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This standard defines property classes, the metric equivalent of a screw grade, that are almost identical to those defined by ISO 898-1, [2] except for the addition of the 8.8.3 and 10.9.3 classes. These two additional standards are fasteners that have the same mechanical properties as their base property class (i.e. 8.8 and 10.9), but are made ...
Because electrolytically zinc-plated surfaces provide comparatively little corrosion protection, and in the case of galvanic zinc coatings on high-strength steel (e.g. category 10.9 and 12.9 high-strength bolts) there is a risk of hydrogen embrittlement, the industry needed a better corrosion protection system.
ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from alloy steel.The imperial standard is officially titled Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, while the metric standard (M) is titled Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural ...
The numbers stamped on the head of the bolt are referred to the grade of the bolt used in certain application with the strength of a bolt. High-strength steel bolts usually have a hexagonal head with an ISO strength rating (called property class) stamped on the head. And the absence of marking/number indicates a lower grade bolt with low strength.
Screw with blackening. Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [1]
Spherical wheel lock bolt and associated key, the latter with stepped 17 mm and 19 mm AF hex drive In countries where the theft of alloy wheels is a serious problem, locking nuts (or bolts, as applicable) are available — or already fitted by the vehicle manufacturer — which require a special adaptor ("key") between the nut and the wrench to ...
Effective firing range: 500 m (550 yd), 850 m (930 yd) with optical sights: Feed system: 5-round integral box magazine, loaded with 5-round stripper clips: Sights: Rear: ladder, graduated from 100 m to 2,000 m (M91/30) and from 100 m to 1,000 m (M38 and M44); Front: hooded fixed post (drift adjustable) PU 3.5 and PEM scope also mounted
Free-machining grade with reduced molybdenum and correspondingly increased phosphorus and sulfur for automatic machine screw parts as well as surgical implants and pharmaceutical processing equipment. 316N: 16–18: 10–14: 0.08: 2: 0.75: 0.045: 0.03: 0.10–0.16: 2.0–3.0: High-nitrogen grade with increased resistance to pitting and to ...