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Technical Data Sheet
BLK4144 ✓ 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

CROWFOOT ATTACHMENT,SOCKET WRENC. Key specifications include material: STEEL OVERALL, overall_length: 12.500 INCHES MINIMUM IN, style_designator: FLARE NUT SINGLE END, surface_treatment: PHOSPHATE OVERALL, supplementary_features: HEAD THICKNESS 0.906 IN. (PLUS/MINUS 0.016 IN.) IN, wrenching_surface_size: 1.375 INCHES NOMINAL SINGLE END 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 5120-00-277-2697, 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
BLK4144
NSN: 5120-00-277-2697
FSC: 5120
CAGE: 05506 — MARTIN SPROCKET AND GEAR INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length12.500 INCHES MINIMUM IN
style_designatorFLARE NUT SINGLE END
surface_treatmentPHOSPHATE OVERALL
supplementary_featuresHEAD THICKNESS 0.906 IN. (PLUS/MINUS 0.016 IN.) IN
wrenching_surface_size1.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_shape12 POINT SINGLE END INTERNAL
nondefinitive_spec/std_data2 TYPE AND 2 CLASS AND D STYLE
specification/standard_data0U583-SAE AS4167 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-00-277-2697
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CROWFOOT ATTACHMENT,SOCKET WRENC TITLE COMPONENT PN BLK4144 MFR CROWFOOT ATTACHMENT,SO
KEY FEATURES
SUPPLEMENTARY FEATURES: HEAD THICKNESS 0.906 IN. (PLUS/MINUS 0.016 IN.) IN
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS AND D STYLE
STYLE DESIGNATOR: FLARE NUT SINGLE END
WRENCHING SURFACE SHAPE: 12 POINT SINGLE END INTERNAL
SURFACE TREATMENT: PHOSPHATE OVERALL
WRENCHING SURFACE SIZE: 1.375 INCHES NOMINAL SINGLE END IN
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SUPPLEMENTARY FEATURESHEAD THICKNESS 0.906 IN. (PLUS/MINUS 0.016 IN.) IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 CLASS AND D STYLE
STYLE DESIGNATORFLARE NUT SINGLE END
OVERALL LENGTH12.500 INCHES MINIMUM IN
WRENCHING SURFACE SHAPE12 POINT SINGLE END INTERNAL
SURFACE TREATMENTPHOSPHATE OVERALL
WRENCHING SURFACE SIZE1.375 INCHES NOMINAL SINGLE END IN
MATERIALSTEEL OVERALL
SPECIFICATION/STANDARD DATA0U583-SAE AS4167 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4144Interchangeable
interchangeable cross-reference
interchangeable
4165Interchangeable
interchangeable cross-reference
interchangeable
A3405Interchangeable
interchangeable cross-reference
interchangeable
AS4167 TY2CL2STDInterchangeable
interchangeable cross-reference
interchangeable
BLK4132Interchangeable
interchangeable cross-reference
interchangeable
AS4167Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BLK4144?
BLK4144 is a CROWFOOT ATTACHMENT,SOCKET WRENC.
What parts can replace BLK4144?
There are 20 known substitutes for BLK4144: 4144, 4165, A3405 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BLK4144?
BLK4144 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-277-2697. This indicates validated use in U.S. government and defense supply chains.
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