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Technical Data Sheet
FC66A ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CROWFOOT ATTACHMENT,SOCKET WRENC. Key specifications include material: STEEL OVERALL, overall_length: 3.000 INCHES NOMINAL IN, drive_end_shape: SQUARE SINGLE END INTERNAL, special_features: WITH SIDE LOCK HOLE, style_designator: OPEN END CAMBER, surface_treatment: CHROMIUM OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-335-1148, 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
FC66A
NSN: 5120-01-335-1148
FSC: 5120
CAGE: ZAP69 — SNAP ON TOOLS (AUS)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length3.000 INCHES NOMINAL IN
drive_end_shapeSQUARE SINGLE END INTERNAL
special_featuresWITH SIDE LOCK HOLE
style_designatorOPEN END CAMBER
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_size2.062 INCHES NOMINAL SINGLE END IN
wrenching_surface_shapeOVAL SINGLE END INTERNAL
nondefinitive_spec/std_data2 TYPE AND 2 CLASS
specification/standard_data05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-01-335-1148
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CROWFOOT ATTACHMENT,SOCKET WRENC TITLE COMPONENT PN FC66A MFR CROWFOOT ATTACHMENT,SO
KEY FEATURES
WRENCHING SURFACE SHAPE: OVAL SINGLE END INTERNAL
WRENCHING SURFACE SIZE: 2.062 INCHES NOMINAL SINGLE END IN
DRIVE SURFACE SIZE: 0.375 INCHES NOMINAL SINGLE END IN
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS
MATERIAL: STEEL OVERALL
STYLE DESIGNATOR: OPEN END CAMBER
SPECIFICATION/STANDARD DATA: 05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
WRENCHING SURFACE SHAPEOVAL SINGLE END INTERNAL
WRENCHING SURFACE SIZE2.062 INCHES NOMINAL SINGLE END IN
DRIVE SURFACE SIZE0.375 INCHES NOMINAL SINGLE END IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 CLASS
MATERIALSTEEL OVERALL
SPECIAL FEATURESWITH SIDE LOCK HOLE
STYLE DESIGNATOROPEN END CAMBER
SPECIFICATION/STANDARD DATA05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SURFACE TREATMENTCHROMIUM OVERALL
DRIVE END SHAPESQUARE SINGLE END INTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
TC12Interchangeable
interchangeable cross-reference
interchangeable
FC012Interchangeable
interchangeable cross-reference
interchangeable
B107.21 TY2CL2Interchangeable
interchangeable cross-reference
interchangeable
3319Interchangeable
interchangeable cross-reference
interchangeable
B107.21Interchangeable
interchangeable cross-reference
interchangeable
STP 4926CFInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FC66A?
FC66A is a CROWFOOT ATTACHMENT,SOCKET WRENC.
What parts can replace FC66A?
There are 22 known substitutes for FC66A: TC12, FC012, B107.21 TY2CL2 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FC66A?
FC66A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-335-1148. This indicates validated use in U.S. government and defense supply chains.
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