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39J921PC15 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

39J921PC15: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL BODY, valve_size: 0.500 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: ANGLE FLANGED ENDS, nominal_thickness: 0.562 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-288-7284, 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
39J921PC15
NSN: 4820-00-288-7284
FSC: 4820 — Valves, Nonpowered
CAGE: 90099 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL BODY
valve_size0.500 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorANGLE FLANGED ENDS
nominal_thickness0.562 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designRAISED STRAIGHT ALL ENDS
operating_pressure275.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_deviceDISK
nominal_thread_size0.500 INCHES FIRST END IN
NSN4820-00-288-7284
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 39J921PC15 · 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
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
FLANGE FACE DESIGN: RAISED STRAIGHT ALL ENDS
•
BOLT CIRCLE NOMINAL DIAMETER: 3.125 INCHES ALL ENDS IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
STYLE DESIGNATOR: ANGLE FLANGED ENDS
•
BOLT HOLE NOMINAL DIAMETER: 0.625 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 275.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
FLANGE SHAPEROUND WITH HOLES ALL ENDS
FLANGE FACE DESIGNRAISED STRAIGHT ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER3.125 INCHES ALL ENDS IN
CONNECTION TYPEFLANGE ALL ENDS
STYLE DESIGNATORANGLE FLANGED ENDS
BOLT HOLE NOMINAL DIAMETER0.625 INCHES ALL ENDS IN
OPERATING PRESSURE275.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VALVE SIZE0.500 INCHES IN
ADJUSTABLE PRESSURE RANGE+5.0 TO 9.0 POUNDS PER SQUARE INCH LBS
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 7
A6600Reference document
Same NSN cross-reference
Reference document — Secondary reference
W8453359PC1T014Reference document
Same NSN cross-reference
Reference document — Secondary reference
20138A51SSReference document
Same NSN cross-reference
Reference document — Secondary reference
W6680762PC15Reference document
Same NSN cross-reference
Reference document — Secondary reference
T5599158PC15Reference document
Same NSN cross-reference
Reference document — Secondary reference
39J921PC1T014Reference 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 39J921PC15?
39J921PC15 is a VALVE,SAFETY RELIEF.
What parts can replace 39J921PC15?
There are 7 known substitutes for 39J921PC15: A6600, W8453359PC1T014, 20138A51SS and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 39J921PC15?
39J921PC15 is cataloged in the U.S. Government catalog under NSN 4820-00-288-7284. 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.