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540-9254-003 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

540-9254-003: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.625 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6063 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2011 OVERALL, special_features: BOTH ENDS COUNTERSUNK SIXTY DEGREES,0.175 IN. MIN.

0.190 IN. MAX. DIA IN, style_designator: INTERNALLY THREADED FULL LENGTH, surface_treatment: CHROMATE OVERALL, width_across_flats: 0.250 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-156-8015, 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
540-9254-003
NSN: 5340-01-156-8015
FSC: 5340 — Hardware, Commercial
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
length0.625 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6063 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2011 OVERALL
special_featuresBOTH ENDS COUNTERSUNK SIXTY DEGREES,0.175 IN. MIN. 0.190 IN. MAX. DIA IN
style_designatorINTERNALLY THREADED FULL LENGTH
surface_treatmentCHROMATE OVERALL
width_across_flats0.250 INCHES NOMINAL IN
cross-sectional_shapeHEXAGON
surface_treatment_document_and_classificationMIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5340-01-156-8015
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 540-9254-003 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: 0.250 INCHES NOMINAL IN
•
LENGTH: 0.625 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: INTERNALLY THREADED FULL LENGTH
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/8 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-200/9 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-225/8 FED SPEC 4TH MATERIAL RESPONSE OR QQ-A-225/3 FED SPEC 5TH MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE: HEXAGON
•
SURFACE TREATMENT: CHROMATE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
LENGTH0.625 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORINTERNALLY THREADED FULL LENGTH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/8 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-200/9 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-225/8 FED SPEC 4TH MATERIAL RESPONSE OR QQ-A-225/3 FED SPEC 5TH MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPEHEXAGON
SPECIAL FEATURESBOTH ENDS COUNTERSUNK SIXTY DEGREES,0.175 IN. MIN. 0.190 IN. MAX. DIA IN
SURFACE TREATMENTCHROMATE OVERALL
MATERIALALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6063 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2011 OVERALL
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 1
8217-A-0832-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 540-9254-003?
540-9254-003 is a STANDOFF,THREADED,SPACING.
What parts can replace 540-9254-003?
There is 1 known substitute for 540-9254-003: 8217-A-0832-16. Substitute compatibility should be verified for your specific system.
What is the NSN for 540-9254-003?
540-9254-003 is cataloged in the U.S. Government catalog under NSN 5340-01-156-8015. 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.