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A3187A — FILTER,RADIO FREQUENCY INTERFERE

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

A3187A: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL COMP 1137 OVERALL, body_width: 2.000 INCHES NOMINAL IN, end_radius: 0.344 INCHES NOMINAL IN, fork_depth: 0.531 INCHES NOMINAL IN, body_height: 2.000 INCHES NOMINAL IN, body_length: 2.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-316-5054, 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→ A3187A
NSN: 5340-00-316-5054
NIINs: 003165054, 010911868, 014509313
FSC: 5340 — Hardware, Commercial
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL COMP 1137 OVERALL
body_width2.000 INCHES NOMINAL IN
end_radius0.344 INCHES NOMINAL IN
fork_depth0.531 INCHES NOMINAL IN
body_height2.000 INCHES NOMINAL IN
body_length2.500 INCHES NOMINAL IN
thread_class3A ROD CONNECTION A
body_materialMETAL
hole_diameter0.328 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
overall_width0.997 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
thread_length1.250 INCHES NOMINAL ROD CONNECTION IN
inclosure_typeENCASED
NSN5340-00-316-5054
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A3187A 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
•
END RADIUS: 0.344 INCHES NOMINAL IN
•
THREAD LENGTH: 1.250 INCHES NOMINAL ROD CONNECTION IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI/SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND ROD CONNECTION
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
END RADIUS0.344 INCHES NOMINAL IN
THREAD LENGTH1.250 INCHES NOMINAL ROD CONNECTION IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI/SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL WIDTH0.997 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND ROD CONNECTION
NOMINAL THREAD SIZE0.375 INCHES ROD CONNECTION IN
THREAD CLASS3A ROD CONNECTION A
SUBSTITUTES & CROSS-REFERENCES 10
N1072PCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
X8840APCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
14247PCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MG150APCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
20555PCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
X9053PCA3187Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A3187A?
A3187A is a FILTER,RADIO FREQUENCY INTERFERE. It is classified as a MRO (MRO_GENERAL).
What parts can replace A3187A?
There are 10 known substitutes for A3187A: N1072PCA3187, X8840APCA3187, 14247PCA3187 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A3187A?
A3187A is cataloged in the U.S. Government catalog under NSN 5340-00-316-5054. 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.