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FF-S-111 Revision D, August 27, 1974
Complete Document
Active, Most Current
Includes all amendments and changes through Validation Notice 2, October 8, 2013
Additional Comments: INACTIVE FOR NEW DESIGN
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This specification covers single and double-threaded wood screws with round, flat countersunk and oval countersunk heads having slotted or cross-recessed drives.

Wood screws shall be of the following types and styles (see 6.1).
            I  - Single thread
            II - Double thread

            1s - Round head, slotted drive.
            1c - Round head, cross-recessed drive.
            2s - Flat countersunk head, slotted drive.
            2c - Flat countersunk head, cross-recessed drive.
            6s - Oval countersunk head, slotted drive.
            6c - Oval countersunk head, cross-recessed drive.

Wood screws shall be of the sizes specified in the applicable Military Standard (MS) and ANSI B18.6.1.