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AT187021 — VALVE,FLOW CONTROL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

AT187021: VALVE,FLOW CONTROL.

The VALVE,FLOW CONTROL is a the manufacturer industrial component. Key specifications include special_features: SERVICE BRAKE VALVE FOR SERVICE BRAKE PEDAL AND VALVE SECTION, valve_operation_method: HYDRAULIC AND MANUAL, end_item_identification: MODEL 672D MOTOR GRADER; BRAKES GROUP, part_name_assigned_by_controlling_agency: MANUAL HYDRAULIC VALVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-540-1925, 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
AT187021
NSN: 4820-01-540-1925
FSC: 4820 — Valves, Nonpowered
CAGE: ZB955 — RDO EQUIPMENT RDO EQUIPMENT PTY LTD (AUS)
SPECIFICATIONS
special_featuresSERVICE BRAKE VALVE FOR SERVICE BRAKE PEDAL AND VALVE SECTION
valve_operation_methodHYDRAULIC AND MANUAL
end_item_identificationMODEL 672D MOTOR GRADER; BRAKES GROUP
part_name_assigned_by_controlling_agencyMANUAL HYDRAULIC VALVE
NSN4820-01-540-1925
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: AT187021 · 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 OPERATION METHOD: HYDRAULIC AND MANUAL
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSERVICE BRAKE VALVE FOR SERVICE BRAKE PEDAL AND VALVE SECTION
PART NAME ASSIGNED BY CONTROLLING AGENCYMANUAL HYDRAULIC VALVE
END ITEM IDENTIFICATIONMODEL 672D MOTOR GRADER; BRAKES GROUP
VALVE OPERATION METHODHYDRAULIC AND MANUAL
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 1
AT329753Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT187021?
AT187021 is a VALVE,FLOW CONTROL.
What parts can replace AT187021?
There is 1 known substitute for AT187021: AT329753. Substitute compatibility should be verified for your specific system.
What is the NSN for AT187021?
AT187021 is cataloged in the U.S. Government catalog under NSN 4820-01-540-1925. 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.