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1281-001 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1281-001: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, valve_size: 5.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS, nominal_thickness: 0.562 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-384-6438, 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
1281-001
NSN: 4820-01-384-6438
NIINs: 013846438, 014532158, 014532164, 015299355
FSC: 4820 — Valves, Nonpowered
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
valve_size5.000 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
nominal_thickness0.562 INCHES ALL ENDS IN
bolt_hole_quantity10 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodWEIGHT
flow_control_deviceDISK
face_to_face_distance13.125 INCHES IN
NSN4820-01-384-6438
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1281-001 · 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
•
SHANK DIAMETER: 1.625 INCHES NOMINAL IN
•
FLANGE SEAT TO DISK END HEIGHT: 2.750 INCHES NOMINAL IN
•
PRESSURE RATING: 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
OUTSIDE DIAMETER: 9.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SWING CHECK
•
MEDIA FOR WHICH DESIGNED: WATER OR OIL
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
SHANK DIAMETER1.625 INCHES NOMINAL IN
FLANGE SEAT TO DISK END HEIGHT2.750 INCHES NOMINAL IN
PRESSURE RATING100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
OUTSIDE DIAMETER9.250 INCHES NOMINAL IN
STYLE DESIGNATORSWING CHECK
MEDIA FOR WHICH DESIGNEDWATER OR OIL
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
38231-UReference document
Same NSN cross-reference
Reference document — Design control — primary reference
1281-001 ITEM 4 8INSame 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 1281-001?
1281-001 is a VALVE,CHECK.
What parts can replace 1281-001?
There are 2 known substitutes for 1281-001: 38231-U, 1281-001 ITEM 4 8IN. Substitute compatibility should be verified for your specific system.
What is the NSN for 1281-001?
1281-001 is cataloged in the U.S. Government catalog under NSN 4820-01-384-6438. 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.