2017 China New Design ASTM A193 B7 Heavy Hex Bolts for Swedish Manufacturer

A193 B7 Heavy Hex Bolts Heavy Hex Cap Screws Standard: ASME/ANSI B18.2.1, ASME/ANSI B18.2.3.7M (Various types of head are available) Inch Size: 1/2”-2.3/4” with various lengths Metric Size: 1/2-M72 with various lengths Grade: ASTM A193 B7 Finish: Black Oxide, Zinc Plated, Zinc Nickel Plated, PTFE etc. Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality and Strict Quality Control, Competitive Price,Timely Delivery; Technical Support, Supply Test Reports Please feel free to contact us for more details.

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    “TachyRail” of GEO-METRIK

    is a tool for the measurement technical processing of railways.
    It can be used for various tasks at the planning,
    for the construction and the maintenance of railways.

    The product consists of:
    - the rail-trolley
    - a component for the position regulation of the trolley
    - different software module

    Into dependence of the existing outer framework conditions and the provided task,
    the regulation of the position of the trolley is carried out with the robot-tacheometer or by means of GPS.

    TachyRail is used for:

    – the new building of railways in ballast superstructure and slab track
    – fixture of turnout
    – supervision of railway on a rotational basis
    – determination of standard value for the tamping of tracks
    – first-time registration of track geometry
    – flexible insert during disasters

    www.geo-metrik.de



    Here is the freshly reassembled product of a check up. This custom AR-15 build was taken down. First I tried to remove the hand guard. Just my luck, the screws had seized. I made sure I had the right hex wrench and put a little torque on them, stripped – typical of Jon’s luck.

    I always have this ‘go with easiest and quickest’ problem solving issue. I really would recommend going through the manufacturer first, I just was excited to work on my gun some more.

    I slotted the screws, for removal with a flat head screwdriver. If you look closely in the video when I show the old hex head you will see ramps as a result of more broken/stripped material.

    At this point I considered drilling out a hole for my reverse threaded removal tool but opted just to drill off the head and go from there.

    Three screws seized, three drilled out.

    The next step was to drill six new holes aligned with the treads on the barrel nut. Drill press, new screws, grease the screws and installed them. Almost done.

    I have some options to either fill or leave the holes, and I will probably duracoat the stainless torx screw heads.

    Before I do any of that, I will test fire it.