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674J654PC79 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

674J654PC79: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL BODY, seat_radius: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, flange_diameter: 1.480 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, under_flange_height: 0.501 INCHES NOMINAL IN, body_inside_diameter: 0.578 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-678-2828, 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
674J654PC79
NSN: 4820-00-678-2828
FSC: 4820 — Valves, Nonpowered
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialSTEEL BODY
seat_radius0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
flange_diameter1.480 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
under_flange_height0.501 INCHES NOMINAL IN
body_inside_diameter0.578 INCHES NOMINAL IN
taper_major_diameter0.578 INCHES NOMINAL IN
taper_minor_diameter0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
body_outside_diameter1.047 INCHES MINIMUM AND 1.048 INCHES MAXIMUM IN
seating_surface_shapeRADIAL
seal_accommodation_typeGROOVED
flange_seat_to_disk_end_height0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN
NSN4820-00-678-2828
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 674J654PC79 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 1.480 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 1.047 INCHES MINIMUM AND 1.048 INCHES MAXIMUM IN
•
SEAL ACCOMMODATION TYPE: GROOVED
•
TAPER MINOR DIAMETER: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN
FLANGE DIAMETER1.480 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER1.047 INCHES MINIMUM AND 1.048 INCHES MAXIMUM IN
SEAL ACCOMMODATION TYPEGROOVED
TAPER MINOR DIAMETER0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY
TAPER MAJOR DIAMETER0.578 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.578 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 3
1JC8956-14Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1JH5052PC44Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
906J007PC52Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 674J654PC79?
674J654PC79 is a SEAT,VALVE.
What parts can replace 674J654PC79?
There are 3 known substitutes for 674J654PC79: 1JC8956-14, 1JH5052PC44, 906J007PC52. Substitute compatibility should be verified for your specific system.
What is the NSN for 674J654PC79?
674J654PC79 is cataloged in the U.S. Government catalog under NSN 4820-00-678-2828. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.