MIL-DTL-2710C
4.4.4 Marking examination. The markings on the C-link and right hand coupling plate
surfaces shall be visually examined. If the letters and figures are poorly embossed and
unreadable, it will be permissible to machine or grind the embossing to produce readable letters
and figures. Machining or grinding below the surface line of the C-link or coupling plate is not
permitted and shall be cause for rejection of the detachable link. Markings shall meet the
requirements specified in 3.15 through 3.15.2.
4.4.5 Identification numbers examination. The identification numbers on the C-link and
coupling plate shall be visually examined. If the stamping exceeds the maximum depth or if the
stamping was struck by dies other than the low stress type, the detachable link shall be rejected.
The identification numbers shall be as specified in 3.16.
4.4.6 Examination of coupling plates fit on C-link. The coupling plates shall be placed
on the C-link without the taper pin installed. There shall not be any movement between the
coupling plates and the C-link as specified in 3.10. If there is movement between the coupling
plates and the C-link, it will be permissible to refit the coupling plates on the C-link (see 3.10)
and the fit reinspected. If movement is still present, the detachable link shall be rejected. If
more than two detachable links are rejected because of the coupling plate fit, the entire lot of
detachable links shall be inspected.
4.4.7 Examination of taper pin engagement. The taper pin, when driven tightly into the
detachable link, shall be visually examined. If the paint applied to the detachable link fails the
examination, the detachable link may be sandblasted to white metal, repainted (see 3.17), and
reinspected. The finish shall be as specified in 3.17. If the taper pin engagement in the coupling
plates does not conform to the required dimensions, the detachable link shall be rejected. If
more than two detachable links are rejected, then the entire lot of detachable links shall be
inspected for taper pin engagement. The taper pin shall meet the requirements specified in 3.11.
4.4.8 Examination of hairpin fit. The fit of the hairpin and the projection of the hairpin
ends beyond the coupling plate shall be in accordance with 3.12. If the ends of the hairpin
project less than the minimum specified length beyond the coupling plate, the hairpin shall be
rejected. The hairpin ends shall not be bent and the hairpin shall be removed following the
examination.
4.4.9 Examination of finish. The paint shall show no film failures, such as loss of
adhesion, blistering, pinholing, checking, or cracking. The plug bore in the coupling plates shall
be examined for evidence of paint on the surface. The finish shall meet the requirements
specified in 3.17.
4.5 Testing methods.
4.5.1 Chemical composition. The material samples selected in accordance with 4.2.1.2
shall be analyzed to determine the chemical composition. The chemical composition of the
material used in the manufacture of the C-link and coupling plates (see 3.2.1.1), the taper pin
(see 3.2.2.1), the plug (see 3.2.3.1), the hairpin (see 3.2.4.1) for the first article and product
testing shall be verified by a chemical or spectrographic analysis conducted by the detachable
link manufacturer. Material not within the composition tolerances shall be rejected.
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