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PartsTable / COMPONENT / 170977M
170977M ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RING,WEARING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, body_style: EXTERNAL LOCKING FLANGE, corner_shape: SQUARE ALL CORNERS, overall_length: 0.750 INCHES NOMINAL IN, distance_from_end: 0.188 INCHES NOMINAL IN, body_inside_diameter: 4.344 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 4320-00-218-3413, 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
170977M
NSN: 4320-00-218-3413
FSC: 4320
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_styleEXTERNAL LOCKING FLANGE
corner_shapeSQUARE ALL CORNERS
overall_length0.750 INCHES NOMINAL IN
distance_from_end0.188 INCHES NOMINAL IN
body_inside_diameter4.344 INCHES NOMINAL IN
body_outside_diameter4.998 INCHES NOMINAL IN
end_to_flange_distance0.562 INCHES NOMINAL IN
distance_between_flanges0.374 INCHES NOMINAL IN
distance_below_centerline0.062 INCHES NOMINAL IN
left_side_flange_thickness0.188 INCHES NOMINAL IN
right_side_flange_thickness0.188 INCHES NOMINAL IN
NSN4320-00-218-3413
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,WEARING TITLE COMPONENT PN 170977M MFR RING,WEARING
KEY FEATURES
•
BODY OUTSIDE DIAMETER: 4.998 INCHES NOMINAL IN
•
LARGEST EXTERNAL ANCHOR FLANGE RADIUS: 2.750 INCHES NOMINAL IN
•
DISTANCE BETWEEN FLANGES: 0.374 INCHES NOMINAL IN
•
CORNER SHAPE: SQUARE ALL CORNERS
•
MATERIAL: COPPER ALLOY
•
DISTANCE FROM END: 0.188 INCHES NOMINAL IN
•
BODY STYLE: EXTERNAL LOCKING FLANGE
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER4.998 INCHES NOMINAL IN
LARGEST EXTERNAL ANCHOR FLANGE RADIUS2.750 INCHES NOMINAL IN
DISTANCE BETWEEN FLANGES0.374 INCHES NOMINAL IN
CORNER SHAPESQUARE ALL CORNERS
MATERIALCOPPER ALLOY
OVERALL LENGTH0.750 INCHES NOMINAL IN
DISTANCE FROM END0.188 INCHES NOMINAL IN
BODY STYLEEXTERNAL LOCKING FLANGE
LEFT SIDE FLANGE THICKNESS0.188 INCHES NOMINAL IN
BODY INSIDE DIAMETER4.344 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
ASTM B221Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
10265Interchangeable
interchangeable cross-reference
interchangeable
7813722Interchangeable
interchangeable cross-reference
interchangeable
102465Interchangeable
interchangeable cross-reference
interchangeable
680Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 170977M?
170977M is a RING,WEARING.
What parts can replace 170977M?
There are 14 known substitutes for 170977M: ASTM B221, QQ-A-200/3, 10265 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 170977M?
170977M is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-218-3413. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026