A-A-1927D
suitable for the performance of the Inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements.
4.2 Lot. All padlocks of the same type, size, shackle, keying, and case offered for delivery at one time shall be considered a lot for purposes of inspection.
4.3 Sampling for quality conformance examination. A random sample of padlocks shall be selected from each lot in accordance with MIL-STD-105 (Sampling Procedures and Tables For Inspection By Attributes) inspection level S-2, AQL 6.5 expressed in terms of percent defective. The sample unit shall be one padlock.
4.4 Visual and dimensional examination. The sample padlocks shall be visually and dimensionally examined to verify compliance with this description. Tolerance limits specified are absolute limits as defined in ASTM E29 (Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications).
4.5 Testing. Testing of the sample padlocks shall be performed in accordance with all tests of ASTM F883 for Type PO 1 Option A (key operated padlocks) (captive key when unlocked) grade 2 (except for tensile strength) except that master, grand master, and keyed alike surreptitious entry testing shall be performed at grade 1 (except for tensile strength) requirements (individually keyed padlocks shall be tested at grade 2 (except for tensile strength) requirements). Padlocks shall resist a tensile force of 800 pound-force (lbf) (3559 Newton (N)) for size A, 2,000 lbf (8896 N) for sizes B and C. The hardened materials for type I case shall be checked for hardness in accordance with ASTM E18. The hardness test shall be conducted on a surface at a point 1/2 inch (12.7 mm) minimum from an end or edge. The key shall not be removable from the unlocked padlock. Each lot of individually keyed padlocks shall be checked for this requirement. Each master keyed group or grand master keyed set shall be checked to verify that only the master or grand master key will operate more than one padlock within the group or set as applicable.
4.6 Certification of test requirements. When specified on the contract or purchase order, a certificate of conformance may be furnished in lieu of actual testing on a lot by lot basis providing that:
a. Objective evidence dated not more than 2 years prior to the date of the start of the contract or date of the purchase order is available for review, that those tests specified in the industry standards referenced herein have been performed by a test facility acceptable to the Government and that the product tested conformed with stated requirements .
b. The product being offered has been manufactured by the same manufacturer, using the same material, processes and manufacturing techniques as the product tested.
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