Hexagon Self-Locking Nut

B4524-321-16

(NSN) National Stock Number

5310-00-208-1919

Federal Supply Classification

5310 Nuts and Washers

Item Name Code

05277

Schedule B Code

7318160000

Summary

3b thread class, right-hand thread direction, prevailing torque with nonmetallic insert locking feature, hexagon nut style, 0.312 inches minimum and 0.328 inches maximum nut height, 0.428 inches minimum and 0.440 inches maximum width across flats

DAC	HCC	DMIL	RNCC
1	-	-	5

RNVC	SADC	MSDS	RNAAC
1	-	-	PA

Identification

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes:nut (1), self-locking, cap.

INC	FIIG	Concept	Condition
05277	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 with nonmetallic insert

Details

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

Nut Style

hexagon

Details

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

Nut Height

0.312 inches minimum and 0.328 inches maximum

Details

None.

Width Across Flats

0.428 inches minimum and 0.440 inches maximum

Details

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

Temp Rating

250.0 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

unc

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

0.250 inches

Details

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

Bearing Surface Type

chamfered or washer faced

Details

Indicates the type of bearing surface.

Material

plastic polyamide locking insert

Details

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

Material

steel nut

Details

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

Surface Treatment

cadmium overall except insert

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.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
42NE040	13257	5	-	5	1	-	XX
C520025C000	D9182	6	-	C	1	-	ZZ
C521025C000	D9182	6	-	C	1	-	ZZ
C720025C000	D9182	6	-	C	1	-	ZZ
5310PL0780072	9009H	9	-	6	9	-	WP
5310PL1446877	9009H	9	-	6	9	-	WP
22NE040	019L2	5	-	5	1	-	ZZ
42NE040	019L2	5	-	5	1	-	ZZ
17D1	12603	2	-	5	9	-	KZ
54955	94833	5	-	5	9	-	PA
203MR47P2	04164	5	-	5	1	-	XX
203MR047P002	05030	5	-	5	9	-	XX
SM-D-475754-2	80063	E	-	5	1	-	KZ
3029-01004-04	75418	5	-	5	1	-	CT
54955	5RQL2	5	-	5	1	-	ZZ
D21061-26	0BXF1	1	-	C	1	-	ZZ
22NE040	72962	5	-	5	9	-	ZZ
42NE040	72962	5	-	5	9	-	ZZ
D21061-26	07860	1	-	5	9	-	KZ
21C1581-13	07482	5	-	5	1	-	KE
17D1	77237	5	-	5	1	-	ZZ
1273	13841	4	-	5	1	-	SE
12Z2007-383	94135	5	-	5	9	-	XX
A1-10730D1	14850	2	-	5	1	-	KZ
A1-10779D1	14850	2	-	5	1	-	KZ
203M0047P002	3B150	5	-	5	1	-	HD
5274-146	96214	5	-	5	9	-	XX
203-1011P56	49956	5	-	5	1	-	XX
203M0047P002	49956	5	-	5	9	-	HD
203MR47P2	49956	5	-	5	1	-	XX
802482-00	32345	2	-	5	9	-	XB
810729-00	32345	2	-	5	9	-	XB
AN365-420A	88044	E	-	2	2	-	XX