Close Tolerance Screw

51B222-40H

(NSN) National Stock Number

5305-00-005-5919

Federal Supply Classification

5305 Screws

Item Name Code

29294

Schedule B Code

7318152000

Summary

3a thread class, right-hand thread direction, 0.286 inches minimum and 0.363 inches maximum thread length, 2.801 inches minimum and 2.848 inches maximum fastener length, pan head style, 0.464 inches minimum and 0.488 inches maximum head diameter

DAC	HCC	DMIL	RNCC
5	-	-	C

RNVC	SADC	MSDS	RNAAC
1	9X	-	ZZ

Identification

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

INC	FIIG	Concept	Condition
29294	A003B0	-	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.

Thread Length

0.286 inches minimum and 0.363 inches maximum

Details

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

Fastener Length

2.801 inches minimum and 2.848 inches maximum

Details

The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.

Head Style

pan

Details

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

Head Diameter

0.464 inches minimum and 0.488 inches maximum

Details

The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

Head Height

0.133 inches minimum and 0.150 inches maximum

Details

A measurement from the bottom to the top of the head,in distinction from depth.

Grip Diameter

0.2485 inches minimum and 0.2495 inches maximum

Details

The length of a straight line which passes through the center of the grip,and terminates at the circumference.

Shank Unthreaded Hole Diameter

0.076 inches nominal first hole

Details

The length of a straight line which passes through the center of the shank unthreaded hole,and terminates at the inside circumference.

Internal Drive Style

offset cruciform (torque set)

Details

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

Nominal Thread Diameter

0.250 inches

Details

The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.

Grip Length

2.485 inches minimum and 2.515 inches maximum

Details

A measurement of the longest dimension of the grip,in distinction from width.

Thread Quantity Per Inch

Details

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

Minimum Tensile Strength

180000 pounds per square inch

Details

The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.

Distance From Head Largest Bearing Surface To Shank Hole Center

2.695 inches minimum first hole and 2.722 inches maximum first hole

Details

The distance from the shank hole centerline to the largest bearing surface of the head.

Surface Finish

32.0 microinches grip

Details

Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.

Material

steel comp 4140 overall or steel comp e4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall

Details

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

Material Document And Classification

mil-s-5626 mil spec 1st material response overall or mil-s-5000 mil spec 2nd material response overall or mil-s-8503 mil spec 3rd material response overall or mil-s-6098 mil spec 4th material response overall or mil-s-6049 mil spec 5th material response overall

Details

The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.

Surface Treatment

cadmium overall and chromate 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.

Surface Treatment Document And Classification

qq-p-416,ty 2,cl 2 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.

Thread Series Designator

unjf

Details

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

Specification/Standard Data

76823-51b222 manufacturers standard

Details

The document designator of the specification or standard which established the item of supply.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
51B222-40H	L4528	1	-	5	2	-	ZZ
51B222-40H	17446	1	-	5	2	-	ZZ
51B222-40H	06950	1	-	5	2	-	ZZ
51B222-40H	76823	1	-	3	9	-	SE
51B222-40H	06725	1	-	5	2	-	ZZ
51B222-40H	27624	1	-	5	2	-	ZZ
51B222-40H	73197	1	-	5	2	-	ZZ
51B222-40H	92215	1	-	5	2	-	ZZ
51B222-40H	97928	1	-	5	9	-	ZZ

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
-	713	Z	9

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Manufacturer

NORTHROP GRUMMAN TECHNICAL SERVICES, INC. DBA DEFENSE SYSTEMS SECTOR

CAGE: 0JRC1

MCLEAN , VA , 22102-7508

UNITED STATES

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FAQs

Frequently asked questions for NSN 5305-00-005-5919

What is the NIIN of the NSN 5305-00-005-5919?

The National Item Identification Number (NIIN) of the NSN 5305-00-005-5919 is 00-005-5919

When the NSN 5305-00-005-5919 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Fri, Jun 16, 1972

Does the NSN 5305-00-005-5919 contain any precious metals?

Type/content is unknown

Does the NSN 5305-00-005-5919 contain any hazardous material?

No data in HMIRS

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