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SS845-2181284 — PACKING NUT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

SS845-2181284: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, seat_angle: 75.0 DEGREES NOMINAL, thread_size: 0.750-20, thread_class: 2A A, thread_length: 0.375 INCHES NOMINAL IN, overall_height: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-066-6555, 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
SS845-2181284
NSN: 4820-01-066-6555
NIINs: 010666555, 010676570, 010679923
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY
seat_angle75.0 DEGREES NOMINAL
thread_size0.750-20
thread_class2A A
thread_length0.375 INCHES NOMINAL IN
overall_height0.625 INCHES NOMINAL IN
overall_length0.469 INCHES NOMINAL IN
shoulder_width0.188 INCHES NOMINAL IN
shoulder_height0.054 INCHES NOMINAL IN
special_featuresW/TWO 0.094 IN. W BY 0.062 IN. DP SLOTS 180 DEG APART ON TOP OF NUT IN
style_designatorPLUG
thread_directionRIGHT-HAND
NSN4820-01-066-6555
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: SS845-2181284 · 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
•
SHOULDER WIDTH: 0.040 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.050 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLUG
•
SEAT ANGLE: 15.0 DEGREES NOMINAL
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 22
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.615 INCHES NOMINAL IN
SHOULDER WIDTH0.040 INCHES NOMINAL IN
SHOULDER HEIGHT0.050 INCHES NOMINAL IN
STYLE DESIGNATORPLUG
SEAT ANGLE15.0 DEGREES NOMINAL
NOMINAL THREAD SIZE0.562 INCHES IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH22
MATERIALNICKEL ALLOY
THREAD SERIES DESIGNATORUNS
SUBSTITUTES & CROSS-REFERENCES 4
2620-925X4Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2620-925X4ASSYB3-INPC17Reference document
Same NSN cross-reference
Reference document — Secondary reference
F-26854-REVC(MONEL)Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SS845-2181284ASSYB3-4INPC17Same 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 SS845-2181284?
SS845-2181284 is a PACKING NUT.
What parts can replace SS845-2181284?
There are 4 known substitutes for SS845-2181284: 2620-925X4, 2620-925X4ASSYB3-INPC17, F-26854-REVC(MONEL) and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SS845-2181284?
SS845-2181284 is cataloged in the U.S. Government catalog under NSN 4820-01-066-6555. 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.