MIL-DTL-18295F
3.5 Welded chain components. Unless otherwise specified (see 6.2), chain links shall be heated,
bent, and flash butt welded (see 4.6.9.1 and figure 1a.).
3.5.1 Heating and bending. Heating of the bars prior to bending shall be controlled to prevent
undue scaling, flaking, or bend ripples in the grip area. Defects may be removed and blended
smooth to adjacent surfaces provided the required dimensions are maintained.
3.5.2 Bar misalignment. The transverse bar end misalignment shall be not greater than
2.5 percent of the bar diameter.
3.6 Stud links. Unless otherwise specified (see 6.2), studs for stud links shall be the inserted type
(see figures 1a-1, 1a-2, and 1a-3). The chain studs shall be drop forged and have the same
chemical and physical properties as the link. The stud shall not have lugs or protrusions and the
end(s) of the stud shall be in contact with the link. The stud shall be pressed into the link body.
The chemical composition for each heat of steel shall be part of the CoC.
3.6.1 Stud welding. The stud shall have a circumferential weld on the end opposite the flash
weld. Welding shall be in accordance with AWS D1.1 or MIL-STD-248. Welding shall be
performed prior to the heat treatment process (see figures 1a-1, and 1a-2).
3.7 Cast components. Unless otherwise specified (see 6.2), other components shall be cast or
otherwise fabricated at the manufacturer's discretion and shall meet all requirements as specified
herein.
3.7.1 Surface contour at parting lines. The contour of the surface at the parting of adjacent mold
halves shall conform to the surrounding contours or be slightly positive. The surface at the point
shall meet the required component dimensions.
3.7.2 Material surface. Burrs and rough edges shall be removed and made flush to adjacent
contours. Components shall be free from surface cracks, dents, gas holes, aligned porosity, laps,
seams, fins, or cuts.
3.8 Markings.
3.8.1 Assemblies. All accessories and the stud of the last link on each of the 90-foot (27.4 m)
shot of chain shall bear a symbol or marking to show the contract year and serial number of the
chain. Each stud and all accessories shall have permanent markings to denote chain size,
manufacturer, and FM3. Components of equal size which fit a range of nominal chain size shall
be marked with the range of sizes. Markings for manufacturer, contract year, chain size, and FM3
shall be raised or stamped (see figures 19 and 20). Steel stamps, for serial numbers, shall have
rounded characters to prevent stress concentration and have not less than 0.375-inch
(9.5 mm) nor more than 0.75-inch (19 mm) letter height and shall be not less than 0.09-inch
(2.3 mm) nor more than 0.125-inch (3 mm) in depth. The markings shall be visible after coating
the component and located as shown on figures 19 and 20. All stamped markings shall be
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