National Stock Number (NSN) 3040-01-033-2890 (3040010332890) Parts List

Item Name	Ring Piston
Federal Supply Group (FSG)	Mechanical Power Transmission Equipment
Federal Supply Class (FSC)	3040 Miscellaneous Power Transmission Equipment
National Item Identification Number (NIIN)	01-033-2890 (010332890)
NCB Code	USA (01)
Manufacturer	Double Seal Ring Co, Aviation Manufacturing Group Llc, Precision Rings Incorporated, Boeing Company The

Part Number	Manufacturer	Item Name	Cage Code	RFQ
DS8015-18	double seal ring co	ring piston	71975	RFQ
FR84-18	aviation manufacturing group llc	ring piston	84596	RFQ
J3-8019	precision rings incorporated	ring piston	99121	RFQ
ST7M342-18	boeing company the	ring piston	76301	RFQ

MRC	Criteria	Characteristic
ACXD	RING STYLE	CONCENTRIC
ACXF	RADIAL WALL THICKNESS	0.0440 INCHES NOMINAL
ACXJ	OVERALL WIDTH	0.0440 INCHES NOMINAL
ADTE	JOINT STYLE	VERTICAL/DIAGONAL JOINT
AGAV	END ITEM IDENTIFICATION	F-15 AIRCRAFT
FEAT	SPECIAL FEATURES	0.8450 IN. OD
MATT	MATERIAL	STEEL CORROSION RESISTING OVERALL
MDCL	MATERIAL DOCUMENT AND CLASSIFICATION	AMS5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SFTT	SURFACE TREATMENT	CHROMIUM OVERALL
STDC	SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL