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Technical Data Sheet
172T51 ✓ 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 STRAP,RETAINING is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, material: IRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED, mounting_pad: NOT INCLUDED, overall_width: 0.750 INCHES NOMINAL IN, overall_length: 2.125 INCHES NOMINAL IN, style_designator: HALF ARCH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-598-2570, 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
172T51
NSN: 5340-00-598-2570
FSC: 5340
CAGE: 03743 — EGS ELECTRICAL GROUP APPLETON DIV (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialIRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
mounting_padNOT INCLUDED
overall_width0.750 INCHES NOMINAL IN
overall_length2.125 INCHES NOMINAL IN
style_designatorHALF ARCH
surface_treatmentZINC
material_thickness0.281 INCHES NOMINAL IN
mounting_hole_size0.281 INCHES NOMINAL IN
inside_diameter/arch_length0.922 INCHES NOMINAL IN
material_document_and_classificationQQ-I-666 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
distance_between_base_and_inside_of_arch0.906 INCHES NOMINAL IN
NSN5340-00-598-2570
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 172T51 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
MOUNTING PAD: NOT INCLUDED
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-I-666 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
STYLE DESIGNATOR: HALF ARCH
SURFACE TREATMENT: ZINC
MATERIAL: IRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
CUSHION: NOT INCLUDED
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING PADNOT INCLUDED
OVERALL WIDTH0.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-I-666 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
STYLE DESIGNATORHALF ARCH
SURFACE TREATMENTZINC
MATERIALIRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
CUSHIONNOT INCLUDED
END ITEM IDENTIFICATIONW/S:HELICOPTER, CARRIER BASED ASW, SH-60F; IMPROVED CONTACT SUPPORT SET (ICSS); HELICOPTER, SEARCH AND RESCUE, HH-60H; HELICOPTER, USCG SEARCH AND RESCUE, HH-60J; HELICOPTER, ADVANCE ATTACK, AH-1W; ASSAULT AMPHIBIOUS VEHICLE, COMMAND (AAVC-7A1); HELICOPTER, MH-53E; MARINE AIR TRAFFIC CONTROL LANDING SYSTEMS; AIRCRAFT, C-2A (REPROCURED); AIRCRAFT, PROWLER EA-6B A
INSIDE DIAMETER/ARCH LENGTH0.922 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
FFS760Upgraded Successor
successor cross-reference
successor
MS35140-23Upgraded Successor
successor cross-reference
successor
NASM760Upgraded Successor
successor cross-reference
successor
PTMC250Upgraded Successor
successor cross-reference
successor
FF-S-760AUpgraded Successor
successor cross-reference
successor
1280Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 172T51?
172T51 is a STRAP,RETAINING.
What parts can replace 172T51?
There are 22 known substitutes for 172T51: FFS760, MS35140-23, NASM760 and 19 more. Substitute compatibility should be verified for your specific system.
Is 172T51 still available?
172T51 is currently cancelled.
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