Hexagon Head Cap Screw

2-170-5-05-901-11

(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
6	-	-	C

RNVC	SADC	MSDS	RNAAC
1	AF	-	ZZ

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

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

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
B1821BH031C150N	80204	E	-	5	2	-	KZ
FFS85	81348	4	-	5	9	-	KZ
9415819	24617	5	-	5	2	-	AZ
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