Model: GS520CK4-08

Socket Head Cap Screw

Special Features:

Threads to be double lead

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.477 inches and 0.636 inches

Fastener Length

Between 1.187 inches and 1.207 inches

Head Style

Flat countersunk

Head Diameter

Between 0.394 inches and 0.404 inches

Internal Drive Style

Hexagon

Thread Diameter

0.250 inches

Width Across Flats

Between 0.1409 inches and 0.1426 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Surface Finish

32.0 microinches grip

Material

Steel comp 4140 or steel comp 8740

Material Specification

Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 type 2 cl2 federal specification single treatment response

Thread Series Designator

Unf

NSN

5305-01-118-9593

Part Number

GS520CK4-08

Description

Screw,cap,socket Head

CAGE

29372

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 GS520CK4-08 NSN 5305-01-118-9593

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