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AAB 645 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AAB 645: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 3.0 MILLIMETERS NOMINAL MM, material: STEEL OVERALL, special_features: CARBON STEEL; BROACHING-TYPE STA ND-OFF, style_designator: PROJECTION ONE END, nominal_thread_size: 3.0 MILLIMETERS LEFT INTERNAL (INCLUDES THRU THREAD) MM, cross-sectional_shape: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-477-6887, 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
AAB 645
NSN: 5340-01-477-6887
FSC: 5340 — Hardware, Commercial
CAGE: K1066 — LEONARDO UK LTD (GBR)
SPECIFICATIONS
length3.0 MILLIMETERS NOMINAL MM
materialSTEEL OVERALL
special_featuresCARBON STEEL; BROACHING-TYPE STA ND-OFF
style_designatorPROJECTION ONE END
nominal_thread_size3.0 MILLIMETERS LEFT INTERNAL (INCLUDES THRU THREAD) MM
cross-sectional_shapeROUND
end_item_identificationTOWED RADAR DECOY
right_projection_length1.5 MILLIMETERS MAXIMUM MM
thread_series_designatorM LEFT INTERNAL (INCLUDES THRU THREAD)
right_projection_diameter4.5 MILLIMETERS NOMINAL MM
NSN5340-01-477-6887
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AAB 645 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
•
LENGTH: 3.0 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: PROJECTION ONE END
•
NOMINAL THREAD SIZE: 3.0 MILLIMETERS LEFT INTERNAL (INCLUDES THRU THREAD) MM
•
CROSS-SECTIONAL SHAPE: ROUND
•
MATERIAL: STEEL OVERALL
•
RIGHT PROJECTION DIAMETER: 4.5 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
LENGTH3.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORPROJECTION ONE END
NOMINAL THREAD SIZE3.0 MILLIMETERS LEFT INTERNAL (INCLUDES THRU THREAD) MM
CROSS-SECTIONAL SHAPEROUND
SPECIAL FEATURESCARBON STEEL; BROACHING-TYPE STA ND-OFF
END ITEM IDENTIFICATIONTOWED RADAR DECOY
MATERIALSTEEL OVERALL
RIGHT PROJECTION DIAMETER4.5 MILLIMETERS NOMINAL MM
THREAD SERIES DESIGNATORM LEFT INTERNAL (INCLUDES THRU THREAD)
RIGHT PROJECTION LENGTH1.5 MILLIMETERS MAXIMUM MM
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AAB 645?
AAB 645 is a STANDOFF,THREADED,SPACING.
What is the NSN for AAB 645?
AAB 645 is cataloged in the U.S. Government catalog under NSN 5340-01-477-6887. 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.