Wearing Ring

NSN: 4320-00-077-0931 | Model: C258A

A cylindrical item with or without flang (s) , designed to be inserted in a pump casing or secured to the impeller of a centrifugal pump. It is used for the purpose of providing a close running clearance between the impeller and casing in order to prevent or overcome leakage due to erosion. It may also be used as a diffuser ring in the suction and discharge throats of valves.

NSN Properties and Flags

NATO Stock Number

4320-00-077-0931

DEMIL

Body Style

Internal flange w/external locking flange

Overall Length

1.005 inches

Body Outside Diameter

5.250 inches

Body Inside Diameter

Between 4.480 inches and 4.500 inches

Corner Radius

0.078 inches inside right corner

Left Side Flange Thickness

Between 0.188 inches and 0.203 inches

Right Side Flange Thickness

Between 0.188 inches and 0.203 inches

Distance Between Flanges

0.625 inches

End To Flange Distance

Between 0.780 inches and 0.812 inches

Internal Flange Inside Diameter

3.625 inches

Internal Flange Width

Between 0.328 inches and 0.375 inches

Smallest External Anchor Flange Radius

Between 2.500 inches and 2.555 inches

Largest External Anchor Flange Radius

2.750 inches

Distance Below Centerline

0.125 inches

Distance From End

0.250 inches

Corner Shape

Square outside right corner

Material

Copper alloy

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 4320-00-077-0931 Datasheet

Supply Class (FSC):

Power And Hand Pumps

Cross Reference:

C258A

Cage Codes:

Warren Pumps Llc (CAGE 63857)

Schedule B & Trade:

Schedule B: 8413919520 (NAICS 333911)

Parts, nesoi, of pumps for liquids
SITC: 74291

Parts of pumps for liquids
End Use: 21100

Industrial engines

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:

NMFC:

128000 - Pumps pwr noi/working heads/parts
WCC:

594 - Pumps and parts, (machinery and parts),(less than 35 feet)
SHC:

9 - Other or no special handling required (sh)
ADC:

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
LTL:

M - 85.0
ACC:

V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
J
Quantity per pack
1
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
U
MGMT_CTL
9b-----
Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $1,403.89 to $2,339.82..
Does NSN 4320-00-077-0931 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Navy
What is the NIIN of NSN 4320-00-077-0931?
000770931 or 00-077-0931
Does NSN 4320-00-077-0931 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4320-00-077-0931?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Aug 02, 1967