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51D56 — HOUSING,LOWER,VALVE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

51D56: HOUSING,LOWER,VALVE.

The HOUSING,LOWER,VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: 2.810 IN. W ACROSS FLATS; 1.128 IN.

H; 4 MTG HOLES; ALUMINUMALLOY QQ-A-22518 TEMPER T6 IN. This part is cataloged in the U.S. Government catalog under NSN 1660-00-166-6466, 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
51D56
NSN: 1660-00-166-6466
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)
SPECIFICATIONS
general_characteristics_item_description2.810 IN. W ACROSS FLATS; 1.128 IN. H; 4 MTG HOLES; ALUMINUMALLOY QQ-A-22518 TEMPER T6 IN
NSN1660-00-166-6466
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HOUSING,LOWER,VALVE TITLE COMPONENT PN 51D56 MFR HOUSING,LOWER,VALVE
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 2.810 IN. W ACROSS FLATS; 1.128 IN. H; 4 MTG HOLES; ALUMINUMALLOY QQ-A-22518 TEMPER T6 IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTION2.810 IN. W ACROSS FLATS; 1.128 IN. H; 4 MTG HOLES; ALUMINUMALLOY QQ-A-22518 TEMPER T6 IN
OTHER ITEMS IN FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1660-00-006-4472 1660-00-009-5646 1660-00-019-8389 1660-00-019-8399 1660-00-031-5285 1660-00-302-4390 1660-00-441-0575 1660-01-601-0729
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)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 51D56?
51D56 is a HOUSING,LOWER,VALVE.
What is the NSN for 51D56?
51D56 is cataloged in the U.S. Government catalog under NSN 1660-00-166-6466. 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.