Model: 1634-256-A-7

Round Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Nut Style

Round

Nut Diameter

Between 0.172 inches and 0.203 inches

Nut Thickness

Between 0.297 inches and 0.328 inches

Thread Series

Unc

Thready Qty Per Inch (tpi)

Thread Size

0.086 inches

Material

Aluminum alloy 6061 or aluminum alloy 2011

Material Specification

Qq-a-225/8 t6 federal specification 1st material response or qq-a-225/3 t3 federal specification 2nd material response

Surface Treatment

Chromate

Surface Treatment Specification

Mil-c-5541 military specification single treatment response

NSN

5310-01-116-8971

Part Number

1634-256-A-7

Description

Nut,plain,round

CAGE

55566

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 1634-256-A-7 NSN 5310-01-116-8971

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:

013540

UFC:

05680

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7616995095
SITC: 69979
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Articles of aluminum nesoi