Pilot, Valve Seat Refacing4910-01-439-2923

NSN 4910-01-439-2923 · NIIN 014392923 · Part number E500

Sioux Tools Inc · FSC 4910 — Motor Vehicle Maintenance and Repair Shop Specialized Equipment · FSG 49 — Maintenance and Repair Shop Equipment · CAGE 00988

Government record, cited

NSN 4910-01-439-2923 — this item is cataloged by the U.S. Government under National Stock Number 4910-01-439-2923. Manufacturer of record part number: E500.

Also searched as 4910-01-439-2923 · 4910014392923 · NIIN 014392923 · 01-439-2923 · FSC 4910 Motor Vehicle Maintenance and Repair Shop Specialized Equipment · CAGE 00988 · E500 · NO. 1726E ITEM 33

Nearby stock numbers ← 4910-01-439-2908 Pilot, Valve Seat Refacing · 4910-01-439-2986 Pilot, Valve Seat Refacing →

Features

Pilot,valve Seat Refacing — FSC 4910
Design Type: EXPANDING
Size: 0.5000 INCHES NOMINAL IN
2 manufacturer part numbers on file
Manufacturer of record: Sioux Tools Inc

Identification

NSN: 4910-01-439-2923
NIIN: 014392923
FSC: 4910 — Motor Vehicle Maintenance and Repair Shop Specialized Equipment
FSG: 49 — Maintenance and Repair Shop Equipment
Primary part number: E500
Manufacturer: Sioux Tools Inc

General Description

The Pilot,valve Seat Refacing, cataloged under National Stock Number 4910-01-439-2923, is classified within Federal Supply Class 4910 (Motor Vehicle Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Sioux Tools Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4910-01-439-2923
Primary Part Number	E500
Item Name	Pilot,valve Seat Refacing
FSC / FSG	4910 / 49 — Motor Vehicle Maintenance and Repair Shop Specialized Equipment
Manufacturer	Sioux Tools Inc
Status	ACTIVE
Design Type	EXPANDING
Size	0.5000 INCHES NOMINAL IN

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
NO. 1726E ITEM 33	Sioux Tools Inc (USA)
E500 PRIMARY	Sioux Tools Inc (USA)

Frequently Asked Questions

What is NSN 4910-01-439-2923?

NSN 4910-01-439-2923 is a Pilot,valve Seat Refacing, manufactured by Sioux Tools Inc, classified under FSC 4910, Motor Vehicle Maintenance and Repair Shop Specialized Equipment. Status: active.

What part numbers are listed for NSN 4910-01-439-2923?

NSN 4910-01-439-2923 has 2 manufacturer part numbers on file: NO. 1726E ITEM 33 (Sioux Tools Inc), E500 (Sioux Tools Inc).

What are the specifications of E500?

Key specifications for E500: Design Type: EXPANDING; Size: 0.5000 INCHES NOMINAL IN; Special Features: USED ON WASP CLASS LHA. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4910-01-439-2923 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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