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174974A ✓ 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: PLAIN, corner_shape: SQUARE ALL CORNERS, overall_length: 0.438 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES LEFT FACE, special_features: MTG HOLES COUNTERBORED 0.438 IN. DIA AND 0.250 IN.

DEEP 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 4320-00-218-3338, 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
174974A
NSN: 4320-00-218-3338
FSC: 4320
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_stylePLAIN
corner_shapeSQUARE ALL CORNERS
overall_length0.438 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES LEFT FACE
special_featuresMTG HOLES COUNTERBORED 0.438 IN. DIA AND 0.250 IN. DEEP IN
bolt_hole_quantity6
body_inside_diameter3.657 INCHES NOMINAL IN
bolt_circle_diameter4.312 INCHES NOMINAL IN
body_outside_diameter4.933 INCHES MINIMUM AND 4.935 INCHES MAXIMUM IN
unthreaded_mounting_hole_diameter0.281 INCHES NOMINAL IN
NSN4320-00-218-3338
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,WEARING TITLE COMPONENT PN 174974A MFR RING,WEARING
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES LEFT FACE
•
MATERIAL: COPPER ALLOY
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY STYLE: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESMTG HOLES COUNTERBORED 0.438 IN. DIA AND 0.250 IN. DEEP IN
SURFACE FINISH125.0 MICROINCHES LEFT FACE
SURFACE FINISH125.0 MICROINCHES INSIDE
SURFACE FINISH125.0 MICROINCHES OUTSIDE
MATERIALCOPPER ALLOY
CORNER SHAPESQUARE ALL CORNERS
SURFACE FINISH125.0 MICROINCHES RIGHT FACE
BODY STYLEPLAIN
OVERALL LENGTH0.438 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER4.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
11682Interchangeable
interchangeable cross-reference
interchangeable
H-1026-TP-WInterchangeable
interchangeable cross-reference
interchangeable
4142PInterchangeable
interchangeable cross-reference
interchangeable
SL4143PC30Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 174974A?
174974A is a RING,WEARING.
What parts can replace 174974A?
There are 4 known substitutes for 174974A: 11682, H-1026-TP-W, 4142P and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 174974A?
174974A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-218-3338. 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