Model: 518881-1

Internal Wrenching Bolt

Properties:

Thread Class

Thread Direction

Left-hand

Thread Length

0.812 inches

Fastener Length

1.333 inches

Head Diameter

0.750 inches

Head Height

0.333 inches

Thread Diameter

0.500 inches

Width Across Flats

Between 0.375 inches and 0.380 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Hardness Rating

36.0 rockwell c and 40.0 rockwell c

Chamfer Angle

30.0 degrees

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Surface Treatment

Nickel and cadmium

Surface Treatment Specification

Ams2424b assn standard 1st treatment response and qq-p-416, type 2 federal specification 2nd treatment response

Thread Series Designator

Unc

NSN

5306-01-092-6937

Part Number

518881-1

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 518881-1 NSN 5306-01-092-6937

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