National Stock Number (NSN) 1240-00-517-8640 (1240005178640) Parts List

Item Name	Retainer Optical El
Federal Supply Group (FSG)	Fire Control Equipment
Federal Supply Class (FSC)	1240 Optical Sighting And Ranging Equipment
National Item Identification Number (NIIN)	00-517-8640 (005178640)
NCB Code	USA (00)
Manufacturer	Macko Industries, Beta Engineering Inc, Delta X Corp, Freehold Manufacturing Assembly Co

Part Number	Manufacturer	Item Name	Cage Code	RFQ
5178640	macko industries	retainer optical el	1cn43	RFQ
5178640	beta engineering inc	retainer optical element	33436	RFQ
5178640	delta x corp	retainer optical element	33950	RFQ
5178640	freehold manufacturing assembly co	retainer optical el	2s308	RFQ

MRC	Criteria	Characteristic
ABHP	Overall Length	0.100 INCHES NOMINAL
AATX	Shoulder Length	0.062 INCHES NOMINAL
AATN	Shoulder Diameter	0.562 INCHES NOMINAL
BMTT	Setscrew Notch	NOT PROVIDED
BMTQ	Guide Design	THREAD CHAMFER
BMTS	Internal Annular Serration	PROVIDED
STYL	Style Designator	SHOULDERED
MRC	Decoded Requirement	Clear Text Reply
MATT	Material	COPPER ALLOY 360
ABKK	Flange Diameter	0.625 INCHES NOMINAL
AGAV	End Item Identification	USED 1015-00-322-9752
MDCL	Material Document And Classification	QQ-B-626, COMP 360 FED SPEC SINGLE MATERIAL RESPONSE