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Technical Data Sheet

SMF3/4BK1 — BUTTON,PLUG

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SMF3/4BK1: BUTTON,PLUG.

The BUTTON,PLUG is a the manufacturer industrial component. Key specifications include overall_height: 0.290 INCHES NOMINAL IN, head_outside_diameter: 1.060 INCHES NOMINAL IN, bottom_outside_diameter: 0.790 INCHES NOMINAL IN, hole_accommodation_diameter: 0.74 INCHES MINIMUM AND 0.77 INCHES MAXIMUM IN, material_accommodated_thickness: 0.03 INCHES MINIMUM AND 0.11 INCHES MAXIMUM IN, part_name_assigned_by_controlling_agency: CLOSURE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-652-6725, 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
SMF3/4BK1
NSN: 5340-01-652-6725
FSC: 5340 — Hardware, Commercial
CAGE: 0N8C1 — MOCAP INC (USA)
SPECIFICATIONS
overall_height0.290 INCHES NOMINAL IN
head_outside_diameter1.060 INCHES NOMINAL IN
bottom_outside_diameter0.790 INCHES NOMINAL IN
hole_accommodation_diameter0.74 INCHES MINIMUM AND 0.77 INCHES MAXIMUM IN
material_accommodated_thickness0.03 INCHES MINIMUM AND 0.11 INCHES MAXIMUM IN
part_name_assigned_by_controlling_agencyCLOSURE
NSN5340-01-652-6725
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SMF3/4BK1 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
•
HOLE ACCOMMODATION DIAMETER: 0.74 INCHES MINIMUM AND 0.77 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.03 INCHES MINIMUM AND 0.11 INCHES MAXIMUM IN
•
BOTTOM OUTSIDE DIAMETER: 0.790 INCHES NOMINAL IN
•
HEAD OUTSIDE DIAMETER: 1.060 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.290 INCHES NOMINAL IN
HOLE ACCOMMODATION DIAMETER0.74 INCHES MINIMUM AND 0.77 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.03 INCHES MINIMUM AND 0.11 INCHES MAXIMUM IN
BOTTOM OUTSIDE DIAMETER0.790 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCLOSURE
HEAD OUTSIDE DIAMETER1.060 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
21478204Reference document
Same NSN cross-reference
Reference document — Secondary reference
7421478204Same 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 SMF3/4BK1?
SMF3/4BK1 is a BUTTON,PLUG.
What parts can replace SMF3/4BK1?
There are 2 known substitutes for SMF3/4BK1: 21478204, 7421478204. Substitute compatibility should be verified for your specific system.
What is the NSN for SMF3/4BK1?
SMF3/4BK1 is cataloged in the U.S. Government catalog under NSN 5340-01-652-6725. This indicates validated use in U.S. government and defense supply chains.
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