Model: HT409A4-20

Shoulder Screw

Special Features:

Furnish with one o-ring 7m80

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.443 inches and 0.510 inches

Fastener Length

Between 1.703 inches and 1.750 inches

Head Style

Flat countersunk

Head Diameter

Between 0.502 inches and 0.507 inches

Shoulder Diameter

0.264 inches first shoulder and 0.265 inches first shoulder

Shoulder Length

1.173 inches first shoulder and 1.195 inches first shoulder

Internal Drive Style

High-torque

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Countersink Angle

100.0 degrees

Shoulder Shape

Round first shoulder

Material

Steel

Material Specification

3-52 fscm 76301 mfr ref single material response

Surface Treatment

Cadmium

Surface Treatment Specification

3-52 fscm 76301 mfr ref single treatment response

Thread Series Designator

Unf

NSN

5305-00-242-4637

Part Number

HT409A4-20

Description

Screw,shoulder

CAGE

92215

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes bolt, internal wrenching and screw, cap, socket head.

Part HT409A4-20 NSN 5305-00-242-4637

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

22846

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.4000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

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