PartsTable
Technical Data Sheet
Download PDF

N-492904 — DIAPHRAGM,ACTUATOR VALVE,SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

N-492904: DIAPHRAGM,ACTUATOR VALVE,SPECIAL.

DIAPHRAGM,ACTUATOR VALVE,SPECIAL. Key specifications include material: COPPER ALLOY, bead_diameter: 1.200 INCHES NOMINAL IN, outside_diameter: 2.105 INCHES NOMINAL IN, style_designator: SPECIAL SHAPED, attachment_method: BOLTS, material_thickness: 0.020 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-172-6557, 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
N-492904
NSN: 4820-01-172-6557
NIINs: 011726557, 011842185, 011842186
FSC: 4820 — Valves, Nonpowered
CAGE: 24821 — ROSEMOUNT ANALYTICAL, INC. DIV PROCESS ANALYTICAL DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY
bead_diameter1.200 INCHES NOMINAL IN
outside_diameter2.105 INCHES NOMINAL IN
style_designatorSPECIAL SHAPED
attachment_methodBOLTS
material_thickness0.020 INCHES NOMINAL IN
center_hole_diameter0.500 INCHES NOMINAL IN
valve_type_for_which_designedAIR PRESSURE RELAY
material_document_and_classificationMIL-B-16444 MIL SPEC SINGLE MATERIAL RESPONSE
general_characteristics_item_descriptionBRONZE
NSN4820-01-172-6557
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N-492904 · 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
•
BEAD DIAMETER: 1.200 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.105 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.500 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
BEAD DIAMETER1.200 INCHES NOMINAL IN
OUTSIDE DIAMETER2.105 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.500 INCHES NOMINAL IN
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 3
M-163005Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
DRWN-556667 PIECE3Reference document
Same NSN cross-reference
Reference document — Secondary reference
N-492904 ITEM 1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy N-492904?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is N-492904?
N-492904 is a DIAPHRAGM,ACTUATOR VALVE,SPECIAL.
What parts can replace N-492904?
There are 3 known substitutes for N-492904: M-163005, DRWN-556667 PIECE3, N-492904 ITEM 1. Substitute compatibility should be verified for your specific system.
What is the NSN for N-492904?
N-492904 is cataloged in the U.S. Government catalog under NSN 4820-01-172-6557. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — N-492904

✓ 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.