Model: BACS12HW3AU8

Close Tolerance Screw

Special Features:

Per asme b46.1. "d" diameter underside of head, root of threads and thread flanks 32 microinches ra. All other surfaces, 125 microinches ra.

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.276 inches

Fastener Length

Between 0.761 inches and 0.791 inches

Head Style

Flat chamfer

Head Diameter

Between 0.357 inches and 0.373 inches

Head Height

Between 0.122 inches and 0.133 inches

Spline Minor Diameter

Between 0.1105 inches and 0.1205 inches

Spline Major Diameter

Between 0.154 inches and 0.156 inches

Locking Feature

Prevailing torque all metal design

Grip Diameter

Between 0.1890 inches and 0.1895 inches

Internal Drive Style

Torx

End Application

Mv-22 aircraft

Thread Diameter

0.190 inches

Grip Length

Between 0.490 inches and 0.520 inches

Thready Qty Per Inch (tpi)

Criticality Code Justification

Agav

Part Name Assigned By Controlling Agency

Screw, pan head, close tolerance, short thread, six lobe

Material

Iron alloy 660

Material Specification

Ams 5731 a286 assn standard single material response or ams5732 a286 assn standard single material response or ams 5737 a286 assn standard single material response or ams 5853 a286 assn standard single material response

Surface Treatment

Passivate

Surface Treatment Specification

Ams-qq-p-35, type ii or viii assn standard single treatment response

Thread Series Designator

Unjf

NSN

5305-01-521-5145

Part Number

BACS12HW3AU8

Description

Screw,close Tolerance

CAGE

81205

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Part BACS12HW3AU8 NSN 5305-01-521-5145

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29294

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:

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:

096640

UFC:

50600

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Equipment for Aircraft

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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