Forged In USA = CRAFTSMAN = BLACK OXIDE Finish , 10 piece, METRIC Combination Wrench Set!! Includes METRIC Sizes : 10mm , 11mm, 12mm , 13mm , 14mm , 15mm , 16mm , 17mm , 18mm , 19mm.+ All Made In U. + All 12 point box ends. + All BLACK OXIDE Finish! + VERY RARE METRIC SET! Premium Quality American Made Hand Tools!
For Industrial / Professional use. Lasts a lifetime , and more. Corrosion Protection Depending on the post-treatment applied, black oxide coating can give corrosion resistance equivalent to 144 hrs of salt spray exposure. Other applications are designed to provide extended shelf life for stored parts prior to their use or to prepare them for further surface treatment (painting). Dimensional Stability Black oxide adds no more than 5 to 10 millionths of an inch to the dimension of a part (it also penetrates to an approximate depth of 5 to 10 millionths).
For all intents and purposes, the as-formed dimensions do not change (as they do when painted or plated). This provides corrosion protection for critical-size parts. Improved Lubricity Oil post-treatment not only protects against corrosion, but the oil itself results in smoother running, mating parts. Anti-galling Where break-in of mating parts is necessary, the anti-galling surface lets the outer lubricating layer be sacrificed during initial contact and abrasion while work-hardened surfaces are formed. The black oxide itself has a hardness of 5.5 on the Mohs Scale.
Decorative Finish The resulting lustrous black finish adds visual appeal and a quality image at a very low cost. Harder parts, 40 Rockwell C and above, tend to have glossier finished.
Softer parts tend to have matte finishes. Reduced Light Glare Moving machine parts, hand tools, and surgical instruments coated with black oxide reflect less light and reduce eye fatigue when used under bright lights. Pre-treatment for Paint Black oxide greatly improves the adhesion qualities of the metal, allowing paint and other finishes to hold better, last longer.
It also minimizes paint chipping and flaking. Conductivity Black oxided parts experience no more than a 1% reduction in conductivity, making it a suitable treatment for electrical parts. No Embrittlement Unlike painted or plated parts which are oftentimes acid etched, no hydrogen embrittlement accompanies black oxiding. However, if parts are already scaled or rusted, they may require pickling prior to black oxide and some embrittlement may occur.Baking of the parts within four hours after black oxide application will relieve this problem. On extremely hard parts, 55 Rockwell C or above, and very thin springs, there is a possibility of caustic embrittlement. This condition can be minimized by careful control of the black oxide cycle time.
Cost Competitive It is very difficult to achieve the same protection, appearance and performance qualities from other finishing processes for the same low cost as black oxide. Spanner +>> Check out all the other Craftsman USA tools available in my other items for sale!
Made In USA BLACK OXIDE SAE standard inch SET!! Tool wrench roll organizer holder available >>. The item "USA Made = CRAFTSMAN = BLACK OXIDE FINISH METRIC WRENCH SET 10-19mm combination" is in sale since Friday, March 8, 2019. This item is in the category "eBay Motors\Automotive Tools & Supplies\Hand Tools\Wrenches".
The seller is "gtsolutions9" and is located in Florida. This item can be shipped to United States, Canada, United Kingdom, Australia, Mexico, Germany, Japan, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Turks and caicos islands, Barbados, Brunei darussalam, Bolivia, Ecuador, Egypt, Guadeloupe, Iceland, Jordan, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.