Model: 4024378

Thumbscrew

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.250 inches

Fastener Length

1.920 inches

Head Style

Knurled no. 4

Head Diameter

0.500 inches

Head Height

0.400 inches

Shoulder Diameter

0.297 inches first shoulder

Shoulder Length

1.170 inches first shoulder

First Diameter From Head

Between 0.077 inches and 0.083 inches

Distance From Largest Bearing Surface Of Head To End Of First Diameter

1.670 inches

Point Style

Pointless

Thread Diameter

0.112 inches

Thready Qty Per Inch (tpi)

Externally Relieved Body Diameter Quantity

Shoulder Shape

Round first shoulder

Material

Steel comp 303

Material Specification

Qq-s-764 federal specification single material response

Thread Series Designator

Unc

NSN

5305-01-098-2658

Part Number

4024378

Description

Thumbscrew

CAGE

07187

An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use screw (as modified) or bolt (as modified).

Part 4024378 NSN 5305-01-098-2658

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06673

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

096630

UFC:

50590

LTL:

70.0

LCL:

70.0

WCC:

573

TCC:

SHC:

ACC:

Equipment for Aircraft

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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