PartsTable
Technical Data Sheet
Download PDF

B789 — B789

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

B789: B789.

The B789 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, features_provided: ELECTROSTATIC SENSITIVE, fsc_application_data: VALVE,HYDRAULIC POWER STEERING, seating_surface_shape: FLAT, end_item_identification: AN/UYQ-70(V) ADV DISPLAY SYS N/A FOR COSAL USE, seal_accommodation_type: GROOVED. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-343-5389, 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
MRO→ MRO_GENERAL→ B789
NSN: 4820-00-343-5389
NIINs: 003435389, 015055960
FSC: 4820 — Valves, Nonpowered
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
features_providedELECTROSTATIC SENSITIVE
fsc_application_dataVALVE,HYDRAULIC POWER STEERING
seating_surface_shapeFLAT
end_item_identificationAN/UYQ-70(V) ADV DISPLAY SYS N/A FOR COSAL USE
seal_accommodation_typeGROOVED
material_document_and_classificationMIL-S-6758,C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyINAVY CCA, 100 BASE-SX JUMBO I/O
NSN4820-00-343-5389
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: B789 · 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
•
FSC APPLICATION DATA: VALVE,HYDRAULIC POWER STEERING
•
SEAL ACCOMMODATION TYPE: GROOVED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758,C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 4130 OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAVALVE,HYDRAULIC POWER STEERING
SEAL ACCOMMODATION TYPEGROOVED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758,C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
END ITEM IDENTIFICATIONACFT,TYPE KC-135
MATERIALSTEEL COMP 4130 OVERALL
SEATING SURFACE SHAPEFLAT
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy B789?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is B789?
B789 is a B789. It is classified as a MRO (MRO_GENERAL).
What is the NSN for B789?
B789 is cataloged in the U.S. Government catalog under NSN 4820-00-343-5389. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — B789

✓ 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.