Model: 52-81-18

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.359 inches and 0.453 inches

Fastener Length

Between 0.421 inches and 0.453 inches

Head Style

Flat chamfer

Head Diameter

Between 0.262 inches and 0.270 inches

Head Height

Between 0.159 inches and 0.164 inches

Internal Drive Style

Hexagon

Thread Diameter

0.164 inches

Width Across Flats

Between 0.141 inches and 0.143 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

80000 pounds per square inch

Hardness Rating

80.0 rockwell b

Minimum Yield Strength

30000 pounds per square inch

Material

Steel comp 302 or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384 or steel

Material Specification

66 federal standard 1st material response or 66 federal standard 2nd material response or 66 federal standard 3rd material response or 66 federal standard 4th material response or 66 federal standard 5th material response or astm-a493 aisi xm-7 assn standard 6th material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Thread Series Designator

Unjc

Specification Data

80205-nas1352 professional/industrial association standard

NSN

5305-00-273-4022

Part Number

52-81-18

Description

Screw,cap,socket Head

CAGE

D9182

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 52-81-18 NSN 5305-00-273-4022

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

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:

0.1000lbs

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:

713

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