Aircraft General Standards (AGS) were issued by the Directorate of Technical Development of the Air Ministry from the 1920’s and persist till today through substitutions to British Standards and AGS revisions. They relate to fasteners  such as bolts, nuts, rivets, fork joints, taper pins, common to all types of aircraft. AGS fasteners are made in a range of sizes and different materials. In their identification system AGS parts are listed in sequential number, eg AGS 500, AGS 501 even though the number does not generally group common parts together nor does it follow a specific chronological order. Special parts made for specific aircraft have no marking to indicate size or material, but are marked with a part number.

Anchor nuts (aka nut plates) are designed for blind mounted applications where it is impractical to use hex nuts. Stiffnuts, in particular, feature a very high friction between the threads of the nut and the bolt so that the nut may be considered self-locking. Several types of stiffnuts have been designed for use on aircraft. AGS 2007 series relates to double lug anchor locking nuts (aka thick stiffnuts) while  those in AGS 2008 and 2009 series relate to thin and countersunk stiffnuts.

AGS 2007 series anchor nuts are offered as nyloc (*) (with nylon-insert) or all-metal style. They can be furnished in different materials (aluminum, cadmium plated steel or corrosion resistant steel (CRES). Available with BA or BSF (**) threads as NEW OLD STOCK (NOS) items in limited quantities from  stocks of our co-operating suppliers as special order non refundable and non-returnable items.

(*) Nyloc nut (aka nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut) is a kind of locknut with a nylon collar that increases friction on the screw thread.

(**) British Association (BA) Threads. small sized screw threads still used in some precision instruments, such as optics and moving-coil meters, relays as well as modelling applications. Recommended by the British Standards Institution for use instead of the smaller British Standard Whitworth (BSW) and British Standard Fine (BSF) thread screws (those below 1⁄4 inch).

British Standard Fine (BSF) Threads. Screw thread form, used as a fine-pitch alternative to British Standard Whitworth (BSW) threads. Common applications include British machine tool industry and cars. Superseded by the American UNF threads and later Metric standards.