NS-3981 — PARTS KIT,CHECK VALVE

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

NS-3981: PARTS KIT,CHECK VALVE.

The PARTS KIT,CHECK VALVE is a the manufacturer industrial component. Key specifications include height: 1.688 INCHES NOMINAL IN, material: COPPER ALLOY BODY, valve_size: 3.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, overall_length: 18.000 INCHES NOMINAL IN, connection_type: FLANGE ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-106-9785, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

NS-3981

NSN: 4820-01-106-9785
NIINs: 011069785, 011072452, 011259747, 011259993, 011456249, 011467060, 011918539, 012104188, 012104345, 012174707
FSC: 4820 — Valves, Nonpowered
CAGE: 11836 — NATIONAL OILWELL (USA)

SPECIFICATIONS

height	1.688 INCHES NOMINAL IN
material	COPPER ALLOY BODY
valve_size	3.000 INCHES IN
flange_shape	ROUND WITH HOLES ALL ENDS
port_quantity	2
overall_length	18.000 INCHES NOMINAL IN
connection_type	FLANGE ALL ENDS
outside_diameter	4.110 INCHES NOMINAL IN
style_designator	STRAIGHT THRU FLANGED ENDS
mounting_position	HORIZONTAL
nominal_thickness	1.375 INCHES ALL ENDS IN
bolt_hole_quantity	8 ALL ENDS
NSN	4820-01-106-9785

COMPONENT DIAGRAM

KEY FEATURES

•

VALVE TYPE FOR WHICH DESIGNED: CHECK

•

PORT QUANTITY: 2

•

VALVE SIZE FOR WHICH DESIGNED: 6.000 INCHES IN

•

VALVE DESIGN CONTROL ACTIVITY: 11836

•

MATERIAL: COPPER ALLOY

TECHNICAL CHARACTERISTICS

VALVE TYPE FOR WHICH DESIGNED	CHECK
PORT QUANTITY	2
OVERALL LENGTH	18.000 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED	6.000 INCHES IN
VALVE DESIGN CONTROL ACTIVITY	11836
MATERIAL	COPPER ALLOY

SUBSTITUTES & CROSS-REFERENCES 1

NS-3981ASSEMBLYE FIND1Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is NS-3981?

NS-3981 is a PARTS KIT,CHECK VALVE.

What parts can replace NS-3981?

There is 1 known substitute for NS-3981: NS-3981ASSEMBLYE FIND1. Substitute compatibility should be verified for your specific system.

What is the NSN for NS-3981?

NS-3981 is cataloged in the U.S. Government catalog under NSN 4820-01-106-9785. This indicates validated use in U.S. government and defense supply chains.

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