Model: 4-40-3-8

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.263 inches

Fastener Length

0.375 inches

Head Style

Flat chamfer

Head Diameter

0.183 inches

Head Height

0.112 inches

Internal Drive Style

Hexagon

Thread Diameter

0.112 inches

Width Across Flats

0.079 inches

Thready Qty Per Inch (tpi)

Hardness Rating

38.0 rockwell c and 42.0 rockwell c

Minimum Yield Strength

150000 pounds per square inch

Material

Steel comp 303 or steel comp 303se

Material Specification

Mil-s-7720 military specification 1st material response or mil-s-18732 military specification 2nd material response

Surface Treatment

Passivate

Thread Series Designator

Unc

NSN

5305-00-845-3865

Part Number

4-40-3-8

Description

Screw,cap,socket Head

CAGE

70276

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 4-40-3-8 NSN 5305-00-845-3865

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

713

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