Model: 3-2957-21

Vent Plug

Properties:

Thread Class

Inside Diameter

0.500 inches

Thread Length

0.375 inches

Outside Diameter

0.875 inches

Length

0.625 inches

Vent Hole Diameter

0.312 inches

End Connection Type

Threaded

Vent Hole Quantity

Vent Hole Shape

Round

Material

Aluminum alloy

Thread Size And Series/type Designator

0.875-14 unf

NSN

5340-00-673-1789

Part Number

3-2957-21

Description

Plug,vent

CAGE

09990

A ported item with or without external threads. The port(s) may contain a filtering disk or wire fabric. It is designed to be inserted into an opening in a cylinder, pump, regulator, valve, housing, casing, or the like, to permit the free flow of fluid from or to the atmosphere. Excludes breather.

Part 3-2957-21 NSN 5340-00-673-1789

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

28458

FIIG:

A539T0

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:

128000

UFC:

64870

LTL:

85.0

LCL:

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8421990080
SITC: 74395
End Use: Industrial machines, other
NAICS: 333999
USDA: 1

Freight Class: Parts of machinery and apparatus for filtering or purifying liquids and gases, nesoi