Model: 620B644H01

Socket Head Cap Screw

Special Features:

3 slots in head 120.0 degrees apart, certified free from mercury contamination

Properties:

Thread Class

Thread Direction

Right-hand

Head Style

Flat chamfer

Head Diameter

Between 0.735 inches and 0.750 inches

Head Height

Between 0.492 inches and 0.500 inches

Internal Drive Style

Hexagon

Thread Diameter

0.500 inches

Width Across Flats

0.375 inches

Thready Qty Per Inch (tpi)

Criticality Code Justification

Zzzy

Material

Steel comp 304

Material Specification

66 federal standard single material response

Surface Treatment

Passivate

Special Test Features

Special quality control testing

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Test Data Document

81349-mil-p-23199 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

Thread Series Designator

Unc

Reference Number Differentiating Characteristics

As differentiated by material which must conform to ships parts control center special quality control provisions

NSN

5305-01-088-6835

Part Number

620B644H01

Description

Screw,cap,socket Head

CAGE

04808

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 620B644H01 NSN 5305-01-088-6835

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:

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