Model: 255710

Externally Relieved Body Bolt

Properties:

Thread Direction

Right-hand

Thread Length

0.438 inches

Fastener Length

Between 0.552 inches and 0.572 inches

Head Style

Double hexagon w/hole

Head Height

Between 0.365 inches and 0.385 inches

Width Between Flats

Between 0.367 inches and 0.376 inches

Extended Washer Diameter

Between 0.490 inches and 0.510 inches

Extended Washer Thickness

Between 0.070 inches and 0.080 inches

Hole Diameter

0.065 inches

First Diameter From Head

Between 0.251 inches and 0.274 inches

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

0.125 inches

Thread Diameter

0.312 inches

Hole Quantity

Hole Type

Drilled

Nonstandard Thread Pitch Diameter

+0.2800/+0.2824 inches

Thready Qty Per Inch (tpi)

Hardness Rating

30.0 rockwell c and 38.0 rockwell c

Hole Configuration Style

Double hexagon longitudinal hole

Externally Relieved Body Diameter Quantity

Material

Stainless steel

Material Specification

Ams 5616 assn standard single material response

Precious Material

Silver

Surface Treatment

Silver

Surface Treatment Specification

Ams 2410 assn standard single treatment response

Thread Series Designator

Unf

NSN

5306-00-207-5190

Part Number

255710

Description

Bolt,externally Relieved Body

CAGE

77445

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 255710 NSN 5306-00-207-5190

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:

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