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A3187 — COIL,RADIO FREQUENCY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A3187: COIL,RADIO FREQUENCY.

The COIL,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1035 OVERALL, end_radius: 0.344 INCHES NOMINAL IN, fork_depth: 0.594 INCHES NOMINAL IN, body_length: 1.250 INCHES NOMINAL IN, shank_length: 2.000 INCHES NOMINAL IN, thread_class: 3A ROD CONNECTION A. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-499-3459, 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
A3187
NSN: 5340-00-499-3459
NIINs: 004993459, 006019572, 012462421
FSC: 5340 — Hardware, Commercial
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL COMP 1035 OVERALL
end_radius0.344 INCHES NOMINAL IN
fork_depth0.594 INCHES NOMINAL IN
body_length1.250 INCHES NOMINAL IN
shank_length2.000 INCHES NOMINAL IN
thread_class3A ROD CONNECTION A
hole_diameter0.344 INCHES NOMINAL IN
rating_methodWINDING TURNS AND ELECTRICAL SINGLE COMPONENT SINGLE WINDING
thread_length1.250 INCHES NOMINAL ROD CONNECTION IN
turn_quantity41 SINGLE COMPONENT SINGLE WINDING
coil_form_typeHOLLOW SINGLE COMPONENT
inclosure_typeOPEN
NSN5340-00-499-3459
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A3187 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
•
SHANK DIAMETER: 0.373 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
FORK SPAN WIDTH: 0.561 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
•
FORK ARM THICKNESS: 0.214 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.997 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
•
END RADIUS: 0.344 INCHES NOMINAL IN
•
THREAD LENGTH: 1.250 INCHES NOMINAL ROD CONNECTION IN
•
SHANK LENGTH: 2.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CLEVIS
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.373 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
FORK SPAN WIDTH0.561 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
FORK ARM THICKNESS0.214 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
OVERALL DIAMETER0.997 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
END RADIUS0.344 INCHES NOMINAL IN
THREAD LENGTH1.250 INCHES NOMINAL ROD CONNECTION IN
SHANK LENGTH2.000 INCHES NOMINAL IN
STYLE DESIGNATORCLEVIS
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI/SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND ROD CONNECTION
SUBSTITUTES & CROSS-REFERENCES 1
VA3187Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 A3187?
A3187 is a COIL,RADIO FREQUENCY.
What parts can replace A3187?
There is 1 known substitute for A3187: VA3187. Substitute compatibility should be verified for your specific system.
What is the NSN for A3187?
A3187 is cataloged in the U.S. Government catalog under NSN 5340-00-499-3459. 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.