Model: 0.250-20UNC3B

Hexagon Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Nut Style

Hexagon

Nut Height

Between 0.360 inches and 0.390 inches

Width Across Flats

Between 0.492 inches and 0.504 inches

Tempurature Rating

250.0 degrees fahrenheit

Thread Series

Unc

Thready Qty Per Inch (tpi)

Hardness Rating

80.0 rockwell b

Thread Size

0.250 inches

Bearing Surface Type

Chamfered

Material

Nickel alloy r-405 or nickel alloy 400

Material Specification

Qq-n-281 federal specification all material responses

Surface Treatment

Zinc

NSN

5310-01-343-8828

Part Number

0.250-20UNC3B

Description

Nut,plain,hexagon

CAGE

81349

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 0.250-20UNC3B NSN 5310-01-343-8828

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

01857

FIIG:

A021A0

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:

093470

UFC:

48940

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)