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Technical Data Sheet
PartsTable / COMPONENT / W-661
W-661 ✓ 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

WRENCH,BOX AND OPEN END,COMBINAT. Key specifications include material: COPPER ALLOY OVERALL, head_angle: 15.0 DEGREES NOMINAL, overall_length: 9.500 INCHES NOMINAL IN, style_designator: OFFSET, features_provided: NONMAGNETIC AND NONSPARKING, wrenching_surface_size: 0.750 INCHES NOMINAL BOTH ENDS 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 5120-00-177-7322, 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
W-661
NSN: 5120-00-177-7322
FSC: 5120
CAGE: 03306 — AMPCO METAL INC. DBA AMPCO METAL INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
head_angle15.0 DEGREES NOMINAL
overall_length9.500 INCHES NOMINAL IN
style_designatorOFFSET
features_providedNONMAGNETIC AND NONSPARKING
wrenching_surface_size0.750 INCHES NOMINAL BOTH ENDS IN
wrenching_surface_shapeOVAL FIRST END INTERNAL
wrenching_end_offset_angle15.0 DEGREES NOMINAL
NSN5120-00-177-7322
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available WRENCH,BOX AND OPEN END,COMBINAT TITLE COMPONENT PN W-661 MFR WRENCH,BOX AND OPEN EN
KEY FEATURES
•
WRENCHING SURFACE SHAPE: OVAL FIRST END INTERNAL
•
WRENCHING END OFFSET ANGLE: 15.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: OFFSET
•
MATERIAL: COPPER ALLOY OVERALL
•
HEAD ANGLE: 15.0 DEGREES NOMINAL
•
FEATURES PROVIDED: NONMAGNETIC AND NONSPARKING
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH9.500 INCHES NOMINAL IN
WRENCHING SURFACE SHAPEOVAL FIRST END INTERNAL
WRENCHING END OFFSET ANGLE15.0 DEGREES NOMINAL
STYLE DESIGNATOROFFSET
WRENCHING SURFACE SHAPE12 POINT SECOND END INTERNAL
MATERIALCOPPER ALLOY OVERALL
HEAD ANGLE15.0 DEGREES NOMINAL
FEATURES PROVIDEDNONMAGNETIC AND NONSPARKING
WRENCHING SURFACE SIZE0.750 INCHES NOMINAL BOTH ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
2931Interchangeable
interchangeable cross-reference
interchangeable
185454Interchangeable
interchangeable cross-reference
interchangeable
FC2921Interchangeable
interchangeable cross-reference
interchangeable
W66Interchangeable
interchangeable cross-reference
interchangeable
W-66-2367Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W-661?
W-661 is a WRENCH,BOX AND OPEN END,COMBINAT.
What parts can replace W-661?
There are 5 known substitutes for W-661: 2931, 185454, FC2921 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for W-661?
W-661 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-177-7322. 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