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Technical Data Sheet
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20561-2 — BLOCK,MOUNTING

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

20561-2: BLOCK,MOUNTING.

The BLOCK,MOUNTING is a the manufacturer industrial component. Key specifications include end_item_identification: M1 TANK. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-138-2081, 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
20561-2
NSN: 4820-00-138-2081
NIINs: 001382081, 001857388, 012311664
FSC: 4820 — Valves, Nonpowered
CAGE: 05842 — DYNEX/RIVETT INC. (USA)
SPECIFICATIONS
end_item_identificationM1 TANK
NSN4820-00-138-2081
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20561-2 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,AISI 52100,ROCKWELL C SCALE 58-62 HARDNESS,0.370 IN. DIA,0.250 IN. TAPER 0.100/FT TO SHARP CORNER,1.063 IN. LG IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,AISI 52100,ROCKWELL C SCALE 58-62 HARDNESS,0.370 IN. DIA,0.250 IN. TAPER 0.100/FT TO SHARP CORNER,1.063 IN. LG IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 20561-2?
20561-2 is a BLOCK,MOUNTING.
What is the NSN for 20561-2?
20561-2 is cataloged in the U.S. Government catalog under NSN 4820-00-138-2081. This indicates validated use in U.S. government and defense supply chains.
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