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6409985-1 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6409985-1: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 1.000 INCHES NOMINAL IN, material: ALUMINUM ALLOY 2024 AND STEEL COMP 302 OR STEEL COMP 304 OVERALL, thread_length: 0.276 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, special_features: INCLUDES 2 INSERTS, style_designator: LEFT INTERNAL THREAD, surface_treatment: CHROMATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-277-2465, 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
6409985-1
NSN: 5340-01-277-2465
FSC: 5340 — Hardware, Commercial
CAGE: 55974 — HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS FORMER TEST SYSTEMS DIV (USA)
SPECIFICATIONS
length1.000 INCHES NOMINAL IN
materialALUMINUM ALLOY 2024 AND STEEL COMP 302 OR STEEL COMP 304 OVERALL
thread_length0.276 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
special_featuresINCLUDES 2 INSERTS
style_designatorLEFT INTERNAL THREAD
surface_treatmentCHROMATE OVERALL
width_across_flats0.437 INCHES NOMINAL IN
cross-sectional_shapeHEXAGON
distance_from_end_to_hole_center0.250 INCHES NOMINAL IN
hole_quantity_perpendicular_to_axis1
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE AND AISI 302 ASSN STD 2ND MATERIAL RESPONSE OR AISI 304 ASSN STD 3RD MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A
NSN5340-01-277-2465
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6409985-1 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
•
WIDTH ACROSS FLATS: 0.437 INCHES NOMINAL IN
•
LENGTH: 1.000 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A
•
THREAD LENGTH: 0.276 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
•
STYLE DESIGNATOR: LEFT INTERNAL THREAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE AND AISI 302 ASSN STD 2ND MATERIAL RESPONSE OR AISI 304 ASSN STD 3RD MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.437 INCHES NOMINAL IN
LENGTH1.000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A
THREAD LENGTH0.276 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
STYLE DESIGNATORLEFT INTERNAL THREAD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE AND AISI 302 ASSN STD 2ND MATERIAL RESPONSE OR AISI 304 ASSN STD 3RD MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPEHEXAGON
SPECIAL FEATURESINCLUDES 2 INSERTS
SURFACE TREATMENTCHROMATE OVERALL
DISTANCE FROM END TO HOLE CENTER0.250 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

No substitute or cross-reference records for this part.

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 6409985-1?
6409985-1 is a STANDOFF,THREADED,SPACING.
What is the NSN for 6409985-1?
6409985-1 is cataloged in the U.S. Government catalog under NSN 5340-01-277-2465. 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.