MIL-STD-1660 Ammunition Unit LoadsThis standard establishes minimum design criteria and associated tests for ammunition unit loads.

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MIL-STD-1660A

4.8.3  Pallets.  Whenever practicable, and consistent with satisfying the other design and performance criteria of this standard, unit loads shall be designed to use Army pallets DA PAM 746-1, standard wood pallets, and standard steel pallets, MIL-P-23312 Style 1A (35 by 45½) and MIL-P-23312 Mk 3 Mod 0 (40 by 48) in accordance with Drawing 564200 or Mk 12 Mod 0 or 1 (35 by 45½) in accordance with Drawing 2086479 or 2645217, respectively. Unit loads designed to use standard steel pallets do not require the pushing and towing test, specified by 5.4.6, to be performed during qualification of the unit load.  Special purpose pallets shall be used only when they are cost- effective on a life cycle basis.

4.8.4  Nails.  Nails shall be in accordance with ASTM F1667 common steel nail (NLCMS or NLCMMS) of the style and size appropriate to the width and thickness of wood members being joined.

4.8.5  Staples.  Staples shall be in accordance with ASTM F1667; STFCS-189 or STFCS-207, (15/16-inch or

1-inch crown width by %-inch leg length) for %-inch strapping, Type IV, Style 3 and 117/32-inch crown width by

%-inch leg length for 11/4-inch strapping.  For FIULs, only use staples if necessary.  Staples are a known source of foreign object damage/debris (FOD) for jet aircraft engines.

4.8.6  Edge protectors.  Edge protectors of a size appropriate for the strapping shall be used when specified by design activity (see 6.2).

4.8.7  Wood members.  Lumber, in accordance with the quality requirements of ASTM D6199, shall be used as appropriate for all structural members.  Non-structural members may be fabricated from lumber in accordance with either ASTM D6199 or Voluntary Product Standard PS 20, whichever is cost effective.  Wood shall meet the guidelines of ISPM No. 15 and be marked in accordance with the document.

4.8.8  Plywood.  Plywood shall be commercial Grade C-D with exterior glue.

4.9  Markings.  Important markings or inspection data on the items shall not be concealed by the unit load members.  Provisions shall be made or space allocated for attaching hazard marking placards to unit loads.  For guidance for markings on Army ammunition unit loads, see DAC Drawing ACV00561.

4.10  FIULs (Navy), tactical (Army).  All materials used to make up FIULs shall be nonflammable, with the exception of lumber items that may be used to construct the load (e.g., spacers or battens).  Metal parts shall be suitably protected from corrosion.

4.10.1  Sling compatibility.  FIULs shall be capable of being safely handled by the authorized slings commonly used in dockside stevedoring operations and at sea connected replenishment (CONREP) and vertical replenishment (VERTREP) operations as cited below.  The following slings are currently authorized for use in Department of the Army and Navy handling operations:

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