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642AS4190 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

642AS4190: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.550 INCHES NOMINAL0.550 INCHES NOMINAL IN, material: ALUMINUM ALLOY STANDOFFALUMINUM ALLOY STANDOFF, thread_class: 2A RIGHT EXTERNAL2A RIGHT EXTERNAL A, thread_length: 0.140 INCHES NOMINAL RIGHT EXTERNAL0.140 INCHES NOMINAL RIGHT EXTERNAL IN, flange_thickness: 0.357 INCHES MINIMUM AND 0.357 INCHES MINIMUM AND 0.363 INCHES MAXIMUM0.363 INCHES MAXIMUM IN, style_designator: FLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-076-5763, 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
642AS4190
NSN: 5340-01-076-5763
FSC: 5340 — Hardware, Commercial
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
length0.550 INCHES NOMINAL0.550 INCHES NOMINAL IN
materialALUMINUM ALLOY STANDOFFALUMINUM ALLOY STANDOFF
thread_class2A RIGHT EXTERNAL2A RIGHT EXTERNAL A
thread_length0.140 INCHES NOMINAL RIGHT EXTERNAL0.140 INCHES NOMINAL RIGHT EXTERNAL IN
flange_thickness0.357 INCHES MINIMUM AND 0.357 INCHES MINIMUM AND 0.363 INCHES MAXIMUM0.363 INCHES MAXIMUM IN
style_designatorFLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
thread_directionRIGHT-HAND RIGHT EXTERNALRIGHT-HAND RIGHT EXTERNAL
surface_treatmentOXIDE FILM STANDOFFOXIDE FILM STANDOFF
nominal_thread_size0.112 INCHES RIGHT EXTERNAL0.112 INCHES RIGHT EXTERNAL IN
thread_quantity_per_inch40 LEFT INTERNAL (INCLUDES THRU THREAD)40 LEFT INTERNAL (INCLUDES THRU THREAD)
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
flange_width_across_flats0.178 INCHES MINIMUM AND 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM0.198 INCHES MAXIMUM IN
NSN5340-01-076-5763
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 642AS4190 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
•
FLANGE WIDTH ACROSS FLATS: 0.178 INCHES MINIMUM AND 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM0.198 INCHES MAXIMUM IN
•
LENGTH: 0.550 INCHES NOMINAL0.550 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.357 INCHES MINIMUM AND 0.357 INCHES MINIMUM AND 0.363 INCHES MAXIMUM0.363 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.140 INCHES NOMINAL RIGHT EXTERNAL0.140 INCHES NOMINAL RIGHT EXTERNAL IN
•
STYLE DESIGNATOR: FLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
•
THREAD DIRECTION: RIGHT-HAND RIGHT EXTERNALRIGHT-HAND RIGHT EXTERNAL
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS0.178 INCHES MINIMUM AND 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM0.198 INCHES MAXIMUM IN
LENGTH0.550 INCHES NOMINAL0.550 INCHES NOMINAL IN
FLANGE THICKNESS0.357 INCHES MINIMUM AND 0.357 INCHES MINIMUM AND 0.363 INCHES MAXIMUM0.363 INCHES MAXIMUM IN
THREAD LENGTH0.140 INCHES NOMINAL RIGHT EXTERNAL0.140 INCHES NOMINAL RIGHT EXTERNAL IN
THREAD LENGTH0.310 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD)0.310 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN
STYLE DESIGNATORFLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
THREAD DIRECTIONRIGHT-HAND RIGHT EXTERNALRIGHT-HAND RIGHT EXTERNAL
THREAD DIRECTIONRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
NOMINAL THREAD SIZE0.112 INCHES LEFT INTERNAL (INCLUDES THRU THREAD)0.112 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN
NOMINAL THREAD SIZE0.112 INCHES RIGHT EXTERNAL0.112 INCHES RIGHT EXTERNAL 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 642AS4190?
642AS4190 is a STANDOFF,THREADED,SPACING.
What is the NSN for 642AS4190?
642AS4190 is cataloged in the U.S. Government catalog under NSN 5340-01-076-5763. 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.