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1281-N — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1281-N: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY FLOW CONTROL DEVICE, valve_size: 4.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS, mounting_position: HORIZONTAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-107-2555, 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
1281-N
NSN: 4820-01-107-2555
NIINs: 011072555, 013497227
FSC: 4820 — Valves, Nonpowered
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY FLOW CONTROL DEVICE
valve_size4.000 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
mounting_positionHORIZONTAL
nominal_thickness0.500 INCHES ALL ENDS IN
bolt_hole_quantity8 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
flow_control_deviceDISK
face_to_face_distance11.750 INCHES IN
NSN4820-01-107-2555
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1281-N · 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
•
PRESSURE RATING: 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
OUTSIDE DIAMETER: 4.625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SOLID
•
MEDIA FOR WHICH DESIGNED: GAS OR OIL OR WATER
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
PRESSURE RATING100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
OUTSIDE DIAMETER4.625 INCHES NOMINAL IN
STYLE DESIGNATORSOLID
SPECIAL FEATURESSTEM ATTACHING POST OPPOSITE SEAT SIDE
MEDIA FOR WHICH DESIGNEDGAS OR OIL OR WATER
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
1281N PIECE 4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
3871NSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1281-N?
1281-N is a DISK,VALVE.
What parts can replace 1281-N?
There are 2 known substitutes for 1281-N: 1281N PIECE 4, 3871N. Substitute compatibility should be verified for your specific system.
What is the NSN for 1281-N?
1281-N is cataloged in the U.S. Government catalog under NSN 4820-01-107-2555. 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.