National Stock Number (NSN) 4730-00-555-8203 (4730005558203) Parts List

Item Name	Nut Tube Coupling
Federal Supply Group (FSG)	Pipe Tubing Hose and Fittings
Federal Supply Class (FSC)	4730 Hose Pipe Tube Lubrication and Railing Fittings
National Item Identification Number (NIIN)	00-555-8203 (005558203)
NCB Code	USA (00)
Manufacturer	Wellman Group, Eaton Aeroquip Inc, Sae International, Designed Metal Connections Inc, Military Standards Corp, Triumph Aerostructures Llc, Dana Corp, S I Electronics Inc, Parker Hannifin Corporation, Finmeccanica Spa Helicopters, Alcoa Fastening Systems Ltd, Society Of Automotive Engineers Inc, Alcoa Global Fasteners Inc, Lockheed Martin Corporation

Part Number	Manufacturer	Item Name	Cage Code	RFQ
156 15	wellman group	nut tube coupling	k7018	RFQ
118-21600-230-4	eaton aeroquip inc	nut tube coupling	01276	RFQ
AS21921-4D	sae international	nut tube coupling	0u583	RFQ
118-21600-230-4	designed metal connections inc	nut tube coupling	14798	RFQ
MS21921D4	military standards corp	nut tube coupling	96906	RFQ
202-21600W4	triumph aerostructures llc	nut tube coupling	80378	RFQ
118-21600-230-4	dana corp	nut tube coupling	79470	RFQ
AS18280	sae international	nut tube coupling	0u583	RFQ
CVC4257W4	triumph aerostructures llc	nut tube coupling	80378	RFQ
DV600W4	s i electronics inc	nut tube coupling	17491	RFQ
2652291W4	parker hannifin corporation	nut tube coupling	92003	RFQ
137618257	finmeccanica spa helicopters	nut tube coupling	a0199	RFQ
VSF1212-4WW	alcoa fastening systems ltd	nut tube coupling	c4293	RFQ
AS18280	society of automotive engineers inc	nut tube coupling	81343	RFQ
VSF1212-4WW	alcoa global fasteners inc	nut tube coupling	92215	RFQ
AS21921	society of automotive engineers inc	nut tube coupling	81343	RFQ
MS21921-4D	sae international	nut tube coupling	0u583	RFQ
AS21921-4D	society of automotive engineers inc	nut tube coupling	81343	RFQ
ER817-4D	lockheed martin corporation	nut tube coupling	81755	RFQ
AS21921	sae international	nut tube coupling	0u583	RFQ
MS21921-4D	society of automotive engineers inc	nut tube coupling	81343	RFQ

MRC	Criteria	Characteristic
AAJD	THREAD CLASS	3B
AAJF	THREAD DIRECTION	RIGHT-HAND
ACTA	NUT STYLE	TUBE COUPLING
ADEA	NUT HEIGHT	0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM
AGAV	END ITEM IDENTIFICATION	AIRCRAFT APPLICATION,IROQUIS UH-1,CHINOOK CH-47 HELICOPTER,DELTA DART F-106,F-111. TOMCAT F-14A,STARLIFTER C-141 AIRCRAFT,E-3A AIRCRAFT WARNING AND CONTROL SYSTEM (AWACS)
ASDB	WIDTH ACROSS FLATS	0.562 INCHES NOMINAL
BRQL	LENGTH TO SHOULDER	0.537 INCHES MINIMUM AND 0.557 INCHES MAXIMUM
BSPX	SMALLEST INSIDE DIAMETER	0.300 INCHES MINIMUM AND 0.305 INCHES MAXIMUM
BZRR	THREAD SERIES	UNJF
CMLP	THREAD QUANTITY PER INCH	20
CQJX	NOMINAL THREAD SIZE	0.438 INCHES
CQRJ	NOMINAL TUBE OUTSIDE DIAMETER	0.250 INCHES
CRRB	SEAT ANGLE	45.00 DEGREES NOMINAL
CRTL	CRITICALITY CODE JUSTIFICATION	FEAT
FEAT	SPECIAL FEATURES	GRUMMAN AEROSPACE CORP A10 AIRCRAFT; WEAPON SYSTEM ESSENTIAL
MATT	MATERIAL	ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL
MDCL	MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-367,T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,T6,T62 OR T851 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SFTT	SURFACE TREATMENT	ANODIZE OVERALL
STDC	SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
ZZZK	SPECIFICATION/STANDARD DATA	96906-MS21921 GOVERNMENT STANDARD