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Technical Data Sheet
PartsTable / COMPONENT / AP-78D
AP-78D ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The CAP SCREW,VALVE CON is a the manufacturer industrial component. Key specifications include material: CARBIDE OVERALL, flute_length: 0.866 INCHES NOMINAL IN, overall_length: 2.165 INCHES NOMINAL IN, nominal_cutting_diameter: 0.1654 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-186-0511, 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
AP-78D
NSN: 4820-01-186-0511
FSC: 4820
CAGE: 43528 — HOFFMAN/NEW YORKER INC (USA)
SPECIFICATIONS
materialCARBIDE OVERALL
flute_length0.866 INCHES NOMINAL IN
overall_length2.165 INCHES NOMINAL IN
nominal_cutting_diameter0.1654 INCHES IN
NSN4820-01-186-0511
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: AP-78D · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
0463Interchangeable
interchangeable cross-reference
interchangeable
21410CInterchangeable
interchangeable cross-reference
interchangeable
1980Interchangeable
interchangeable cross-reference
interchangeable
RKS10KInterchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-22/8Interchangeable
interchangeable cross-reference
interchangeable
10135213Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AP-78D?
AP-78D is a CAP SCREW,VALVE CON.
What parts can replace AP-78D?
There are 12 known substitutes for AP-78D: 0463, 21410C, 1980 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AP-78D?
AP-78D is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-186-0511. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026