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66-8051 — SUPPORT,STRUCTURAL COMPONENT,AIR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

66-8051: SUPPORT,STRUCTURAL COMPONENT,AIR.

SUPPORT,STRUCTURAL COMPONENT,AIR. Key specifications include height: 0.375 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, inside_diameter: 1.147 INCHES NOMINAL IN, outside_diameter: 1.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-016-1070, 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
66-8051
NSN: 4820-00-016-1070
NIINs: 000161070, 011377091
FSC: 4820 — Valves, Nonpowered
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
height0.375 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
inside_diameter1.147 INCHES NOMINAL IN
outside_diameter1.625 INCHES NOMINAL IN
NSN4820-00-016-1070
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 66-8051 · 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
•
FLOW CONTROL DEVICE: POPPET
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED
•
CONNECTION STYLE: GASKET SEAL(BOSS) FIRST END
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STYLE DESIGNATOR: STRAIGHT THRU
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
FEATURES PROVIDED: PRESSURE TIGHT OUTLET SIDE
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
NOMINAL THREAD SIZE: 0.750 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPOPPET
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED
CONNECTION STYLEGASKET SEAL(BOSS) FIRST END
STYLE DESIGNATORSTRAIGHT THRU
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
FEATURES PROVIDEDPRESSURE TIGHT OUTLET SIDE
THREAD DIRECTIONRIGHT-HAND FIRST END
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
MAXIMUM OPERATING TEMP160.0 FAHRENHEIT SINGLE RESPONSE DEGF
DISK LOADING METHODSPRING
SUBSTITUTES & CROSS-REFERENCES 2
3058430-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1008520-6Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 66-8051?
66-8051 is a SUPPORT,STRUCTURAL COMPONENT,AIR.
What parts can replace 66-8051?
There are 2 known substitutes for 66-8051: 3058430-1, 1008520-6. Substitute compatibility should be verified for your specific system.
What is the NSN for 66-8051?
66-8051 is cataloged in the U.S. Government catalog under NSN 4820-00-016-1070. 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.