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PartsTable / COMPONENT / 26N77-100 ITEM 28
26N77-100 ITEM 28 ✓ 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 DISK STEM RING,VALV is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.770 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_length: 4.120 INCHES NOMINAL IN, flange_diameter: 4.910 INCHES NOMINAL IN, inside_diameter: 1.218 INCHES MAXIMUM 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 4820-01-216-9271, 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
26N77-100 ITEM 28
NSN: 4820-01-216-9271
FSC: 4820
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.770 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_length4.120 INCHES NOMINAL IN
flange_diameter4.910 INCHES NOMINAL IN
inside_diameter1.218 INCHES MAXIMUM IN
outside_diameter2.880 INCHES MAXIMUM IN
style_designatorTHREADED FLANGED
seat_angle_in_deg30.000 NOMINAL
component_quantity2
nominal_thread_size3.459 INCHES SINGLE THREADED PORTION IN
under_flange_height0.770 INCHES NOMINAL IN
NSN4820-01-216-9271
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 26N77-100 ITEM 28 · 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 21
2620-920X12ASSY11APC4Interchangeable
interchangeable cross-reference
interchangeable
845-2181282-3INInterchangeable
interchangeable cross-reference
interchangeable
845-2445066 ITEM 19Interchangeable
interchangeable cross-reference
interchangeable
26M77-100-PC21Interchangeable
interchangeable cross-reference
interchangeable
845-2445066Interchangeable
interchangeable cross-reference
interchangeable
26M77-100 ITEM 21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26N77-100 ITEM 28?
26N77-100 ITEM 28 is a DISK STEM RING,VALV.
What parts can replace 26N77-100 ITEM 28?
There are 21 known substitutes for 26N77-100 ITEM 28: 2620-920X12ASSY11APC4, 845-2181282-3IN, 845-2445066 ITEM 19 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26N77-100 ITEM 28?
26N77-100 ITEM 28 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-216-9271. 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