Model: 18S01-4-1AA

Panel Screw Assembly

Special Features:

Recess plug depth 0.130 - 0.150 inches; stud diameter 0.247 - 0.249 inches; interior threads

Properties:

Thread Class

Thread Direction

Right-hand

Fastener Length

0.800 inches

Head Style

Flat countersunk

Head Diameter

0.358 inches

Internal Drive Style

Hexagon

Thread Diameter

0.164 inches

Width Across Flats

Between 0.157 inches and 0.159 inches

Thready Qty Per Inch (tpi)

Countersink Angle

100.0 degrees

Part Name Assigned By Controlling Agency

Stud assembly, flush

Lead Thread Quantity

Four

Material

Steel comp 8740

Material Specification

Mil-s-6049 military specification all material responses

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, ty2 cl2 federal specification all treatment responses

Thread Series Designator

Unf

NSN

5305-01-553-3542

Part Number

18S01-4-1AA

Description

Screw Assembly,panel

CAGE

71286

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

Part 18S01-4-1AA NSN 5305-01-553-3542

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

33044

FIIG:

A003B0

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:

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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