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Technical Data Sheet
PartsTable / COMPONENT / NS-3983 1IN
NS-3983 1IN ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY BODY, connection_type: UNTHREADED INTERNAL PIPE ALL ENDS, connection_style: SOCKET (PIPE) ALL ENDS, style_designator: STRAIGHT THRU, mounting_position: HORIZONTAL, flow_control_device: DISK. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-103-7256, 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-3983 1IN
NSN: 4820-01-103-7256
FSC: 4820
CAGE: 11836 — NATIONAL OILWELL (USA)
SPECIFICATIONS
materialNICKEL ALLOY BODY
connection_typeUNTHREADED INTERNAL PIPE ALL ENDS
connection_styleSOCKET (PIPE) ALL ENDS
style_designatorSTRAIGHT THRU
mounting_positionHORIZONTAL
flow_control_deviceDISK
valve_operation_methodAUTOMATIC
nominal_pipe_size_accommodated1.000 INCHES ALL ENDS IN
NSN4820-01-103-7256
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NS-3983 1IN · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
VALVE OPERATION METHOD: AUTOMATIC
•
MATERIAL: NICKEL ALLOY SEAT
•
CONNECTION STYLE: SOCKET (PIPE) ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE ALL ENDS
•
MOUNTING POSITION: HORIZONTAL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL PIPE SIZE ACCOMMODATED1.000 INCHES ALL ENDS IN
VALVE OPERATION METHODAUTOMATIC
MATERIALNICKEL ALLOY SEAT
CONNECTION STYLESOCKET (PIPE) ALL ENDS
MATERIALNICKEL ALLOY AND RUBBER FLOW CONTROL DEVICE
STYLE DESIGNATORSTRAIGHT THRU
CONNECTION TYPEUNTHREADED INTERNAL PIPE ALL ENDS
MOUNTING POSITIONHORIZONTAL
MATERIALNICKEL ALLOY BODY
FLOW CONTROL DEVICEDISK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
NS-3983 ASSY EInterchangeable
interchangeable cross-reference
interchangeable
NS-3983Interchangeable
interchangeable cross-reference
interchangeable
S90075/300413Interchangeable
interchangeable cross-reference
interchangeable
S90091/300480Interchangeable
interchangeable cross-reference
interchangeable
NS-3983 FIND 32Interchangeable
interchangeable cross-reference
interchangeable
NS3983PC24Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NS-3983 1IN?
NS-3983 1IN is a VALVE,CHECK.
What parts can replace NS-3983 1IN?
There are 18 known substitutes for NS-3983 1IN: NS-3983 ASSY E, NS-3983, S90075/300413 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NS-3983 1IN?
NS-3983 1IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-103-7256. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026