applicable specification for the threaded rod material. The material shall meet the chemical and

mechanical properties of the applicable specification. Lisled below are some of the primary material specifications for threaded

rod. Other materials may be specified by the purchaser.

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