Model: 6658757-1

Internally Relieved Body Bolt

Properties:

Threads Per Inch

18 concentric hole

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.617 inches and 0.633 inches

Fastener Length

Between 0.814 inches and 0.820 inches

Head Style

Hexagon

Head Height

Between 0.375 inches and 0.378 inches

Width Between Flats

1.000 inches

Internal Thread Length

1.192 inches concentric hole

Thread Diameter

0.750 inches

Thread Series

Unc concentric hole

Internal Thread Direction

Right-hand concentric hole

Thready Qty Per Inch (tpi)

Hardness Rating

320.0 brinell standard and 360.0 brinell standard

Thread Size

0.312 inches concentric hole

Internal Thread Class

3b concentric hole

Material

Steel comp 4340

Material Specification

Aisi 4340 assn standard single material response

Surface Treatment

Phosphate zinc or phosphate manganese

Surface Treatment Specification

Tt-c-490 type 1 assn standard 1st treatment response or dod-p-132 ty m cl 1 federal specification 2nd treatment response

Style Designator

Concentric hole threaded

Thread Series Designator

Unc

NSN

5306-01-369-0769

Part Number

6658757-1

Description

Bolt,internally Relieved Body

CAGE

53711

An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see bolt, fluid passage.

Part 6658757-1 NSN 5306-01-369-0769

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06676

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:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

574

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