MIL-DTL-27235B
3.1.1 Carbon steel. Type I clevis pins shall be SAE 1010, 1111 or equivalent in accordance
with SAE AIR4127. These steels shall have a minimum ultimate shear strength of 41,000 p.s.i.
3.1.2 Corrosion - resisting steel. Unless otherwise specified (see 6.2), Type II clevis pins
shall be SAE 51416 or 51430F in accordance with SAE AIR4127. These steels shall have a
minimum ultimate shear strength of 67,000 p.s.i.
3.1.3 Brass. Unless otherwise specified (see 6.2), Type III clevis pins shall be UNS 36000
in accordance with ASTM B16/B16M or UNS 37700 in accordance with ASTM B124/B24M and
shall have a minimum ultimate shear strength of 40,000 p.s.i.
3.2 Hardness.
3.2.1 Type I. Type I clevis pins shall be cyanide hardened to Rockwell 30N 70 minimum to
a depth of .005 inch minimum.
3.2.2 Types II and III. Unless otherwise specified (see 6.2), Types II and III clevis pins shall
not be heat treated.
3.3 Protective finish.
3.3.1 Type I. Type I clevis pins shall be cadmium plated or zinc coated, as specified (see
6.2).
3.3.1.1 Cadmium plating. Cadmium plating shall be in accordance with Type II, Class 3 of
SAE AMS-QQ-P-416.
3.3.1.2 Zinc coating. Zinc coating shall be in accordance with Type II, Class Fe/Zn 5 of
ASTM B633.
3.3.2 Type II. Unless otherwise specified (see 6.2), Type II clevis pins shall be passivated
in accordance with SAE AMS2700.
3.3.3 Type III. Type III clevis pins shall be uncoated.
3.4 Shear. The shear strength of clevis pins shall be not less than the minimum shear
strength values specified in 3.1 or MS35810, as applicable.
3.5 Design and dimensions. Unless otherwise specified (see 6.2), the design and
dimensions of clevis pins shall be in accordance with MS35810. Unless otherwise specified,
dimensions and tolerances shall apply after plating or coating.
3.6 Marking. Trade marks or other markings may be applied to the pins, provided they do
not interfere with dimensions or the intended use of the pins.
3.7 Workmanship. Clevis pins shall be smooth, free from burrs, sharp edges, gouges,
porosity, cracks, scale, dirt or other defects which may adversely affect their intended use.
4. VERIFICATION
4.1 Conformance inspection. Conformance inspection shall include the following.
4.2 Inspection provisions.
4.2.1 Lot. A lot shall consist of clevis pins of the same type, finish and size, manufactured
from the same heat under the same conditions and offered for acceptance at one time.
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