O-Ring5331-01-503-1044

NSN 5331-01-503-1044 · NIIN 015031044 · Part number 000639125

Core Industries Inc. Dba Mueller Steam Specialty · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 76588

Government record, cited

NSN 5331-01-503-1044 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-503-1044. Manufacturer of record part number: 000639125.

Also searched as 5331-01-503-1044 · 5331015031044 · NIIN 015031044 · 01-503-1044 · FSC 5331 O-ring · CAGE 76588 · 000639125 · 2.5-51-08-3 · AN-2.5-51 PART NO.17

Nearby stock numbers ← 5331-01-503-1042 O-Ring · 5331-01-503-1097 O-Ring →

5331-01-503-1044 — O-ring

Features

O-Ring — FSC 5331
Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
3 manufacturer part numbers on file
Manufacturer of record: Core Industries Inc. Dba Mueller Steam Specialty

Identification

NSN: 5331-01-503-1044
NIIN: 015031044
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 000639125
Manufacturer: Core Industries Inc. Dba Mueller Steam Specialty

General Description

The O-Ring, cataloged under National Stock Number 5331-01-503-1044, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 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	5331-01-503-1044
Primary Part Number	000639125
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Manufacturer	Core Industries Inc. Dba Mueller Steam Specialty
Status	ACTIVE
Material	RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR

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
000639125 PRIMARY	Core Industries Inc. Dba Mueller Steam Specialty (USA)
2.5-51-08-3	Core Industries Inc. Dba Mueller Steam Specialty (USA)
AN-2.5-51 PART NO.17	Core Industries Inc. Dba Mueller Steam Specialty (USA)

Frequently Asked Questions

What is NSN 5331-01-503-1044?

NSN 5331-01-503-1044 is a O-Ring, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 5331, O-ring. Status: active.

What part numbers are listed for NSN 5331-01-503-1044?

NSN 5331-01-503-1044 has 3 manufacturer part numbers on file: 000639125 (Core Industries Inc. Dba Mueller Steam Specialty), 2.5-51-08-3 (Core Industries Inc. Dba Mueller Steam Specialty), AN-2.5-51 PART NO.17 (Core Industries Inc. Dba Mueller Steam Specialty).

What are the specifications of 000639125?

Key specifications for 000639125: Part Name Assigned by Controlling Agency: SEAT O-RING,BUNA-N; End Item Identification: 2 1/2 INCH NO.51 BUTTERFLY VALVE HARD SEAT ASSEMBLY IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 1 specification is documented in the U.S. Government catalog.

Is NSN 5331-01-503-1044 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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