Model: 1881B256

Round Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Drive Point Depth

0.188 inches

Nut Style

Round

Nut Diameter

3.875 inches

Nut Thickness

0.750 inches

Drive Point Width

0.440 inches

Drive Point Quantity

Hole Type And Quantity

4 tapped

Thread Series

Unj

Thready Qty Per Inch (tpi)

Thread Size

3.125 inches

Hole Thready Qty Per Inch (tpi)

Hole Configuration Style

Configuration f

Hole Thread Diameter

0.190 inches

Material

Steel comp 4340

Material Specification

Mil-s-8844, class 1 military specification single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 2, class 1 federal specification single treatment response

NSN

5310-01-187-3919

Part Number

1881B256

Description

Nut,plain,round

CAGE

13002

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 1881B256 NSN 5310-01-187-3919

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15887

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:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Trailers/Vehicles

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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