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E-4558 — VALVE,REGULATING,FLUID PRESSURE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

E-4558: VALVE,REGULATING,FLUID PRESSURE.

VALVE,REGULATING,FLUID PRESSURE. Key specifications include material: COPPER ALLOY BODY, stem_type: RISING, valve_size: 0.250 INCHES IN, bonnet_type: INSIDE SCREW, connection_type: BRAZING, PIPE, features_provided: BONNET PACKING. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-275-2368, 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
E-4558
NSN: 4820-01-275-2368
NIINs: 012752368, 012752369, 012752446
FSC: 4820 — Valves, Nonpowered
CAGE: 07524 — DOVER PUMPS & PROCESS SOLUTIONS SEGMENT INC DBA BLACKMER DIV BLACKMER (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
stem_typeRISING
valve_size0.250 INCHES IN
bonnet_typeINSIDE SCREW
connection_typeBRAZING, PIPE
features_providedBONNET PACKING
valve_operation_methodMANUAL
bonnet_attachment_methodTHREADED
media_for_which_designedWATER, SALT
inlet_relationship_with_outletIDENTICAL
nominal_pipe_size_accommodated1.500 INCHES IN
material_document_and_classificationASTM B164 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE SEAT
NSN4820-01-275-2368
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: E-4558 · 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
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INLET RELATIONSHIP WITH OUTLET: IDENTICAL
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NOMINAL PIPE SIZE ACCOMMODATED: 1.500 INCHES IN
•
STEM TYPE: NONRISING
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CONNECTION TYPE: BRAZING, PIPE
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VALVE SIZE: 1.500 INCHES IN
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BONNET TYPE: INSIDE SCREW
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BONNET ATTACHMENT METHOD: THREADED
•
MATERIAL: NICKEL ALLOY STEM
TECHNICAL CHARACTERISTICS
INLET RELATIONSHIP WITH OUTLETIDENTICAL
NOMINAL PIPE SIZE ACCOMMODATED1.500 INCHES IN
STEM TYPENONRISING
CONNECTION TYPEBRAZING, PIPE
VALVE SIZE1.500 INCHES IN
BONNET TYPEINSIDE SCREW
BONNET ATTACHMENT METHODTHREADED
MATERIALNICKEL ALLOY STEM
MATERIALNICKEL ALLOY SEAT
MATERIALNICKEL ALLOY DISK
SUBSTITUTES & CROSS-REFERENCES 1
E-4558 ITEM NO. 186Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is E-4558?
E-4558 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace E-4558?
There is 1 known substitute for E-4558: E-4558 ITEM NO. 186. Substitute compatibility should be verified for your specific system.
What is the NSN for E-4558?
E-4558 is cataloged in the U.S. Government catalog under NSN 4820-01-275-2368. 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.