Model: HR4L P/SB

Panel Screw Assembly

Special Features:

Head 0.250 - 20 unc 2b 0.438

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.500 inches

Fastener Length

1.938 inches

Head Style

Hexagon

Width Between Flats

Between 0.428 inches and 0.438 inches

Internal Drive Style

W/o internal drive

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Material

Steel

Surface Treatment

Chromate zinc

Surface Treatment Specification

Iaw5633, typeii, classfe/zn 5 assn standard 1st treatment response

Thread Series Designator

Unc

NSN

5305-01-472-5644

Part Number

HR4L P/SB

Description

Screw Assembly,panel

CAGE

59793

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

Part HR4L P/SB NSN 5305-01-472-5644

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

33044

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:

096640

UFC:

50600

LTL:

70.0

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