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QB91242-5 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

QB91242-5: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE BODY, thread_class: 2B, thread_length: 0.125 INCHES NOMINAL IN, thread_series: UNS, overall_height: 0.219 INCHES NOMINAL IN, sealing_method: COMPRESSION. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-954-3092, 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
QB91242-5
NSN: 5340-00-954-3092
FSC: 5340 — Hardware, Commercial
CAGE: 55974 — HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS FORMER TEST SYSTEMS DIV (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
thread_class2B
thread_length0.125 INCHES NOMINAL IN
thread_seriesUNS
overall_height0.219 INCHES NOMINAL IN
sealing_methodCOMPRESSION
mounting_methodSTRAP(S)
style_designatorTHRU-HOLE
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.469 INCHES IN
base_inside_diameter0.469 INCHES NOMINAL IN
base_thread_locationINTERNAL
NSN5340-00-954-3092
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: QB91242-5 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: 0.625 INCHES NOMINAL IN
•
SEALING METHOD: COMPRESSION
•
THREAD SERIES: UNS
•
OPENING INSIDE DIAMETER: 0.250 INCHES NOMINAL IN
•
MOUNTING METHOD: STRAP(S)
•
BASE THREAD LOCATION: INTERNAL
•
THREAD LENGTH: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.219 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
SEALING METHODCOMPRESSION
THREAD SERIESUNS
OPENING INSIDE DIAMETER0.250 INCHES NOMINAL IN
MOUNTING METHODSTRAP(S)
BASE THREAD LOCATIONINTERNAL
THREAD LENGTH0.125 INCHES NOMINAL IN
STYLE DESIGNATORTHRU-HOLE
MOUNTING DEVICE QUANTITY1
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 QB91242-5?
QB91242-5 is a BOOT,DUST AND MOISTURE SEAL.
What is the NSN for QB91242-5?
QB91242-5 is cataloged in the U.S. Government catalog under NSN 5340-00-954-3092. 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.