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Technical Data Sheet
PartsTable / COMPONENT / N-375-68
N-375-68 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flange_diameter: 0.750 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, seat_angle_in_deg: 30.000 NOMINAL, under_flange_height: 0.750 INCHES NOMINAL IN, body_outside_diameter: 0.621 INCHES MINIMUM AND 0.622 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-067-6517, 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
N-375-68
NSN: 4820-01-067-6517
FSC: 4820
CAGE: 0Y7K2 — CALTAM, INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flange_diameter0.750 INCHES NOMINAL IN
special_featuresONE DRILLED HOLE THRU FLANGE BOTH SIDES,0.250 IN. DIA; 5/16 IN. FROM END OF FLANGE; ONE GROOVE ON BODY PORTION; 0.447 IN. DIA BY 0.172 IN. W; 0.125 IN. FROM END IN
style_designatorPLAIN FLANGED
seat_angle_in_deg30.000 NOMINAL
under_flange_height0.750 INCHES NOMINAL IN
body_outside_diameter0.621 INCHES MINIMUM AND 0.622 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
body_stepped_inside_diameter0.515 INCHES NOMINAL SECOND STEP IN
flange_seat_to_disk_end_height0.625 INCHES NOMINAL IN
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-067-6517
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N-375-68 · 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
•
BODY OUTSIDE DIAMETER: 0.621 INCHES MINIMUM AND 0.622 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SEATING SURFACE SHAPE: ANGULAR
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
FLANGE SEAT TO DISK END HEIGHT: 0.625 INCHES NOMINAL IN
•
BODY STEPPED INSIDE DIAMETER: 0.515 INCHES NOMINAL SECOND STEP IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER0.621 INCHES MINIMUM AND 0.622 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SEATING SURFACE SHAPEANGULAR
STYLE DESIGNATORPLAIN FLANGED
MATERIALSTEEL CORROSION RESISTING OVERALL
FLANGE SEAT TO DISK END HEIGHT0.625 INCHES NOMINAL IN
BODY STEPPED INSIDE DIAMETER0.515 INCHES NOMINAL SECOND STEP IN
SPECIAL FEATURESONE DRILLED HOLE THRU FLANGE BOTH SIDES,0.250 IN. DIA; 5/16 IN. FROM END OF FLANGE; ONE GROOVE ON BODY PORTION; 0.447 IN. DIA BY 0.172 IN. W; 0.125 IN. FROM END IN
BODY STEPPED INSIDE DIAMETER0.250 INCHES NOMINAL FIRST STEP IN
UNDER FLANGE HEIGHT0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
N375Interchangeable
interchangeable cross-reference
interchangeable
N-375-67Interchangeable
interchangeable cross-reference
interchangeable
N375PC67Interchangeable
interchangeable cross-reference
interchangeable
N-375 PIECE 51 AND 52Interchangeable
interchangeable cross-reference
interchangeable
B19332-34Interchangeable
interchangeable cross-reference
interchangeable
21499Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N-375-68?
N-375-68 is a SEAT,VALVE.
What parts can replace N-375-68?
There are 20 known substitutes for N-375-68: N375, N-375-67, N375PC67 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N-375-68?
N-375-68 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-067-6517. 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