Model: S1021Z4-4

Tapping Screw

Properties:

Fastener Length

0.250 inches

Head Style

Button

Head Diameter

Between 0.241 inches and 0.258 inches

Head Height

Between 0.059 inches and 0.069 inches

Internal Drive Style

Cross recess type 1

Features Provided

Casehardened

Nonmachine Thread Style

Dog type (type b or c)

Nonmachine Thread Diameter

0.112 inches

Material

Steel

Surface Treatment

Cadmium

NSN

5305-00-205-3109

Part Number

S1021Z4-4

Description

Screw,tapping

CAGE

71379

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 S1021Z4-4 NSN 5305-00-205-3109

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