Regulator Unit, Air Flow, Oxygen a6685-01-685-3740

NSN 6685-01-685-3740 · NIIN 016853740 · Part number 635

Aqua Environment Co, Inc · FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 0PH81

Government record, cited

NSN 6685-01-685-3740 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-685-3740. Manufacturer of record part number: 635.

Also searched as 6685-01-685-3740 · 6685016853740 · NIIN 016853740 · 01-685-3740 · FSC 6685 Pressure, Temperature, and Humidity Measuring and Controlling Instruments · CAGE 0PH81 · 635

Nearby stock numbers ← 6685-01-685-3728 Sensor, Ambient Temperature · 6685-01-685-3858 Transmitter, Pressure →

Features

Regulator Unit,air Flow,oxygen a — FSC 6685
Inlet Connection Nominal Pipe Size: 0.50 INCHES IN
Outlet Connection Nominal Pipe Size: 0.50 INCHES IN
Cylinder Pressure Gage Range: +150.0 TO 6000.0 POUNDS PER SQUARE INCH LBS
Maximum Delivery Pressure: 6000.0 POUNDS PER SQUARE INCH LBS
Material: ALUMINUM BODY
1 manufacturer part number on file
Manufacturer of record: Aqua Environment Co, Inc

Identification

NSN: 6685-01-685-3740
NIIN: 016853740
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: 635
Manufacturer: Aqua Environment Co, Inc

General Description

The Regulator Unit,air Flow,oxygen a, cataloged under National Stock Number 6685-01-685-3740, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Aqua Environment Co, Inc. Government technical data includes 5 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	6685-01-685-3740
Primary Part Number	635
Item Name	Regulator Unit,air Flow,oxygen a
FSC / FSG	6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Manufacturer	Aqua Environment Co, Inc
Status	ACTIVE
Inlet Connection Nominal Pipe Size	0.50 INCHES IN
Outlet Connection Nominal Pipe Size	0.50 INCHES IN
Cylinder Pressure Gage Range	+150.0 TO 6000.0 POUNDS PER SQUARE INCH LBS
Maximum Delivery Pressure	6000.0 POUNDS PER SQUARE INCH LBS
Material	ALUMINUM BODY

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
635 PRIMARY	Aqua Environment Co, Inc (USA)

No interchangeability data on file.

Other items in FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments

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

6685-00-001-1475

6685-00-001-1475 · Item name not on file

6685-00-001-1503

CONTROL,TOTALIZER

6685-00-001-1643

6685-00-001-1643 · Item name not on file

6685-00-001-1711

GAGE,PRESSURE,DIAL INDICATING

6685-00-001-2099

6685-00-001-2099 · Item name not on file

6685-00-001-2100

6685-00-001-2100 · Item name not on file

6685-00-001-2101

6685-00-001-2101 · Item name not on file

6685-00-001-2102

6685-00-001-2102 · Item name not on file

Frequently Asked Questions

What is NSN 6685-01-685-3740?

NSN 6685-01-685-3740 is a Regulator Unit,air Flow,oxygen a, manufactured by Aqua Environment Co, Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.

What part numbers are listed for NSN 6685-01-685-3740?

NSN 6685-01-685-3740 has 1 manufacturer part number on file: 635 (Aqua Environment Co, Inc).

What are the specifications of 635?

Key specifications for 635: Inlet Connection Nominal Pipe Size: 0.50 INCHES IN; Outlet Connection Nominal Pipe Size: 0.50 INCHES IN; Cylinder Pressure Gage Range: +150.0 TO 6000.0 POUNDS PER SQUARE INCH LBS; Maximum Delivery Pressure: 6000.0 POUNDS PER SQUARE INCH LBS. 5 specifications are documented in the U.S. Government catalog.

Is NSN 6685-01-685-3740 hazardous material?

Possible hazard — SDS may be required (DLA HMIC P). 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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