Model: 518881-6

Internal Wrenching Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

3.750 inches

Fastener Length

5.500 inches

Head Style

Knurled no. 1

Head Diameter

1.000 inches

Head Height

0.500 inches

Internal Drive Style

Square

Thread Diameter

0.625 inches

Width Across Flats

Between 0.500 inches and 0.505 inches

Thready Qty Per Inch (tpi)

Hardness Rating

36.0 rockwell c and 40.0 rockwell c

Material

Steel

Material Specification

Wil-s-5000 military specification 1st material response and mil-s-6049 military specification 2nd material response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 2 federal specification single treatment response

Thread Series Designator

Unjc

NSN

5306-01-263-6831

Part Number

518881-6

Description

Bolt,internal Wrenching

CAGE

80020

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 518881-6 NSN 5306-01-263-6831

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