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78904 — ADAPTER,STRAIGHT,PIPE TO BOSS

✓ Government record, cited
Hama · GATE VALVE
PRODUCT OVERVIEW

78904: ADAPTER,STRAIGHT,PIPE TO BOSS.

- To connect universal loudspeakers to the loudspeaker cable lead in the car - Makes it easy to install upgrade loudspeakers - Suitable for: - Alfa 33 - Fiat Tempra - Ford Mondeo/Maverick - Lancia Dedra - Nissan all models - Opel Montery - Suzuki (all models) - 2 pieces in blister This part is cataloged in the U.S. Government catalog under NSN 4820-01-126-9941, 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
78904
NSN: 4820-01-126-9941
NIINs: 011269941, 012139873, 016626000
FSC: 4820 — Valves, Nonpowered
CAGE: 09790 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV VALVE & ACTUATOR (USA)
SPECIFICATIONS
materialRUBBER
bead_diameter0.690 INCHES NOMINAL IN
outside_diameter1.375 INCHES NOMINAL IN
special_featuresADDITIONAL MATERIAL: CLOTH
style_designatorSPECIAL SHAPED
material_thickness0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
center_hole_diameter0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
NSN4820-01-126-9941
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 78904 · Hama ⚠ 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
•
BEAD DIAMETER: 0.690 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
MATERIAL THICKNESS: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
BEAD DIAMETER0.690 INCHES NOMINAL IN
OUTSIDE DIAMETER1.375 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
MATERIAL THICKNESS0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
SPECIAL FEATURESADDITIONAL MATERIAL: CLOTH
CENTER HOLE DIAMETER0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 1
78875 PART 78904Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 78904?
78904 is a ADAPTER,STRAIGHT,PIPE TO BOSS manufactured by Hama.
What parts can replace 78904?
There is 1 known substitute for 78904: 78875 PART 78904. Substitute compatibility should be verified for your specific system.
What is the NSN for 78904?
78904 is cataloged in the U.S. Government catalog under NSN 4820-01-126-9941. 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.