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Technical Data Sheet
PM21746 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE BODY, body_height: 0.280 INCHES NOMINAL IN, overall_height: 0.718 INCHES NOMINAL IN, style_designator: THRU-HOLE, fsc_application_data: PENDANT,CONTROL GRIP ASSY,HELICOPTER, body_outside_diameter: 1.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-948-7151, 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
PM21746
NSN: 5340-00-948-7151
FSC: 5340
CAGE: 81579 — MASON ELECTRIC CO. DBA MASON CONTROLS (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
body_height0.280 INCHES NOMINAL IN
overall_height0.718 INCHES NOMINAL IN
style_designatorTHRU-HOLE
fsc_application_dataPENDANT,CONTROL GRIP ASSY,HELICOPTER
body_outside_diameter1.500 INCHES NOMINAL IN
opening_inside_diameter0.187 INCHES NOMINAL IN
NSN5340-00-948-7151
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: PM21746 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
MATERIAL: RUBBER SILICONE BODY
OPENING INSIDE DIAMETER: 0.187 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER: 1.500 INCHES NOMINAL IN
STYLE DESIGNATOR: THRU-HOLE
FSC APPLICATION DATA: PENDANT,CONTROL GRIP ASSY,HELICOPTER
BODY HEIGHT: 0.280 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.718 INCHES NOMINAL IN
MATERIALRUBBER SILICONE BODY
OPENING INSIDE DIAMETER0.187 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.500 INCHES NOMINAL IN
STYLE DESIGNATORTHRU-HOLE
FSC APPLICATION DATAPENDANT,CONTROL GRIP ASSY,HELICOPTER
BODY HEIGHT0.280 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
21746Upgraded Successor
successor cross-reference
successor
0187-3-4X3-8Interchangeable
interchangeable cross-reference
interchangeable
X12228Interchangeable
interchangeable cross-reference
interchangeable
113462-16Interchangeable
interchangeable cross-reference
interchangeable
8M3159Interchangeable
interchangeable cross-reference
interchangeable
1-2-0DX062Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PM21746?
PM21746 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace PM21746?
There are 6 known substitutes for PM21746: 21746, 0187-3-4X3-8, X12228 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PM21746?
PM21746 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-948-7151. This indicates validated use in U.S. government and defense supply chains.
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