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1854788-4 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1854788-4: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 1.125 INCHES NOMINAL1.125 INCHES NOMINAL IN, material: STEEL COMP 303 STANDOFFSTEEL COMP 303 STANDOFF, thread_class: 2A RIGHT EXTERNAL2A RIGHT EXTERNAL A, thread_length: 0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, flange_thickness: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN, style_designator: FLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-078-2427, 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
1854788-4
NSN: 5340-01-078-2427
FSC: 5340 — Hardware, Commercial
CAGE: 21877 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
length1.125 INCHES NOMINAL1.125 INCHES NOMINAL IN
materialSTEEL COMP 303 STANDOFFSTEEL COMP 303 STANDOFF
thread_class2A RIGHT EXTERNAL2A RIGHT EXTERNAL A
thread_length0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
flange_thickness0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
style_designatorFLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
thread_directionRIGHT-HAND RIGHT EXTERNALRIGHT-HAND RIGHT EXTERNAL
surface_treatmentPASSIVATE STANDOFFPASSIVATE STANDOFF
nominal_thread_size0.164 INCHES RIGHT EXTERNAL0.164 INCHES RIGHT EXTERNAL IN
thread_quantity_per_inch32 LEFT INTERNAL (INCLUDES THRU THREAD)32 LEFT INTERNAL (INCLUDES THRU THREAD)
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNALUNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNAL
flange_width_across_flats0.312 INCHES NOMINAL0.312 INCHES NOMINAL IN
NSN5340-01-078-2427
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1854788-4 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: 0.312 INCHES NOMINAL0.312 INCHES NOMINAL IN
•
LENGTH: 1.125 INCHES NOMINAL1.125 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
•
STYLE DESIGNATOR: FLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE STANDOFFQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE STANDOFF
•
THREAD DIRECTION: RIGHT-HAND RIGHT EXTERNALRIGHT-HAND RIGHT EXTERNAL
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS0.312 INCHES NOMINAL0.312 INCHES NOMINAL IN
LENGTH1.125 INCHES NOMINAL1.125 INCHES NOMINAL IN
FLANGE THICKNESS0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
THREAD LENGTH0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.250 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
THREAD LENGTH0.563 INCHES NOMINAL RIGHT EXTERNAL0.563 INCHES NOMINAL RIGHT EXTERNAL IN
STYLE DESIGNATORFLANGED WITH LEFT INTERNAL THREADFLANGED WITH LEFT INTERNAL THREAD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE STANDOFFQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE STANDOFF
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 SIZE0.164 INCHES LEFT INTERNAL (INCLUDES THRU THREAD)0.164 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) 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 1854788-4?
1854788-4 is a STANDOFF,THREADED,SPACING.
What is the NSN for 1854788-4?
1854788-4 is cataloged in the U.S. Government catalog under NSN 5340-01-078-2427. 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.