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Technical Data Sheet
21770 ✓ Verified by PartsTable
Esselte · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

Slide binding is the solution when presentation is required at a budget price.<br><br>- Instant presentation.<br>- Low cost solution – ideal for students and schools.<br>- Binds looseleaf pages into book form.<br>- Easy paper insertion.<br>- No need to punch paper.<br>- Covers available.<br>- Multipunched slide available for filing in binders. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-054-5179, 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
21770
NSN: 5330-00-054-5179
FSC: 5330
CAGE: 68037 — ARGO-TECH CORP NAVY POWER DIV (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.078 INCHES NOMINAL IN
thread_class2B
thread_seriesUNEF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.312 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch32
NSN5330-00-054-5179
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21770 MFR: Esselte ⚠ 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
AMS-QQ-A-200/8Interchangeable
interchangeable cross-reference
interchangeable
PA7100Interchangeable
interchangeable cross-reference
interchangeable
SAE-AMS-QQ-A-200/8Interchangeable
interchangeable cross-reference
interchangeable
26051-3Interchangeable
interchangeable cross-reference
interchangeable
21770Interchangeable
interchangeable cross-reference
interchangeable
10009736Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21770?
21770 is a FILTER ELEMENT,FLUID manufactured by Esselte.
What parts can replace 21770?
There are 12 known substitutes for 21770: AMS-QQ-A-200/8, PA7100, SAE-AMS-QQ-A-200/8 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21770?
21770 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-054-5179. This indicates validated use in U.S. government and defense supply chains.
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