ASME B107-1:2004 pdf download Nutdrivers
4.1.3 Type ll: Stubby Length. Type I nutdrivers shallconsist of round steel shaft with socket at one end anda handle at the other end. A bolt clearance 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 conventional 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 lll: Miniature Handle. Type Il nutdriversshall consist of a round steel shaft with a socket at oneend and a handle at the other end. A bolt clearance holeshall be provided in the shaft socket end. The nutdrivershall be similar to Fig 4 and conform to the Table 4 o4M for the size specified. Handle and/or shaft shall becolor-coded.
4.2 Materials
The materials used in the manufacture of nutdriversshall be such as to produce tools conforming to therequirements specified herein.
4.3Marking
Nutdrivers shall be marked in a plain and permanenmanner 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 E 18. 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. 5.]and 5.2 and the applicable tables without failure or permanent deformation (set) that might affect durability orserviceability.
4.6 Socket Opening
Socket openings shall be 6-point and conform to thegaging requirements of ASME B107.17M.Manufactur-ing process or pilot holes, if present in the socket openings, shall not exceed the minimum allowable acrossflats dimension times 1.04.
4.7 Shaft Finish
4.7.1 Surface Finish, Socket and shaft surfaces shallhave a rust preventive treatment and be essentially freefrom pits, nodules, burrs, cracks, and other conditionsthat would adversely affect the performance or safetyof the tool. When provided, coatings shall be adherent,smooth, continuous, and free from any conditions thatwould interfere with their protective value, safety, andfunction. The socket and shaft shall have a maximumof 125 win.(3.18 m) [arithmetic average] finish whentested in accordance with ASME B46.1. All edges andcorners shall be smooth.
4.7.2 Coatings. The sockets, shafts, and internal driv-ers shall be coated with one (or a combination) of thefollowing coatings:
(a) Nickel-Chromium Coating. The coating shall be abright, protective, decorative nickel-chromium plating.and shall pass the surface adhesion test as specified inthe file, grind-saw, or heat quench test of ASTM B 571Nutdrivers shall either pass the Alternative Coating Test(para.5.4) or have minimum coating thicknesses of0.0002 in.(0.0051 mm) for nickel or nickel-iron and0.000005 in.(0.00013 mm) for chromium.