Machine Screw

A593-340

(NSN) National Stock Number

5305-00-951-3728

Federal Supply Classification

5305 Screws

Item Name Code

06657

Schedule B Code

7318152000

Summary

2a thread class, right-hand thread direction, 0.375 inches maximum thread length, 0.375 inches nominal fastener length, watertight head style, 0.220 inches nominal head diameter

DAC	HCC	DMIL	RNCC
X	-	-	5

RNVC	SADC	MSDS	RNAAC
2	-	-	XX

Identification

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

INC	FIIG	Concept	Condition
06657	A500D0	-	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

0.375 inches maximum

Details

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

Fastener Length

0.375 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

watertight

Details

The style designation indicating the configuration that most nearly corresponds to the appearance of the head.

Head Diameter

0.220 inches nominal

Details

The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

Head Height

0.069 inches nominal

Details

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

Internal Drive Style

slot

Details

The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.

Nominal Thread Diameter

0.112 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

o ring

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.

Screw Material

steel corrosion resisting

Details

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

Screw Surface Treatment

passivate

Details

The metallic,nonmetallic,and/or chemical properties with which the screw is plated,dipped and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

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
639262-203	12436	X	-	5	2	-	XX
12370-1-6	10412	2	-	5	9	-	KE
58A5A308-2	10001	1	-	5	2	-	HD
5250-7113-5	05234	2	-	5	2	-	KE
70-31781-2	58854	X	-	5	9	-	XX
SMC540388-12	80063	5	-	5	2	-	CL
ES1126-2	20418	X	-	5	9	-	XX
200-11-004	58880	5	-	5	9	-	KE
1611013PC	94117	X	-	5	2	-	XX
408917-7	80020	2	-	5	2	-	KE
752640-130	02769	2	-	5	2	-	ZZ
4-40NC2AX3-8	97539	5	-	5	2	-	ZG
S4-40X3-8	97539	X	-	5	2	-	XX
SEELSKREW440X3-8	97539	X	-	5	2	-	XX
SS0440AA6	97539	X	-	3	2	-	XX
501C57-10-52	94033	5	-	5	2	-	KZ
752640-130	56232	2	-	5	9	-	SE
060044005	92110	2	-	5	2	-	KE
048282-008	89305	5	-	5	2	-	KE
7600754-3	93222	1	-	5	9	-	KZ