6685-00-551-4378

Find complete technical information, availability, and procurement data for: 6685-00-551-4378
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for NSN 6685-00-551-4378 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Instruments and Laboratory Equipment

Federal Supply Classification

6685 Humidity Measuring and Controlling Instruments, Temperature and Pressure

National Stock Number

6685-00-551-4378

Item Name Code

16516

Assigment Date

01/01/1963 (63 years ago)

poppet flow control device, flange mounting method, 51.0 pounds per square inch opening pressure setting, 3.562 inches nominal overall height, cool engine oil usage design

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Overall Height: 3.562 inches nominal
Mounting Method: flange
Flow Control Device: poppet
Opening Pressure Setting: 51.0 pounds per square inch
Usage Design: cool engine oil
Valve Travel Distance: 0.250 inches nominal
Thermostat Type: solid expansion
Opening Temp Rating: 180.0 fahrenheit nominal
Operating Temp Rating: 180.0 fahrenheit nominal
Spring Operated Pressure Relief: provided
Distance Across Flats: 2.125 inches nominal
Inside Mounting Surface To Valve Seat Distance: 2.938 inches
Closing Pressure Setting: 57.0 pounds per square inch nominal

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
6680-00-561-3631	No Name Available	01/01/1963

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
18856-160	Flow Control Thermostat
9701700-10	Flow Control Thermostat
PS18856-160	Flow Control Thermostat

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 6685-00-551-4378?

The FSCG of the NSN 6685-00-551-4378 is 6685

Does the NSN 6685-00-551-4378 have a Schedule B code assigned?

Yes, the Schedule B code is 9032896040

Does NSN 6685-00-551-4378 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 6685-00-551-4378 contain precious materials?

Item does not contain precious metal.

Does NSN 6685-00-551-4378 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 6685-00-551-4378 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963