O-Ring5331-01-645-3780

NSN 5331-01-645-3780 · NIIN 016453780 · Part number 21020

Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco · FSC 5331 — O-ring · FSG 53 — Hardware and Abrasives · CAGE 0K7M2

Government record, cited

NSN 5331-01-645-3780 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-645-3780. Manufacturer of record part number: 21020.

Also searched as 5331-01-645-3780 · 5331016453780 · NIIN 016453780 · 01-645-3780 · FSC 5331 O-ring · CAGE 0K7M2 · 21020

Nearby stock numbers ← 5331-01-645-3712 O-Ring · 5331-01-645-3782 O-Ring →

5331-01-645-3780 — O-ring

Features

O-Ring — FSC 5331
Cross-Sectional Height: 0.139 INCHES NOMINAL IN
Outside Diameter: 0.887 INCHES NOMINAL IN
Center Hole Diameter: 0.609 INCHES NOMINAL IN
1 manufacturer part number on file
Manufacturer of record: Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco

Identification

NSN: 5331-01-645-3780
NIIN: 016453780
FSC: 5331 — O-ring
FSG: 53 — Hardware and Abrasives
Primary part number: 21020
Manufacturer: Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco

General Description

The O-Ring, cataloged under National Stock Number 5331-01-645-3780, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5331-01-645-3780
Primary Part Number	21020
Item Name	O-Ring
FSC / FSG	5331 / 53 — O-ring
Manufacturer	Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco
Status	ACTIVE
Cross-Sectional Height	0.139 INCHES NOMINAL IN
Outside Diameter	0.887 INCHES NOMINAL IN
Center Hole Diameter	0.609 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
21020 PRIMARY	Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco (USA)

Reference documents

Reference	Meaning
21020	5/9 Secondary reference Proliance Consulting, Llc

Frequently Asked Questions

What is NSN 5331-01-645-3780?

NSN 5331-01-645-3780 is a O-Ring, manufactured by Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco, classified under FSC 5331, O-ring. Status: active.

What part numbers are listed for NSN 5331-01-645-3780?

NSN 5331-01-645-3780 has 1 manufacturer part number on file: 21020 (Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco).

What are the specifications of 21020?

Key specifications for 21020: Cross-Sectional Height: 0.139 INCHES NOMINAL IN; Outside Diameter: 0.887 INCHES NOMINAL IN; Center Hole Diameter: 0.609 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: O-RING PARK. 3 specifications are documented in the U.S. Government catalog.

Is NSN 5331-01-645-3780 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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