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Technical Data Sheet
PartsTable / COMPONENT / 71997-3 AND 71997-20
71997-3 AND 71997-20 ✓ 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 CAM,PROPELLER,AIRCRAFT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 937 OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 0.3800 INCHES MINIMUM AND 0.4000 INCHES MAXIMUM IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.4600 INCHES MINIMUM AND 0.4800 INCHES MAXIMUM IN, body_outside_diameter: 0.5645 INCHES MINIMUM AND 0.5655 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 4820-01-300-8844, 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
71997-3 AND 71997-20
NSN: 4820-01-300-8844
FSC: 4820
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY 937 OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length0.3800 INCHES MINIMUM AND 0.4000 INCHES MAXIMUM IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.4600 INCHES MINIMUM AND 0.4800 INCHES MAXIMUM IN
body_outside_diameter0.5645 INCHES MINIMUM AND 0.5655 INCHES MAXIMUM IN
material_document_and_classificationAMS 4842 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-300-8844
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 71997-3 AND 71997-20 · 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 5
72158Interchangeable
interchangeable cross-reference
interchangeable
133093R1Interchangeable
interchangeable cross-reference
interchangeable
1820923C2Interchangeable
interchangeable cross-reference
interchangeable
38763HAInterchangeable
interchangeable cross-reference
interchangeable
B72-158Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 71997-3 AND 71997-20?
71997-3 AND 71997-20 is a CAM,PROPELLER,AIRCRAFT.
What parts can replace 71997-3 AND 71997-20?
There are 5 known substitutes for 71997-3 AND 71997-20: 72158, 133093R1, 1820923C2 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 71997-3 AND 71997-20?
71997-3 AND 71997-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-300-8844. 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