MIL-DTL-2710C
3.10 Fit of coupling plates on C-link. Coupling plates shall be fitted to the C-link in
accordance with the applicable drawings as specified in 3.7. There shall not be any movement
between the coupling plates and C-link at the C-link opening (see 4.4.6).
3.11 Taper pin engagement. The taper pin shall be driven into the assembled detachable
link (see figure 2) with the required assembly punch specified in drawing 804-840327. The taper
pin depth of engagement in the coupling plates shall be as specified in the drawings specified in
3.7 (see 4.4.7).
3.12 Hairpin fit. Hairpin, when specified (see 6.2), shall be installed after the taper pin is
driven home (see 3.11, figure 1, and figure 2). With the hairpin fully seated in the groove of the
coupling plate, the ends of the hairpin shall project a minimum of 2-1/2 hairpin diameters and a
maximum of 3 hairpin diameters beyond the groove of the opposite coupling plate (see 4.4.8).
3.13 Proof load. The detachable link shall withstand the proof load specified in table III
(type I) and table IV (type II) without developing any surface fracture or defects which would
interfere with the serviceability or disassembly of the detachable link (see 4.5.3).
TABLE III. Physical properties for type I detachable links.
Link size
Type I,
Proof load
Minimum breaking
(inches)
class
(lbs)
load (lbs)
91,100
67,500
3/4
119,000
88,200
7/8
156,700
116,100
1
195,000
145,000
1-1/8
240,600
178,200
3
1-1/4
285,500
211,500
1-3/8
340,200
252,000
1-1/2
395,000
292,500
1-5/8
476,000
352,000
1-3/4
432,000
285,000
1-7/8
488,000
322,000
2
548,000
362,000
2-1/8
610,000
403,000
1
2-1/4
675,000
447,000
2-3/8
744,000
492,000
2-1/2
813,000
540,000
2-5/8
2-3/4 HD 1
2
649,000
981,000
2-7/8
1
640,000
965,000
3 HD 1
2
762,000
1,150,000
1,128,000
748,000
3-1/8
1,250,000
1
805,000
3-1/4
1,304,000
862,000
3-3/8
7
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