Double Hexagon Self-Locking Nut

3M221-8

(NSN) National Stock Number

5310-00-866-5335

Federal Supply Classification

5310 Nuts and Washers

Item Name Code

05276

Schedule B Code

7318160000

Summary

3b thread class, right-hand thread direction, prevailing torque all metal design locking feature, dry film lubricant lubrication, double hexagon nut style, 0.578 inches maximum nut height

DAC	HCC	DMIL	RNCC
5	-	-	5

RNVC	SADC	MSDS	RNAAC
9	-	-	XX

Identification

A nut having 12 drive points and 24 sides. The bearing surface may be washer faced. An integral locking feature is incorporated in the design of the head or in the threads.

INC	FIIG	Concept	Condition
05276	A021A0	1	1

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.

Locking Feature

prevailing torque all metal design

Details

An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.

Lubrication

dry film lubricant

Details

A substance designed to provide a reduction of friction between the two surfaces in contact.

Nut Style

double hexagon

Details

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

Nut Height

0.578 inches maximum

Details

None.

Width Across Flats

0.553 inches minimum and 0.565 inches maximum

Details

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

Temp Rating

500.0 deg fahrenheit nominal

Details

A value which expresses the degree of heat or cold as applied to the operation,or limitation of operation,of an item.

Thread Series

unf

Details

A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.

Thread Quantity Per Inch

Details

The number of threads on the item per linear inch measured on a line parallel to the thread axis.

Nominal Thread Size

0.500 inches

Details

A designation that is used for the purpose of general identification of the thread.

Countersink Angle

109.5 degrees minimum and 110.5 degrees maximum nut

Details

The included angle of the countersink.

Bearing Surface Type

flat

Details

Indicates the type of bearing surface.

Material

steel overall

Details

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

Surface Treatment

cadmium overall

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.

Special Test Features

100% mpi inspection

Details

Test conditions and ratings,or environmental and performance requirements that are different,more critical,or more specific than those specified in a governing test data document.

Surface Treatment Document And Classification

qq-p-416,ty 1,cl 3 fed spec single treatment response overall

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.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
LH3393-080	A0170	5	-	5	2	-	ZR
H23-8	15653	5	-	5	9	-	ZZ
FN22-820	80539	5	-	5	9	-	TU
SS5089-08	78286	A	-	3	2	-	KZ
3M221-8	56878	5	-	5	9	-	ZZ
FN22MG-820	56878	5	-	5	2	-	ZZ
LH3393-080	56878	3	-	5	9	-	9Z

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.

Genuine Manufacturers Parts
100% Product Inspection
7 Year Sales Record Retention
Fast On-Time Delivery
HAZMAT Certified
Global Shipping

Manufacturer

THE BOEING COMPANY DIV DEFENSE

CAGE: 76301

SAINT LOUIS , MO , 63134-1939

UNITED STATES

View Products

FAQs

Frequently asked questions for NSN 5310-00-866-5335

What is the NIIN of the NSN 5310-00-866-5335?

The National Item Identification Number (NIIN) of the NSN 5310-00-866-5335 is 00-866-5335

When the NSN 5310-00-866-5335 was assigned to the Federal Catalog?

It was assigned 61 years ago, on Tue, Jan 1, 1963

Does the NSN 5310-00-866-5335 contain any precious metals?

Type/content is unknown

Does the NSN 5310-00-866-5335 contain any hazardous material?

No data in HMIRS

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.