Model: 431B501-31

Internal Wrenching Bolt

Special Features:

May be plated all over

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

1.000 inches

Fastener Length

3.000 inches

Head Diameter

Between 0.988 inches and 1.000 inches

Head Height

Between 0.605 inches and 0.625 inches

First Diameter From Head

Between 0.490 inches and 0.500 inches

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

2.000 inches

Internal Drive Style

Hexagon

Thread Diameter

0.625 inches

Width Across Flats

Between 0.562 inches and 0.565 inches

Thready Qty Per Inch (tpi)

Surface Finish

63.0 microinches head

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Material Specification

C50a-400, gr b1601289, fscm 24446 mfr ref single material response

Surface Treatment

Copper and cadmium

Surface Treatment

Copper and cadmium

Thread Series Designator

Unc

NSN

5306-00-411-0730

Part Number

431B501-31

Description

Bolt,internal Wrenching

CAGE

53711

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 431B501-31 NSN 5306-00-411-0730

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:

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