FF-P-110 Padlock, Changeable Combination \(Resistant To Opening By Manipulation And Surreptitious Attack\)This specification covers changeable combination padlocks designed to conform to the standards for security equipment as set forth in the "National Security Council Directive Governing the Classification, Downgrading, Declassification and Safeguarding of National Security Information". The padlocks are required to resist opening by manipulation and surreptitious techniques for the period of time specified. The padlocks are intended for use as indicated in 6.1. The padlocks are not tested for forced opening.

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FF-P-110J

distort and visibly mark the padlock and prevent the reattachment of the components. It shall not

be possible to release the shackle by tension applied between the padlock shackle and case,

without completely impairing the lock to an inoperable condition. The padlock shall be designed

and constructed so that it cannot be opened by manipulation or surreptitious attack for a period

specified in 3.8.

3.6 Dimensions. The outside dimensions across the shackle shall be of 1.5 inches

�0.125-inch (38.1 millimeters (mm) �3.175 mm) and the space under the shackle shall be of

sufficient size to fasten around a 0.75-inch (19.05 mm) diameter bar. The diameter of the shackle

shall be 0.31-inch -0.00, +0.02-inch (7.938 mm -0.00, +0.55 mm). The length of the padlock,

when locked, shall be 4.375 inches (111.125 mm) maximum. The width or thickness shall not

exceed 2.75 inches (69.85 mm).

3.7 Dial face markings. The dial face shall have not less than 50 depressed graduation marks.

The marks and identifying numbers shall be made clearly visible and legible for running the

combination setting.

3.8 Tamper resistance. Class 1 and 2 padlocks shall resist opening for not less than

30 man-minutes by manipulation and 10 man-minutes by surreptitious attack.

3.9 Resistance to radiographic techniques. The class 1 padlock shall provide resistance to

radiographic techniques for not less than 30 minutes.

3.9.1 Radiographic protection. Radiographic protection for the class 1 padlock may be provided

by the composition of the materials from which its components are constructed, or may be

provided by the addition of a shielding cover.

3.10 Combination change device. A key or other suitable device for changing the combination

shall be furnished with each padlock. The change device, if a key, shall be combinated to the

series of padlocks the producer shall furnish and shall be prominently and permanently marked

with a designation of the manufacturer's padlock series. The change device shall be of corrosion-

resistant material or have a corrosion-resistant finish.

3.11 Lubrication. All moving parts of the padlock mechanism shall operate smoothly and quietly.

A lubricant normally employed by the manufacturer for padlocks may be used. The bearing

surface of the mechanism shall not show gummy deposits or wear sufficient to interfere with its

operation after 5,000 cycles (minimum) of actual or simulated locking and unlocking and

50 (minimum) actual or simulated changes of the combination.

3.12 Finish. All parts of the padlock, other than those of noncorrosive materials, shall be

protected against corrosion by electroplating or other effective methods. The shackle, if of steel,

shall have an electroplated nickel finish.

3.13 Marking and serialization.