Hexagon Head Cap Screw

M1256

(NSN) National Stock Number

5305-00-011-2593

Federal Supply Classification

5305 Screws

Item Name Code

18257

Schedule B Code

7318152000

Summary

2a thread class, right-hand thread direction, 1.000 inches minimum thread length, 3.250 inches nominal fastener length, hexagon head style, 0.226 inches minimum and 0.243 inches maximum head height

DAC	HCC	DMIL	RNCC
X	-	-	5

RNVC	SADC	MSDS	RNAAC
2	-	-	XX

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

1.000 inches minimum

Details

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

Fastener Length

3.250 inches nominal

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

0.226 inches minimum and 0.243 inches maximum

Details

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

Width Between Flats

0.612 inches minimum and 0.625 inches maximum

Details

None.

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.

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

74000 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

80.0 rockwell b minimum overall and 100.0 rockwell b maximum overall

Details

A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.

Surface Finish

125.0 microinches grip

Details

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

Surface Finish

125.0 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

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 gr 2 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.

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 2 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
0906695	6N299	5	-	5	2	-	75
0906695-2	6N299	5	-	3	2	-	75
906695	6N299	5	-	5	2	-	KZ
0E1289	92392	5	-	5	9	-	9Z
112593	72915	X	-	5	9	-	XX
S163	15434	X	-	5	2	-	XX
FFS85	81348	3	-	4	1	-	75
112593	24617	X	-	5	9	-	XX
C1029PC14	24617	X	-	5	9	-	XX
112593	7X677	5	-	C	1	-	ZZ
C1029PC14	7X677	5	-	C	1	-	ZZ
C1029PC14	55380	6	-	5	2	-	9Z
20210PCM1256	61208	X	-	5	2	-	XX
20212PCM1256	61208	X	-	5	2	-	XX
20555PCM1256	61208	X	-	5	2	-	XX
X9210PCM1256	61208	X	-	5	2	-	XX
X9211PCM1256	61208	X	-	5	2	-	XX

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	U

RVC	WCC	TCC	SHC
-	713	Z	9

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

ISO9001 / AS9100 Quality Standards
HAZMAT Certified
On Time Delivery
Qualified sales team
Counterfeit Parts Prevention
100% Product Inspections

Manufacturer

TWIN DISC, INCORPORATED

CAGE: 61208

MILWAUKEE , WI , 53202-6062

UNITED STATES

View Products

FAQs

Frequently asked questions for NSN 5305-00-011-2593

What is the NIIN of the NSN 5305-00-011-2593?

The National Item Identification Number (NIIN) of the NSN 5305-00-011-2593 is 00-011-2593

When the NSN 5305-00-011-2593 was assigned to the Federal Catalog?

It was assigned 61 years ago, on Tue, Jan 1, 1963

Does the NSN 5305-00-011-2593 contain any precious metals?

Type/content is unknown

Does the NSN 5305-00-011-2593 contain any hazardous material?

No data in HMIRS

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