Model: B18.3-3/8UNC-2AX3.75LGCSHDNICAL

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 1.256 inches and 1.560 inches

Fastener Length

Between 3.690 inches and 3.750 inches

Head Style

Flat countersunk

Head Diameter

Between 0.720 inches and 0.781 inches

Locking Feature

Patch threads or strip threads

Internal Drive Style

Hexagon

Thread Diameter

0.375 inches

Width Across Flats

0.312 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

130000 pounds per square inch

Minimum Yield Strength

90000 pounds per square inch

Countersink Angle

Between 80.0 degrees and 84.0 degrees

Material

Nickel alloy k-500 fastener

Material

Plastic polyamide locking feature

Material Specification

Mil-f-18240 military specification single material response locking feature

Material Specification

Qq-n-286, class a federal specification single material response fastener

Thread Series Designator

Unc

NSN

5305-01-406-9183

Part Number

B18.3-3/8UNC-2AX3.75LGCSHDNICAL

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 B18.3-3/8UNC-2AX3.75LGCSHDNICAL NSN 5305-01-406-9183

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:

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:

096640

UFC:

50600

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7508900000
SITC: 69975
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)