Close Tolerance Bolt

3020228CL2

3020228CL2
(NSN) National Stock Number
5306-00-172-6921
Federal Supply Classification
5306 Bolts
Item Name Code
27851
Schedule B Code
7318152000
Summary

3a thread class, right-hand thread direction, 0.695 inches minimum and 0.715 inches maximum thread length, 2.365 inches minimum and 2.385 inches maximum fastener length, double hexagon extended washer head style, 0.412 inches minimum and 0.432 inches maximum head height

DAC HCC DMIL RNCC
5 - - 3
RNVC SADC MSDS RNAAC
2 - - KE
Identification

An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

INC FIIG Concept Condition
27851 A003B0 - 1
Specifications
Thread Class
3a
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
0.695 inches minimum and 0.715 inches maximum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
2.365 inches minimum and 2.385 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
double hexagon extended washer
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
Head Height
0.412 inches minimum and 0.432 inches maximum
Details A measurement from the bottom to the top of the head,in distinction from depth.
Width Between Flats
0.491 inches nominal
Details None.
Extended Washer Diameter
0.552 inches minimum and 0.572 inches maximum
Details None.
Extended Washer Thickness
0.090 inches minimum and 0.100 inches maximum
Details None.
Grip Diameter
0.3748 inches minimum and 0.3750 inches maximum
Details The length of a straight line which passes through the center of the grip,and terminates at the circumference.
Nominal Thread Diameter
0.375 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
1.587 inches minimum and 1.670 inches maximum
Details A measurement of the longest dimension of the grip,in distinction from width.
Thread Quantity Per Inch
24
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Surface Finish
32.0 microinches bearing surface of head
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
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
iron alloy 660 overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
ams 5731 assn std single 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 head
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
cadmium threads
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
ams 2400 assn std single treatment response head
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.
Surface Treatment Document And Classification
ams 2400 assn std single treatment response threads
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.
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
- 671 Z 9

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Manufacturer
PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP.
CAGE: 00198
LONGUEUIL , QC , J4G 1A1
CANADA
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FAQs
Frequently asked questions for NSN 5306-00-172-6921
What is the NIIN of the NSN 5306-00-172-6921?
The National Item Identification Number (NIIN) of the NSN 5306-00-172-6921 is 00-172-6921
When the NSN 5306-00-172-6921 was assigned to the Federal Catalog?
It was assigned 53 years ago, on Sat, Nov 20, 1971
Does the NSN 5306-00-172-6921 contain any precious metals?
Type/content is unknown
Does the NSN 5306-00-172-6921 contain any hazardous material?
No data in HMIRS

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