Model: 20-2057

Hexagon Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Nut Style

Hexagon

Nut Height

0.219 inches

Width Across Flats

Between 0.621 inches and 0.628 inches

Thread Series

Unf

Thready Qty Per Inch (tpi)

Thread Size

0.375 inches

Countersink Angle

90.0 degrees nut

Bearing Surface Type

Chamfered

Material

Steel comp 1137 or steel comp 1141 or steel comp 4130 or steel comp 4140

Material Specification

Qq-s-637 federal specification 1st material response or qq-s-637 federal specification 2nd material response or mil-s-6758 military specification 3rd material response or mil-s-5626 military specification 4th material response

Surface Treatment

Cadmium

Surface Treatment Specification

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

NSN

5310-01-015-6648

Part Number

20-2057

Description

Nut,plain,hexagon

CAGE

1EM77

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 20-2057 NSN 5310-01-015-6648

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:

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:

573

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel