A-A-50212 Parallel Rulers, Folding TypeThis description covers stepping or folding parallel rulers used in general drafting and navigation to draw and lay out parallel lines.

Pages 1 - 2 - 3 - 4 - 5

A-A-50212A

Size. The rulers shall be furnished in the following sizes:

Bars. Metal or plastic. Ruler sized 6 through 18 shall have two bars. Rulers size 24 shall have three bars.

Friction pads. One pad attached to the underside of each blade near each end. On ruler sizes 12 through 24, and additional pad attached near the center of each blade.

Accuracy. When the instrument is in working position, the blades shall remain true to their common plane, and the ruling edge of both blades shall be parallel within 0.01 inch per foot of length at all positions.

Regulatory requirements. The offeror/contractor is encouraged to use recovered materials in accordance with Public Law 94-580 to the maximum extent practicable.

Packaging and packing. Military packaging shall be specified when shipments are to overseas Department of Defense (DoD) consignees. Commercial packaging may be specified for shipments to DoD consignees within the Continental United States and to non-DoD consignees worldwide. When a supplier’s normal packaging will satisfy the requirements for military packaging, it may be used.

Military packaging. Each parallel ruler shall be preserved and packed to protect against physical damage deterioration in a logistic environment characterized by the following:

1. Multiple handling during transportation and in-transit storage.

2. Shock, vibration, and static loading forces during worldwide shipment by all transport modes.

3. Uncontrolled warehouse storage for extended periods.

4. Weather exposure during shipment and in-transit transfers.

5. Stacking loads during shipment and storage.

Quantities of parallel rulers of one class and size destined to a single addressee may be unitized into one or more unit loads.