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A3788 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A3788: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, first_end_style: CHAMFERED, pin_overall_length: 1.750 INCHES NOMINAL IN, first_hole_diameter: 0.140 INCHES NOMINAL IN, pin_overall_diameter: 0.5000 INCHES NOMINAL IN, second_hole_diameter: 0.140 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-499-3480, 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
A3788
NSN: 5330-00-499-3480
NIINs: 004993480, 006194257
FSC: 5330 — Packing and Gasket Materials
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
first_end_styleCHAMFERED
pin_overall_length1.750 INCHES NOMINAL IN
first_hole_diameter0.140 INCHES NOMINAL IN
pin_overall_diameter0.5000 INCHES NOMINAL IN
second_hole_diameter0.140 INCHES NOMINAL IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.031 INCHES NOMINAL IN
hole_arrangement_styleBOTH END DRILLED
second_end_relationship_with_first_endIDENTICAL
center_to_center_distance_between_holes1.375 INCHES NOMINAL IN
distance_from_centerline_of_hole_to_end_of_pin0.187 INCHES NOMINAL IN
NSN5330-00-499-3480
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A3788 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
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SUPPLEMENTARY FEATURES: CROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
TECHNICAL CHARACTERISTICS
SUPPLEMENTARY FEATURESCROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
SPECIAL FEATURESSTYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200
SUBSTITUTES & CROSS-REFERENCES 3
5164550Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
K-5164550Reference document
Same NSN cross-reference
Reference document — Secondary reference
A3708Same 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 A3788?
A3788 is a GASKET.
What parts can replace A3788?
There are 3 known substitutes for A3788: 5164550, K-5164550, A3708. Substitute compatibility should be verified for your specific system.
What is the NSN for A3788?
A3788 is cataloged in the U.S. Government catalog under NSN 5330-00-499-3480. 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.