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Technical Data Sheet
FB139 ✓ 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 NUT,SQUARE HEAD is a the manufacturer industrial component. Key specifications include color: BLACK CASE, material: STEEL CASE, dial_size: 2 IN. DIA IN, bezel_type: SNAP-ON, scale_name: PRESSURE, scale_type: SINGLE.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6620-00-722-3875, 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
FB139
NSN: 6620-00-722-3875
FSC: 6620
CAGE: 28718 — THE HILLIARD CORP (USA)
SPECIFICATIONS
colorBLACK CASE
materialSTEEL CASE
dial_size2 IN. DIA IN
bezel_typeSNAP-ON
scale_namePRESSURE
scale_typeSINGLE
scale_range+0.000 TO 100.000 POUNDS PRESSURE PER SQUARE INCH LBS
pointer_typeINDICATING
adjustabilityNONADJUSTABLE
overall_depth1.500 INCHES NOMINAL IN
pointer_colorBLACK
actuation_typeSINGLE BOURDON TUBE
NSN6620-00-722-3875
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available NUT,SQUARE HEAD TITLE COMPONENT PN FB139 MFR NUT,SQUARE HEAD
KEY FEATURES
MATERIAL: STEEL CASE
SURFACE TREATMENT: PAINT EPOXY CASE
OVERALL DIAMETER: 2.125 INCHES NOMINAL IN
MOUNTING METHOD: RIGID STEM
SCALE NAME: PRESSURE
ADJUSTABILITY: NONADJUSTABLE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CASE
MATERIALBRONZE ACTUATING ELEMENT
SURFACE TREATMENTPAINT EPOXY CASE
OVERALL DEPTH1.500 INCHES NOMINAL IN
OVERALL DIAMETER2.125 INCHES NOMINAL IN
MOUNTING METHODRIGID STEM
SCALE NAMEPRESSURE
ADJUSTABILITYNONADJUSTABLE
CONNECTION LOCATIONBACK
SCALE SMALLEST INCREMENT1.000 POUNDS LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
TU4934Interchangeable
interchangeable cross-reference
interchangeable
FB139Interchangeable
interchangeable cross-reference
interchangeable
20275Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FB139?
FB139 is a NUT,SQUARE HEAD.
What parts can replace FB139?
There are 3 known substitutes for FB139: TU4934, FB139, 20275. Substitute compatibility should be verified for your specific system.
What is the NSN for FB139?
FB139 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6620-00-722-3875. This indicates validated use in U.S. government and defense supply chains.
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