A-A-2564 Bar, Pinch (Offset)This commercial item description covers offset pinch bars.

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Identification marking. Each pinch bar shall be stamped or etched in a permanent and legible manner with the manufacturer’s name or identifying symbol of such known character that the source may be readily identifiable, part number and country of origin.

Workmanship. All drills shall be free from imperfections which may affect their safety, appearance, serviceability, durability.

QUALITY ASSURANCE PROVISIONS

Sampling for inspection. Sampling shall be in accordance with MIL-STD-105, Sampling Procedures and Tables for Inspection by Attributes, except where otherwise specified herein. The lot size shall consist of all bars offered for acceptance at one time. The sample unit is one pinch bar.

Visual inspection. Each bar from the sample lot shall be examined for workmanship and marking requirements. The inspection level shall be I with an acceptable quality level (AQL) of 2.5 defects per hundred units.

Dimensional inspection. Each bar from the sample lot shall be examined for dimensional requirements. The inspection level shall be I with an acceptable quality level (AQL) of 2.5 defects per hundred units.
 
Testing of end item. The inspection level shall be S-3 with an acceptable quality level (AQL) of 4.0 percent defective.

Hardness test. Hardness test shall be in accordance with ASTM E18 or ASTM E18. The impressions shall be taken 1/2 inch from the end tested. The manufacturer shall certify that both the cutting edge end the taper and have similarity hardened.

Physical test. The sample pinch bars shall be subjected to the following tests: The entire offset end of the bar (dimension A, table I) shall ne rigidly secured by a vise or clamp and the test load specified in table I shall be applied to the body 2 inches from the tapered end in a direction perpendicular to the body. The manner of applying the load shall be such as to straighten the offset. After applying the load, the pinch bar shall not take permanent set nor shall the offset end fracture when so tested. Three inches of the tapered end shall be clamped and the bar shall be subjected to the same test except that the load applied shall be one-third the test load for the offset end.

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

Preservation, packaging, packing, labeling, and marking. Preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order.