Packing Nut

MS21937-4H

(NSN) National Stock Number

4730-00-684-0564

Federal Supply Classification

4730 Hose, Pipe, Tube, Lubrication and Railing Fittings

Item Name Code

18028

Schedule B Code

Summary

3b thread class, right-hand thread direction, 0.344 inches nominal thread length, not casehardened casehardening indicator, 0.500 inches nominal overall length, 7/16in-20 thread size

DAC	HCC	DMIL	RNCC
3	-	-	5

RNVC	SADC	MSDS	RNAAC
9	-	-	AX

Identification

An item having internal and/or external machine thread(s) (threads other than pipe or hose series), specifically designed to retain, by means or groove(s), shoulder(s), and the like, packing and/or a packing gland within a stuffing box. See also bushing, machine thread; inverted nut, tube coupling; and nut, tube coupling. Excludes:packing nut, stuffing tube; and use with electrical cable, and locknut, pipe.

INC	FIIG	Concept	Condition
18028	T385-E	-	2

Specifications

Thread Class

Details

A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

Thread Direction

right-hand

Details

The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.

Thread Length

0.344 inches nominal

Details

A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.

Casehardening Indicator

not casehardened

Details

Indicates whether or not a ferrous alloy object has been subjected to a process whereby the outer portion is made substantially harder than the inner portion or core.

Overall Length

0.500 inches nominal

Details

The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.

Thread Size

7/16in-20

Details

Designates the thread diameter and number of threads per specific measurement scale.

Unthreaded Portion Length

0.156 inches nominal

Details

None.

Largest Inside Diameter

0.875 inches nominal

Details

None.

Screw Thread Series Designator

unjf

Details

A designation distinguishing one group of screw thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

Width Across Flats

1.000 inches nominal

Details

The shortest straight line between flats,perpendicular to the height.

Screw Thread Location

internal

Details

Indicates the location of the screw thread.

Length To Shoulder

0.344 inches nominal

Details

None.

Major Unthreaded Outside Diameter

1.000 inches nominal

Details

None.

Material

aluminum alloy 2014

Details

The chemical compound or mechanical mixture properties of which the item is fabricated.

Surface Treatment

anodize

Details

The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

Surface Treatment Document And Classification

mil-a-8625,type 2,class 1 mil spec single treatment response

Details

The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.

Style Designator

hexagon, internal thread, shouldered

Details

The style designation indicating the configuration that most nearly corresponds to the appearance of the item.

Test Data Document

81349-mil-f-18280c specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.).

Details

The specification,standard,drawing,or similar instrument that specifies environmental and performance requirements or test conditions under which an item is tested and establishes acceptable limits within which the item must conform identified by an alphabetic and/or numeric reference number. includes the commercial and government entity (cage) code of the entity controlling the instrument.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
MS21937-4H	14397	E	-	5	9	-	AX
MS21937-4H	03647	3	-	5	9	-	AX
MS21937-4H	00624	E	-	5	9	-	AX
MS21937-4H	45681	3	-	5	9	-	AX
105-01584	79470	3	-	5	9	-	AX
MS21937-4H	79470	E	-	5	9	-	AX
AS18280	0U583	E	-	5	9	-	ZZ
AS21937	0U583	E	-	5	9	-	ZZ
MS21937W4H	0U583	E	-	3	2	-	ZZ
SAE-AS18280	0U583	E	-	3	1	-	ZZ
AS18280	81343	E	-	5	9	-	ZZ
AS21937	81343	E	-	5	9	-	ZZ
MS21937-4H	81343	E	-	5	9	-	ZZ
MS21937W4H	81343	E	-	5	9	-	ZZ
MS21937-4H	96906	E	-	5	9	-	AX
MS21937-4HC	96906	E	-	5	9	-	AX

Material and Special Handling

Hazardous material, precious metals, criticality, and electrostatic discharge indicators.

HMIC	PMIC	ESD/EMI	Criticality
N	U	-	-

Freight

Universal / National Freight and Handling Information

UFC	HMC	LTL	LCL
48950	-	W	-

RVC	WCC	TCC	SHC
-	573	Z	9

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

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HAZMAT Certified
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Manufacturer

PARKER HANNIFIN CORP STRATOFLEX DIV AIRCRAFT FITTINGS OPN

CAGE: 50948

FORT WORTH , TX , 76114-0398

UNITED STATES

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FAQs

Frequently asked questions for NSN 4730-00-684-0564

What is the NIIN of the NSN 4730-00-684-0564?

The National Item Identification Number (NIIN) of the NSN 4730-00-684-0564 is 00-684-0564

When the NSN 4730-00-684-0564 was assigned to the Federal Catalog?

It was assigned 62 years ago, on Tue, Jan 1, 1963

Does the NSN 4730-00-684-0564 contain any precious metals?

Type/content is unknown

Does the NSN 4730-00-684-0564 contain any hazardous material?

No data in HMIRS

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