PartsTable TECHNICAL DATA SHEET

NSN 4820-01-701-6181Government record, cited

Valve, Check4820-01-701-6181

NSN 4820-01-701-6181 · NIIN 017016181 · Part number 21/2DD2R-36-364IX

O. C. Keckley Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 32869

Government record, cited

NSN 4820-01-701-6181 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-701-6181. Manufacturer of record part number: 21/2DD2R-36-364IX.

Also searched as 4820-01-701-6181 · 4820017016181 · NIIN 017016181 · 01-701-6181 · FSC 4820 Valves, Nonpowered · CAGE 32869 · 21/2DD2R-36-364IX · DD2R-36-364IX

Nearby stock numbers ← 4820-01-701-6176 Valve, Check · 4820-01-701-6292 Valve, Globe →

4820-01-701-6181 — Valves, Nonpowered

Features

Valve,check — FSC 4820
Flange Shape: ROUND ALL ENDS
Flange Face Design: PLAIN ALL ENDS
Connection Type: FLANGE ALL ENDS
Style Designator: STRAIGHT THRU
Valve Size: 2.50 INCHES IN
Face to Face Distance: 2.675 INCHES IN
Material: STEEL CORROSION RESISTING BODY

Identification

NSN: 4820-01-701-6181
NIIN: 017016181
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 21/2DD2R-36-364IX
Manufacturer: O. C. Keckley Company

General Description

The Valve,check, cataloged under National Stock Number 4820-01-701-6181, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is O. C. Keckley Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-701-6181
Primary Part Number	21/2DD2R-36-364IX
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	O. C. Keckley Company
Status	ACTIVE
Flange Shape	ROUND ALL ENDS
Flange Face Design	PLAIN ALL ENDS
Connection Type	FLANGE ALL ENDS
Style Designator	STRAIGHT THRU
Valve Size	2.50 INCHES IN
Face to Face Distance	2.675 INCHES IN
Material	STEEL CORROSION RESISTING BODY
Valve Operation Method	AUTOMATIC

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
21/2DD2R-36-364IX PRIMARY	O. C. Keckley Company (USA)

Reference documents

Reference	Meaning
DD2R-36-364IX	D/9 Drawing number reference only O. C. Keckley Company

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

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

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-701-6181?

NSN 4820-01-701-6181 is a Valve,check, manufactured by O. C. Keckley Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-701-6181?

NSN 4820-01-701-6181 has 1 manufacturer part number on file: 21/2DD2R-36-364IX (O. C. Keckley Company).

What are the specifications of 21/2DD2R-36-364IX?

Key specifications for 21/2DD2R-36-364IX: Flange Shape: ROUND ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Connection Type: FLANGE ALL ENDS; Style Designator: STRAIGHT THRU. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-701-6181 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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