Model: NAS1218-04-25

Machine Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.232 inches

Fastener Length

Between 1.717 inches and 1.747 inches

Head Style

Pan

Head Diameter

Between 0.205 inches and 0.219 inches

Head Height

Between 0.070 inches and 0.080 inches

Internal Drive Style

Recessed type i

Thread Diameter

0.120 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Hardness Rating

Between 36.0 rockwell c and 40.0 rockwell c

Screw Material

Steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740

Screw Material Specification

Mil-s-5626 military specification 1st material response or mil-s-500 military specification 2nd material response or mil-s-8503 military specification 3rd material response or mil-s-6098 military specification 4th material response or mill-s-6049 military specification 5th material response

Screw Surface Treatment

Cadmium or chromate

Screw Surface Treatment Specification

Qq-p-416, ty1, cl3 federal specification single treatment response

Thread Series Designator

Unjc

NSN

5305-01-451-9329

Part Number

NAS1218-04-25

Description

Screw,machine

CAGE

80205

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.

Part NAS1218-04-25 NSN 5305-01-451-9329

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06657

FIIG:

A500D0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

133300

UFC:

63220

LTL:

RATING VARIABLE

LCL:

WCC:

72E

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318152000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment