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Technical Data Sheet
PartsTable / COMPONENT / 6401B-01
6401B-01 ✓ 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: COPPER ALLOY BODY, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL BOSS ALL ENDS, connection_style: GASKET SEAL (BOSS) ALL ENDS, special_features: USED ON PIPING ASSEMBLY PURGE SYSTEM, style_designator: STRAIGHT THRU. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-415-1013, 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
6401B-01
NSN: 4820-01-415-1013
FSC: 4820
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL BOSS ALL ENDS
connection_styleGASKET SEAL (BOSS) ALL ENDS
special_featuresUSED ON PIPING ASSEMBLY PURGE SYSTEM
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND ALL ENDS
mounting_positionHORIZONTAL
disk_loading_methodSPRING
flow_control_deviceDISK
nominal_thread_size0.750 INCHES ALL ENDS IN
valve_operation_methodAUTOMATIC
NSN4820-01-415-1013
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6401B-01 · 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
•
FLOW CONTROL DEVICE: DISK
•
CONNECTION TYPE: THREADED INTERNAL BOSS ALL ENDS
•
DISK LOADING METHOD: SPRING
•
MOUNTING POSITION: HORIZONTAL
•
THREAD CLASS: 3B ALL ENDS
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
FLOW CONTROL DEVICEDISK
CONNECTION TYPETHREADED INTERNAL BOSS ALL ENDS
DISK LOADING METHODSPRING
END ITEM IDENTIFICATIONNIMITZ CLASS CVN
MOUNTING POSITIONHORIZONTAL
THREAD CLASS3B ALL ENDS
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
MATERIALCOPPER ALLOY BODY
CONNECTION STYLEGASKET SEAL (BOSS) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
691CInterchangeable
interchangeable cross-reference
interchangeable
6411Interchangeable
interchangeable cross-reference
interchangeable
6401Interchangeable
interchangeable cross-reference
interchangeable
E59-0001-010Interchangeable
interchangeable cross-reference
interchangeable
51306Interchangeable
interchangeable cross-reference
interchangeable
61306Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6401B-01?
6401B-01 is a VALVE,CHECK.
What parts can replace 6401B-01?
There are 22 known substitutes for 6401B-01: 691C, 6411, 6401 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6401B-01?
6401B-01 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-415-1013. 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