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178166 — COVER,SEAT,VEHICULAR

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

178166: COVER,SEAT,VEHICULAR.

The COVER,SEAT,VEHICULAR is a the manufacturer industrial component. Key specifications include length: 0.318 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN, material: STEEL COMP 416, design_type: TUBULAR, thread_length: 0.120 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNS LOCATION NOT OTHERWISE SPECIFIED, orifice_diameter: 0.006 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-780-5851, 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
178166
NSN: 4730-00-780-5851
NIINs: 007805851, 015293828
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 19156 — MOOG INC DIV MOOG INC., SPACE AND DEFENSE - SALT LAKE CITY (USA)
SPECIFICATIONS
length0.318 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
materialSTEEL COMP 416
design_typeTUBULAR
thread_length0.120 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNS LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.006 INCHES NOMINAL IN
outside_diameter0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
special_featuresFURNISHED IN MATCHED SETS OF 2
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
thread_pitch_diameters+0.0465 TO 0.0514 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
thread_size_designator0-80 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-00-780-5851
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 178166 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LENGTH: 0.318 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR
•
THREAD SERIES: UNS LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.120 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
THREAD PITCH DIAMETERS: +0.0465 TO 0.0514 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763, CLASS 416 FED SPEC SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
LENGTH0.318 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR
THREAD SERIESUNS LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.120 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
THREAD PITCH DIAMETERS+0.0465 TO 0.0514 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763, CLASS 416 FED SPEC SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR0-80 LOCATION NOT OTHERWISE SPECIFIED
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 178166?
178166 is a COVER,SEAT,VEHICULAR.
What is the NSN for 178166?
178166 is cataloged in the U.S. Government catalog under NSN 4730-00-780-5851. 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.