Hexagon Head Cap Screw

9417950

(NSN) National Stock Number

5305-00-226-4825

Federal Supply Classification

5305 Screws

Item Name Code

18257

Schedule B Code

7318152000

Summary

2a thread class, right-hand thread direction, 0.580 inches minimum and 0.750 inches maximum thread length, 0.719 inches minimum and 0.750 inches maximum fastener length, hexagon head style, 0.195 inches minimum and 0.211 inches maximum head height

DAC	HCC	DMIL	RNCC
5	-	-	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

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

0.580 inches minimum and 0.750 inches maximum

Details

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

Fastener Length

0.719 inches minimum and 0.750 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

rg-33 auv mrap; medium mine protected vehicle - mmpv; multiple launch rocket system (mlrs)

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.

Criticality Code Justification

feat

Details

The master requirement codes of those requirements which are technically critical by reason of tolerance,fit,performance,or other characteristics which affect identification of the item.

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.

Special Features

weapon system essential

Details

Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification on one or more other functions.

Material

steel overall

Details

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

Material Document And Classification

sae j429,gr 8 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.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
Y00016627	FAFH7	4	-	5	2	-	ZF
18257-132	D2638	5	-	5	2	-	ZG
1020Z4858	D9182	6	-	C	1	-	ZZ
179816	D9182	6	-	C	1	-	ZZ
99121928	D9182	6	-	C	1	-	ZZ
C-10-25299	D9182	6	-	C	1	-	ZZ
S-256	D9182	6	-	C	1	-	ZZ
S1617	D9182	6	-	C	1	-	ZZ
5306002258497	A00AM	9	-	6	9	-	YP
5306002264825	A00AM	9	-	6	9	-	YP
53062264825	A00AM	9	-	6	9	-	YP
5306PL1494991	9009H	9	-	6	9	-	WP
993668C	7041B	3	-	5	2	-	YB
0702062	S3002	3	-	5	2	-	YB
B1821BH031C075N	80204	E	-	5	9	-	KZ
B1831BH031C075N	80204	5	-	5	9	-	ZZ
122007	80195	6	-	C	1	-	ZZ
179816	72915	6	-	C	1	-	ZZ
25228R1	29510	5	-	5	9	-	ZZ
YE122007	03240	5	-	C	1	-	KZ
9424877	24617	A	-	5	2	-	KZ
23502876	72582	5	-	5	2	-	ZZ
G1921	01417	2	-	D	9	-	9Z
G1921BH031C075N	01417	E	-	5	1	-	9Z
9419787	7X677	5	-	5	2	-	KZ
9417950	11862	5	-	5	9	-	KZ
9419787	11862	5	-	5	9	-	KZ
1-03-1108-3	19272	5	-	5	9	-	AJ
1-03-1112-3	19272	5	-	5	9	-	AJ
AES01C312750AZ0A81	05047	E	-	3	2	-	ZZ
9117M16P14	07482	6	-	C	1	-	ZZ
1190	58864	4	-	5	9	-	KZ
1190	0EJ14	4	-	5	2	-	KZ
DDE 00179816	64678	5	-	5	2	-	ZZ
18257-132	21439	5	-	5	9	-	KZ
43769AX	45152	5	-	C	1	-	ZZ
43796AX	45152	6	-	5	9	-	ZZ
43796AX	75Q65	5	-	5	2	-	ZZ
MS90725-32	96906	E	-	5	9	-	KZ
MS90728-32	96906	4	-	5	9	-	KZ
9417950	17769	5	-	5	9	-	KZ