Abstract： ASME B107.12:2004 pdf download.Nutdrivers. 4.1.3 Type II: Stubby Length. Type II nuidrivers shall consist of round steel shaft with socket at one end and a handle at the other end. A bolt clearance hole shall be provided in the shaft of the...

ASME B107.12:2004 pdf download.Nutdrivers.

4.1.3 Type II: Stubby Length. Type II nuidrivers shall consist of round steel shaft with socket at one end and a handle at the

other end. A bolt clearance hole shall be provided in the shaft of the socket end. The nutdriver shall be similar to Fig. 3 and

conform to Table 3 or 3M for the size specified. Style A nutdrivers shall be provided with a conventional color-coded handle and/

or shalt. Style B nutdrivers shall be provided with a cushion grip handle and need not be color-coded.

4.1.4 Type Ill: Miniature Handle. Type Ill nutdrivers shall consist of a round steel shaft with a socket at one end and a handle at the other end. A bolt clearance hole shall be provided in the shaft socket end, The nutdriver shall be similar to Fig. 4 and

conform to the Table 4 or 4M for the size specified. Handle and/or shaft shall be color-coded.

4.2 MateriaLs

The materials used in the manufacture of nutdrivers shall be such as to produce tools conforming to the requirements specified

herein.

4.3 MarkIng

Nutd rivers shall be marked in a plain and permanent manner with manufacturer’s name or with a trademark of such known character

that the manufacturer shall be readily determined. Marking shall include the product number and nominal socket opening size.

Marking shall be as permanent as the normal life expectancy of the nutdriver to which it is applied (providing the marked surface

has not been suhected to a fretting or abrading action) and be capable of withstanding the cleaning procedures normally experienced during its intended use.

4.4 Hardness

The socket shall be hardened to not less than 35 1 IRC, or case-hardened 0.005 in. (0.127 mm) deep (minimum) to a hardness not less than 89 HR15n when tested in accordance with ASTM E 18. When surface preparation is necessary, the amount of material removed in

the area contacted by the indenter shall not exceed 0.007 in. (0.178 mm).

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