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54-A/PC20 — Technical Data Sheet

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— · 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 COCK,SHUTOFF,SCREW STEM is a the manufacturer industrial component. Key specifications include special_features: OUTLET 0.375 IN. N.P.T.; NAVAL BRASS ASTM B 21 B IN, criticality_code_justification: ZZZY.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System under NSN 4820-01-243-5841, 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
54-A/PC20
NSN: 4820-01-243-5841
FSC: 4820
CAGE: 20969 — ESSEX BRASS CORPORATION (USA)
SPECIFICATIONS
special_featuresOUTLET 0.375 IN. N.P.T.; NAVAL BRASS ASTM B 21 B IN
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN4820-01-243-5841
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 54-A/PC20 · 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
CRITICALITY CODE JUSTIFICATION: ZZZY
TECHNICAL CHARACTERISTICS
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
SPECIAL FEATURESOUTLET 0.375 IN. N.P.T.; NAVAL BRASS ASTM B 21 B IN
CRITICALITY CODE JUSTIFICATIONZZZY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
43107-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
43107-2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MD3051InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
EC-53InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
DC53InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 54-A/PC20?
54-A/PC20 is a COCK,SHUTOFF,SCREW STEM.
What parts can replace 54-A/PC20?
There are 5 known substitutes for 54-A/PC20: 43107-1, 43107-2, MD3051 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 54-A/PC20?
54-A/PC20 is cataloged in the Federal Logistics Information System under NSN 4820-01-243-5841. 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: October 2026