Model: 421551

Machine Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.214 inches and 0.250 inches

Fastener Length

Between 0.219 inches and 0.250 inches

Head Style

Round

Head Diameter

Between 0.146 inches and 0.162 inches

Head Height

Between 0.059 inches and 0.069 inches

Internal Drive Style

Cross recess type 1

Thread Diameter

0.086 inches

Thready Qty Per Inch (tpi)

Screw Surface Treatment

Cadmium or zinc

Screw Surface Treatment Specification

Qq-p-416, type 1, cl 3 federal specification 1st treatment response or qq-z-325, type 1, cl 3 federal specification 2nd treatment response

Thread Series Designator

Unc

NSN

5305-00-285-4578

Part Number

421551

Description

Screw,machine

CAGE

21450

Part 421551 NSN 5305-00-285-4578

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06657

FIIG:

A500D0

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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