Model: AN531-4R4

Tapping Screw

Properties:

Fastener Length

0.250 inches

Head Style

Flat countersunk

Head Diameter

Between 0.216 inches and 0.225 inches

Internal Drive Style

Cross recess type 1

Nonmachine Thread Style

Dog type (type b or c)

Countersink Angle

Between 80.0 degrees and 82.0 degrees

Nonmachine Thread Diameter

0.112 inches

Material

Steel comp 4130

Material Specification

Qq-s-685 cond n federal specification single material response

Surface Treatment

Cadmium or zinc

NSN

5305-00-167-2373

Part Number

AN531-4R4

Description

Screw,tapping

CAGE

88044

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 AN531-4R4 NSN 5305-00-167-2373

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