Model: B18.2.1

Hexagon Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.469 inches and 0.625 inches

Fastener Length

Between 0.594 inches and 0.625 inches

Head Style

Hexagon

Head Height

Between 0.150 inches and 0.163 inches

Width Between Flats

Between 0.428 inches and 0.437 inches

End Application

Mrap-rg-33 armored utility vehicle (auv)

End Application

Mrap-rg-33 armored utility vehicle (auv); mrap - m-atv with cs13 pop and sne

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

150000 pounds per square inch

Hardness Rating

33.0 rockwell c and 39.0 rockwell c

Hardness Rating

33.0 rockwell c and 39.0 rockwell c

Surface Finish

63.0 microinches threads

Material

Steel

Material Specification

Saej429 grade 8 assn standard single material response or astm a354 grade bd assn standard single material response

Material Specification

Saej429 grade 8 assn standard single material response or astm a354 grade bd assn standard single material response

Surface Treatment

Zinc and chromate

Surface Treatment

Zinc and chromate

Surface Treatment Specification

Astm b633 type 2 sc 3 assn standard single treatment response

Thread Series Designator

Unc

NSN

5305-00-068-7837

Part Number

B18.2.1

Description

Screw,cap,hexagon Head

CAGE

05047

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. the threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. the thread length being the controlled dimension, the grip length is not specified. a locking feature may be incorporated in the design of the head or threads. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. excludes bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

Part B18.2.1 NSN 5305-00-068-7837

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

18257

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:

1.4000lbs

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