Model: 144791

Tapping Screw

Properties:

Fastener Length

0.250 inches

Head Style

Pan no. 2

Head Diameter

Between 0.256 inches and 0.270 inches

Head Height

Between 0.072 inches and 0.082 inches

Internal Drive Style

Slot

Features Provided

Casehardened

Nonmachine Thread Style

Gimlet point (type a, ab or ba)

Nonmachine Thread Diameter

0.138 inches

Material

Steel

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 type 2 cl 3 federal specification all treatment responses

Nondefinitive Specification/std Data

A type

Departure From Cited Document

As modified by casehardening and surface treatment

NSN

5305-00-014-4791

Part Number

144791

Description

Screw,tapping

CAGE

7X677

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes screw, assembled washer.

Part 144791 NSN 5305-00-014-4791

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

41756

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:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

50.0

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318140000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Self-tapping screws of iron or steel