ASME B107.12:2004 pdf download Nutdrivers
4.1.3 Type I: Stubby Length, Type Il nutdrivers shallconsist of round steel shaft with socket at one end anda handle at the other end. A bolt cearance hole shall beprovided in the shaft of the socket end. The nutdrivershall be similar to Fig. 3 and conform to Table 3 or3M for the size specified. Style A nutdrivers shall beprovided with a conventio nal color-coded handle and/or shaft Style B nutdrivers shall be provided with acushion grip handle and need not be color-coded .
4.1.4 Type I: Miniature Handle. Type Ill nutdriversshall consist of a round steel shaft with a socket at oneend and a handle at the other end. A bolt cearance holeshall be provided in the shaft socket end. The nutdrivershall be similar to Fig. 4 and conform to the Table 4 or4M for the size specified. Handle and/or shaft shall becolor-co ded.
4.2 Materials
The materials used in the manufacture of nutdriversshall be such as to produce tools conforming to therequire ments specified herein.
4.3 Marking
Nutdrivers shall be marked in a plain and permanentmanner with manufacturer’s name or with a trademarkof such known character that the manufacturer shall bereadily determined. Marking shall include the productnumber and nominal socket opening size.Marking shallbe as permanent as the normal life expectancy of thenutdriver to which it is applied (providing the markedsurface has not been subjected to a fretting or abradingaction) 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 HRCor case-hardened 0.005 in (0.127 mm) deep (minimum)to a hardness not less than 89 HR15n when tested inaccordance with ASTM E18. When surface preparationis necessary, the amount of material removed in thearea contacted by the indenter shall not exceed 0.007 in(0.178 mm)
4.5 Tests
Nutdrivers shall pass the tests specified in paras. 51and 5.2 and the applicable tables without failure or per-manent deformation (set) that might affect durability orservicea bility.
4.6 Socket Opening
Socket openings shall be 6-point and conform to the gaging requirem ents of ASME B1 07.1 7M . Manufa ctur- ing process or pilot holes, if present in the socket open- ings, shall not exceed the minim um allowable across flats dimension times 1 .04.
4.7 Shaft Finish
4.7.1 Surface Finish.
Socket and shaft surfaces shall have a rust preventive treatment and be essentiall y free from pits, nodules, burrs, cracks, and other conditions that would adversely affect the performa nce or safety of the tool. When provided , coatings shall be adherent, smooth, continuous, and free from any conditions that would interfere with their protective value, safety, and function.
ASME B107.12:2004 pdf download
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