Model: 66-14778-1

Internal Wrenching Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.673 inches and 0.703 inches

Fastener Length

Between 4.985 inches and 5.015 inches

Head Style

Bevel-conical

Head Diameter

Between 0.615 inches and 0.625 inches

Head Height

0.343 inches

Shank Unthreaded Hole Diameter

0.106 inches first hole and 0.111 inches first hole

Internal Drive Style

Hexagon

Thread Diameter

0.375 inches

Width Across Flats

Between 0.3755 inches and 0.3785 inches

Thready Qty Per Inch (tpi)

Distance From Head Largest Bearing Surface To Shank Hole Center

4.781 inches first hole

Material

Aluminum alloy 2024

Material Specification

Qq-a-200/3 temper t4 federal specification single material response

Surface Treatment

Anodize

Surface Treatment Specification

Mil-a-8625 type 1 military specification single treatment response

Thread Series Designator

Unf

NSN

5306-01-079-7245

Part Number

66-14778-1

Description

Bolt,internal Wrenching

CAGE

17765

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It is designed with an internal socket or internal multiple spline for use with an internal driver. The head is beveled (conical) or cylindrical in shape. Items with cylindrical shaped heads must have an externally relieved body. A locking feature may be incorporated in the design of the head or threads. See also screw, cap, socket head. Excludes setscrew; screw, shoulder; bolt, shoulder; screw, externally relieved body; bolt, externally relieved body; and screw, machine.

Part 66-14778-1 NSN 5306-01-079-7245

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06666

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:

013280

UFC:

05450

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7616106000
SITC: 69440
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Threaded fasteners of aluminum