Model: 20491

Internal Wrenching Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.500 inches

Fastener Length

1.750 inches

Head Style

Knurled no. 1

Head Diameter

0.563 inches

Head Height

0.250 inches

Locking Feature

Pellet threads

First Diameter From Head

0.375 inches

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

1.250 inches

Internal Drive Style

Hexagon

End Application

F-22

Thread Diameter

0.313 inches

Width Across Flats

0.188 inches

Thready Qty Per Inch (tpi)

Part Name Assigned By Controlling Agency

Alloy standard shoulder screw/locking pellet 3/8" shlder dia, 1-1/4" shlder lg, 5/16"-18 thread

Material

Steel

Thread Series Designator

Unc

NSN

5306-01-498-3858

Part Number

20491

Description

Bolt,internal Wrenching

CAGE

2V507

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 20491 NSN 5306-01-498-3858

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:

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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