Performance Paramteres Types of Wrenches Type A Grade of Wrenches Heavy duty Nominal size of Wrenches (length in mm) 375 The opening of jaws shall be easily and conveniently adjustable at any opening up to the maximum opening of wrench and shall remain in the required position till further adjustment Yes The Worm shall rotate freely and the jaw shall slide smoothly for the entire range of the wrench Yes Wrenches shall not have forging defects, such as over heating, unfilling, scales, pits, laps and cracks Yes Incase of cast iron wrenches, the casting shall be of uniform quality and reasonably smooth finish free from casting defects, such as blow holes, porosity, shrinkage, cold shut and cracks NA for Heavy duty and Normal duty wrenches All parts of the wrenches shall be adequately protected against corrosion and rust Yes Tolerence on Width across Flats shall be as per IS 6149 Yes Wrenches (Spanners) shall be finished smooth all over and sharp corners shall be removed Yes Wrenches (spanners) and sockets shall be free from burrs, cracks, seams or other manufacturing defects Yes Warranty (Years) 1 The adjustable wrenches shall be clearly and legibly marked nominal width across flats and manufactures intials or trade mark or both Yes Standards Conformity to IS: 6131 (1980) for technical requirements for Hand operated wrenches and IS: 6149 (1984) Adjustable Single-ended open jaw wrenches (Spanners) Yes BIS marked No If BIS marked Yes indicate BIS lisence no other wise indicate NA NA Dimensional and Material Parameters Material Chrome-molybdenum steel bars conforming to IS : 963-1958 (for heavy duty wrenches) Material for adjustable Jaws Steel conforming to Designation 45 C8 of IS : 1875-1978 Finish/Coating of wrenches Phosphate Coating Maximum opening of adjustable jaw (mm) + Tolerance(3 mm) 41 Weight of Wrenches in gms 950 gram Reports Availbility of test certificate from Government/ NABL/ ILAC accerdited lab to prove confirmity of specifications No Copy of Test report shall be furnished to buyer on demand NA