Hexagon Head Cap Screw

B1821BH031C150N

(NSN) National Stock Number
5305-00-226-4831
Federal Supply Classification
5305 Screws
Item Name Code
18257
Schedule B Code
7318152000
Summary

2a thread class, right-hand thread direction, 0.875 inches minimum and 1.062 inches maximum thread length, 1.438 inches minimum and 1.500 inches maximum fastener length, hexagon head style, 0.195 inches minimum and 0.211 inches maximum head height

DAC HCC DMIL RNCC
E - - 5
RNVC SADC MSDS RNAAC
2 - - KZ
Identification

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

INC FIIG Concept Condition
18257 A003B0 - 1
Specifications
Thread Class
2a
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
0.875 inches minimum and 1.062 inches maximum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
1.438 inches minimum and 1.500 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
hexagon
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
Head Height
0.195 inches minimum and 0.211 inches maximum
Details A measurement from the bottom to the top of the head,in distinction from depth.
Width Between Flats
0.489 inches minimum and 0.500 inches maximum
Details None.
End Item Identification
mrap buffalo mk2a2; mrap - cougar cat1 a2; medium mine protected vehicle - mmpv
Details The national stock number or the identification information of the end equipment for which the item is a part.
Nominal Thread Diameter
0.312 inches
Details The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
Features Provided
finished head
Details Those features,not otherwise specified,which may be required for proper functioning of the item.
Thread Quantity Per Inch
18
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Minimum Tensile Strength
150000 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.
Hardness Rating
32.0 rockwell c minimum and 38.0 rockwell c maximum overall
Details A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
Surface Finish
63.0 microinches threads
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Material
steel overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
sae j429 grade 8 assn std single material response or astm a354 grade bd 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
zinc 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
astm b633 ty 2 sc 3 assn std 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
unc
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.
Nondefinitive Spec/Std Data
2 type and 10p style and 8 grade
Details The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
12Z24-24 D9182 6 - C 1 - ZZ
180083 D9182 6 - C 1 - ZZ
3176210-A-049 D9182 6 - C 1 - ZZ
411375 D9182 6 - C 1 - ZZ
5306-226-4831 A00AM 9 - 6 9 - YP
5306002264831 A00AM 9 - 6 9 - YP
5305PL0790297 9009H 9 - 6 9 - WP
227777 T0720 6 - 8 2 - ZN
FFS85 81348 4 - 5 9 - KZ
9415819 24617 5 - 5 2 - AZ
2-170-5-05-901-11 6LE50 6 - C 1 - ZZ
AES01C312A50AW9A91 05047 E - 3 2 - ZZ
2-170-5-05-901-11 51900 6 - C 1 - ZZ
197-115 72741 5 - 5 2 - KZ
179822 79410 5 - 5 9 - KZ
M2001BM 61208 A - C 1 - ZZ
11KP390 45152 3 - 5 9 - ZZ
11KP390 75Q65 3 - 5 2 - ZZ
MS90728-38 96906 4 - 5 9 - KZ
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N A - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
48950 - W -
RVC WCC TCC SHC
- 573 Z 9

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Manufacturer
AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE
CAGE: 80204
WASHINGTON , DC , 20036-3804
UNITED STATES
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FAQs
Frequently asked questions for NSN 5305-00-226-4831
What is the NIIN of the NSN 5305-00-226-4831?
The National Item Identification Number (NIIN) of the NSN 5305-00-226-4831 is 00-226-4831
When the NSN 5305-00-226-4831 was assigned to the Federal Catalog?
It was assigned 61 years ago, on Tue, Jan 1, 1963
Does the NSN 5305-00-226-4831 contain any precious metals?
Does not contain precious metal
Does the NSN 5305-00-226-4831 contain any hazardous material?
No data in HMIRS

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