Model: HT4078-3-4A

Shoulder Screw

Special Features:

Cetyl alcohol lube and furnished with synthetic rubber o-ring

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.380 inches and 0.447 inches

Fastener Length

Between 0.640 inches and 0.687 inches

Head Style

Flat countersunk undercut

Head Diameter

Between 0.427 inches and 0.467 inches

Head Height

Between 0.068 inches and 0.070 inches

Shoulder Diameter

0.217 inches and 0.218 inches first shoulder

Shoulder Length

0.170 inches and 0.192 inches first shoulder

Internal Drive Style

High-torque

Thread Diameter

0.190 inches

Thready Qty Per Inch (tpi)

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Shoulder Shape

Round first shoulder

Material

Titanium alloy uns r56400

Material Specification

Ams 4928 assn standard single material response or ams 4967 assn standard single material response

Thread Series Designator

Unjf

NSN

5305-01-218-3143

Part Number

HT4078-3-4A

Description

Screw,shoulder

CAGE

17446

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 HT4078-3-4A NSN 5305-01-218-3143

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:

0.1000lbs

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:

136500

UFC:

68455

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 8109900000
SITC: 69987
End Use: Finished metal shapes
NAICS: 331491
USDA: 1

Freight Class: Zirconium and articles thereof nesoi