Model: 3678

Externally Relieved Body Bolt

Special Features:

Hole drilled in center of screw tip 0.098-0.105 in. Diameter by 1.093-1.110 in. Deep

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 1.540 inches and 1.570 inches

Fastener Length

Between 2.180 inches and 2.200 inches

Head Style

Hexagon

Head Height

Between 0.125 inches and 0.137 inches

Width Between Flats

Between 0.432 inches and 0.437 inches

First Diameter From Head

Between 0.410 inches and 0.430 inches

Second Diameter From Head

Between 0.490 inches and 0.491 inches

Third Diameter From Head

Between 0.400 inches and 0.420 inches

Fourth Diameter From Head

Between 0.490 inches and 0.491 inches

Fifth Diameter From Head

Between 0.400 inches and 0.420 inches

Distance From Largest Bearing Surface Of Head To End Of First Diameter

Between 0.060 inches and 0.063 inches

Distance From Largest Bearing Surface Of Head To End Of Second Diameter

Between 0.930 inches and 0.960 inches

Distance From Largest Bearing Surface Of Head To End Of Third Diameter

Between 1.071 inches and 1.101 inches

Distance From Largest Bearing Surface Of Head To End Of Fourth Diameter

Between 1.600 inches and 1.630 inches

Distance From Largest Bearing Surface Of Head To End Of Fifth Diameter

Between 1.953 inches and 1.963 inches

Thread Diameter

0.500 inches

Thready Qty Per Inch (tpi)

Externally Relieved Body Diameter Quantity

Material

Steel

Thread Series Designator

Unf

NSN

5306-01-107-6371

Part Number

3678

Description

Bolt,externally Relieved Body

CAGE

75078

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercuts for thread relief). It is no. 10 (0.190 in.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, internal wrenching and thumbscrew. See also screw, externally relieved body.

Part 3678 NSN 5306-01-107-6371

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06675

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:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

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