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8521-006-4-031 — CAP,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

8521-006-4-031: CAP,VALVE.

The CAP,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, attachment_method: BOLTS, valve_size_for_which_designed: 2.500 INCHES IN, valve_type_for_which_designed: GLOBE, material_document_and_classification: ASTM A216,COMP D ASSN STD SINGLE MATERIAL RESPONSE, valve_model_number_for_which_designed: 2 2/1 IN. IN.

This part is cataloged in the U.S. Government catalog under NSN 4820-01-278-3640, 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
8521-006-4-031
NSN: 4820-01-278-3640
FSC: 4820 — Valves, Nonpowered
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
materialSTEEL
attachment_methodBOLTS
valve_size_for_which_designed2.500 INCHES IN
valve_type_for_which_designedGLOBE
material_document_and_classificationASTM A216,COMP D ASSN STD SINGLE MATERIAL RESPONSE
valve_model_number_for_which_designed2 2/1 IN. IN
NSN4820-01-278-3640
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8521-006-4-031 · 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
•
VALVE TYPE FOR WHICH DESIGNED: GLOBE
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: 2 2/1 IN. IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A216,COMP D ASSN STD SINGLE MATERIAL RESPONSE
•
VALVE SIZE FOR WHICH DESIGNED: 2.500 INCHES IN
•
MATERIAL: STEEL
•
ATTACHMENT METHOD: BOLTS
TECHNICAL CHARACTERISTICS
VALVE TYPE FOR WHICH DESIGNEDGLOBE
VALVE MODEL NUMBER FOR WHICH DESIGNED2 2/1 IN. IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A216,COMP D ASSN STD SINGLE MATERIAL RESPONSE
VALVE SIZE FOR WHICH DESIGNED2.500 INCHES IN
MATERIALSTEEL
ATTACHMENT METHODBOLTS
SUBSTITUTES & CROSS-REFERENCES 3
73423-32Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
73423-32 PC2 2-1/2INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
73423-32 ITEM 2Same 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 8521-006-4-031?
8521-006-4-031 is a CAP,VALVE.
What parts can replace 8521-006-4-031?
There are 3 known substitutes for 8521-006-4-031: 73423-32, 73423-32 PC2 2-1/2IN, 73423-32 ITEM 2. Substitute compatibility should be verified for your specific system.
What is the NSN for 8521-006-4-031?
8521-006-4-031 is cataloged in the U.S. Government catalog under NSN 4820-01-278-3640. 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.