Seal Assembly, Shaft, Spring Loade4320-01-511-7923

NSN 4320-01-511-7923 · NIIN 015117923 · Part number 687829-442-135M-CB/SC-EP-1

A W Chesterton Co Div Sealing Device Division · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 71431

Government record, cited

NSN 4320-01-511-7923 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-511-7923. Manufacturer of record part number: 687829-442-135M-CB/SC-EP-1.

Also searched as 4320-01-511-7923 · 4320015117923 · NIIN 015117923 · 01-511-7923 · FSC 4320 Power and Hand Pumps · CAGE 71431 · 687829-442-135M-CB/SC-EP-1

Nearby stock numbers ← 4320-01-511-7922 · 4320-01-511-7924 →

Features

Seal Assembly,shaft,spring Loade — FSC 4320
1 manufacturer part number on file
Manufacturer of record: A W Chesterton Co Div Sealing Device Division

Identification

NSN: 4320-01-511-7923
NIIN: 015117923
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: 687829-442-135M-CB/SC-EP-1
Manufacturer: A W Chesterton Co Div Sealing Device Division

General Description

The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-511-7923, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is A W Chesterton Co Div Sealing Device Division. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4320-01-511-7923
Primary Part Number	687829-442-135M-CB/SC-EP-1
Item Name	Seal Assembly,shaft,spring Loade
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	A W Chesterton Co Div Sealing Device Division
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
687829-442-135M-CB/SC-EP-1 PRIMARY	A W Chesterton Co Div Sealing Device Division (USA)

No interchangeability data on file.

Other items in FSC 4320 — Power and Hand Pumps

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4320-00-001-1633

4320-00-001-1633 · Item name not on file

4320-00-001-2628

RETAINER AND PIN

4320-00-001-2629

HOUSING AND PIN

4320-00-001-2630

PUMP,CENTRIFUGAL

4320-00-001-2631

4320-00-001-2631 · Item name not on file

4320-00-001-2632

4320-00-001-2632 · Item name not on file

4320-00-001-3377

4320-00-001-3377 · Item name not on file

4320-00-001-3384

4320-00-001-3384 · Item name not on file

Frequently Asked Questions

What is NSN 4320-01-511-7923?

NSN 4320-01-511-7923 is a Seal Assembly,shaft,spring Loade, manufactured by A W Chesterton Co Div Sealing Device Division, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-511-7923?

NSN 4320-01-511-7923 has 1 manufacturer part number on file: 687829-442-135M-CB/SC-EP-1 (A W Chesterton Co Div Sealing Device Division).

What are the specifications of 687829-442-135M-CB/SC-EP-1?

Key specifications for 687829-442-135M-CB/SC-EP-1: Special Features: NOM:SEAL ASSEMBLY,SHAFT,STYLE:442,DIMENSION:135M,SEAL FACES:CARBON WITH SILICON CARBIDE,ELASTOMER:ETHYLENE PROPYLENE,RSC FACES,UOFM:EACH; Part Name Assigned by Controlling Agency: INAVY:MECH SEAL SPLIT. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4320-01-511-7923 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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