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81FS-END-NBM400-EN — VALVE,ROTARY,SELECTOR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

81FS-END-NBM400-EN: VALVE,ROTARY,SELECTOR.

The VALVE,ROTARY,SELECTOR is a the manufacturer industrial component. Key specifications include flow_type: TWO-WAY, valve_size: 2.000 INCHES IN, body_material: STEEL, connection_type: FLANGE, ROUND W/HOLES, flange_diameter: 6.540 INCHES IN, special_features: MAXIMUM OPERATING PRESSURE 400 BAR. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-631-8341, 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
81FS-END-NBM400-EN
NSN: 4820-01-631-8341
FSC: 4820 — Valves, Nonpowered
CAGE: 53631 — FETTEROLF CORPORATION (USA)
SPECIFICATIONS
flow_typeTWO-WAY
valve_size2.000 INCHES IN
body_materialSTEEL
connection_typeFLANGE, ROUND W/HOLES
flange_diameter6.540 INCHES IN
special_featuresMAXIMUM OPERATING PRESSURE 400 BAR
mounting_facilityINLINE
bolt_hole_quantity2
flange_face_designPLAIN
connection_locationSIDE
connection_quantity2
end_item_identificationV81FS-END-NB
NSN4820-01-631-8341
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 81FS-END-NBM400-EN · 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 FACE DESIGN: PLAIN
•
CONNECTION TYPE: FLANGE, ROUND W/HOLES
•
VALVE SIZE: 2.000 INCHES IN
•
FLOW TYPE: TWO-WAY
•
BODY MATERIAL: STEEL
•
MOUNTING FACILITY: INLINE
•
BOLT HOLE QUANTITY: 2
•
FLANGE DIAMETER: 6.540 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE FACE DESIGNPLAIN
CONNECTION TYPEFLANGE, ROUND W/HOLES
VALVE SIZE2.000 INCHES IN
FLOW TYPETWO-WAY
BODY MATERIALSTEEL
MOUNTING FACILITYINLINE
BOLT HOLE QUANTITY2
FLANGE DIAMETER6.540 INCHES IN
CONNECTION LOCATIONSIDE
SPECIAL FEATURESMAXIMUM OPERATING PRESSURE 400 BAR
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

No substitute or cross-reference records for this part.

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 81FS-END-NBM400-EN?
81FS-END-NBM400-EN is a VALVE,ROTARY,SELECTOR.
What is the NSN for 81FS-END-NBM400-EN?
81FS-END-NBM400-EN is cataloged in the U.S. Government catalog under NSN 4820-01-631-8341. 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.