Model: B18.3.1M-M8X1.25X20SHCSZNPLATE

Socket Head Cap Screw

Properties:

Thread Direction

Right-hand

Thread Length

Between 17.10 millimeters and 20.40 millimeters

Fastener Length

Between 1.60 millimeters and 20.40 millimeters

Head Style

Flat chamfer

Head Diameter

Between 12.70 millimeters and 13.00 millimeters

Head Height

Between 7.83 millimeters and 8.00 millimeters

Internal Drive Style

Hexagon

Thread Diameter

8.0 millimeters

Width Across Flats

Between 6.020 millimeters and 6.095 millimeters

Min. Tensile Strength (psi)

1220 megapascals

Hardness Rating

38.0 rockwell c and 44.0 rockwell c

Minimum Yield Strength

1100 megapascals

Thread Pitch In Millimeters

1.25

External Thread Tolerance Class

4g6g

Material

Steel property class 12.9

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2, class 3 federal specification single treatment response

Thread Series Designator

NSN

5305-01-300-6262

Part Number

B18.3.1M-M8X1.25X20SHCSZNPLATE

Description

Screw,cap,socket Head

CAGE

80204

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 B18.3.1M-M8X1.25X20SHCSZNPLATE NSN 5305-01-300-6262

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:

0.2000lbs

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