Model: 32-31840-3

Internal Wrenching Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

1.081 inches

Fastener Length

1.617 inches

Head Style

Flat chamfer

Head Diameter

Between 0.773 inches and 0.774 inches

Head Height

0.460 inches

Shank Unthreaded Hole Diameter

0.062 inches first hole and 0.065 inches first hole

Shank Unthreaded Hole Diameter

0.062 inches and 0.065 inches first hole

Internal Drive Style

Hexagon

Thread Diameter

0.312 inches

Width Across Flats

Between 0.374 inches and 0.375 inches

Thready Qty Per Inch (tpi)

Distance From Head Largest Bearing Surface To Shank Hole Center

0.085 inches first hole and 0.115 inches first hole

Distance From Head Largest Bearing Surface To Shank Hole Center

0.085 inches and 0.115 inches first hole

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel comp 4140

Surface Treatment

Cadmium

Thread Series Designator

Unf

NSN

5306-00-783-4778

Part Number

32-31840-3

Description

Bolt,internal Wrenching

CAGE

76301

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 32-31840-3 NSN 5306-00-783-4778

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:

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