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Page Title:
Table III. Strength requirements. |
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|  MIL-DTL-13220D
3.3.2 Zinc. Zinc plated in accordance with ASTM-B633, code letter Z.
3.3.3 Passivation. Passivate corrosion resistant steel in accordance with SAE AMS 2700,
code letter E.
3.4 Salt spray. When fittings are exposed to salt spray testing specified in 4.8 , the plating shall show
no corrosion products of zinc or basis metal corrosion products. The appearance of corrosion products
visible to the unaided eye at normal reading distance shall be cause for rejection, except white corrosion
products at the edges of the specimens shall not constitute a failure.
3.5 Strength. Strength requirements of the hooks shall be as shown in table III.
TABLE III. Strength requirements.
Hook
Safe working load - Pounds
wire rope diameter -
(metric)
Inches(metric/decimal)
(1.27cm/.05in )
3,300 (1497kg)
6/8 ( 1.91cm/.75in)
5,000 (2268kg)
(1.91cm/.75in )
8, 000 (3629kg)
7/8 and 1 (2.22cm/.87in )
15, 000 (6804kg)
3.6 Identification. The choker hooks shall bear the manufacturer's identification mark and hook size.
The identification shall be stamped, or applied by any other method of permanent marking, on the hooks
in a clearly visible location.
3.7 Workmanship. Workmanship shall conform to accepted commercial standard practice for this
type of equipment. Castings should be clean and high quality. There shall be no fins, spurs, scale,
extraneous material, cracks, porosity, sand, inclusions, blowholes, rough edges, or rough surfaces.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.2 Inspection conditions. Unless otherwise specified, all inspections shall be performed in
accordance with the applicable test procedures.
4.3 First article inspection. First article inspection, if not done by the manufacturer, shall be
performed at a laboratory acceptable to the procuring activity on sample units produced with equipment
and procedures used in production.
4.3.1 Samples for first article. Samples for first article shall be representative of the products
proposed to be furnished to this specification. Sampling shall be in accordance with 4.5.1.
4.3.2 First article inspection routine. All samples shall be subjected to first article testing in
accordance with table IV.
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