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Technical Data Sheet
H121-4 ✓ 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 FORMALIN,10 PERCENT BUFFERED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, dial_size: 3-1/2 IN. DIA IN, bezel_type: THREAD, scale_name: PRESSURE AND VACUUM, scale_type: MULTIPLE, design_type: CLAW ENGAGING.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-481-6673, 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
H121-4
NSN: 6685-00-481-6673
FSC: 6685
CAGE: 38508 — DESCO CORP MARSH BELLOFRAM DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
dial_size3-1/2 IN. DIA IN
bezel_typeTHREAD
scale_namePRESSURE AND VACUUM
scale_typeMULTIPLE
design_typeCLAW ENGAGING
scale_range+0.0 TO 30.0 INCHES AND +0.0 TO 60.0 POUNDS PRESSURE PER SQUARE INCH LBS
pointer_typeINDICATING
adjustabilityADJUSTABLE
hole_diameter0.189 INCHES NOMINAL IN
hole_quantity2
overall_depth1.781 INCHES NOMINAL IN
NSN6685-00-481-6673
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FORMALIN,10 PERCENT BUFFERED TITLE COMPONENT PN H121-4 MFR FORMALIN,10 PERCENT BU
KEY FEATURES
BOLT CIRCLE DIAMETER: 4.312 INCHES NOMINAL IN
OVERALL DIAMETER: 3.719 INCHES NOMINAL IN
ADJUSTABILITY: ADJUSTABLE
MOUNTING METHOD: FLUSH
SCALE NAME: PRESSURE AND VACUUM
CONNECTION QUANTITY: 1
CONNECTION LOCATION: BOTTOM
MATERIAL: BRASS CASE
TECHNICAL CHARACTERISTICS (FLIS)
BOLT CIRCLE DIAMETER4.312 INCHES NOMINAL IN
OVERALL DIAMETER3.719 INCHES NOMINAL IN
ADJUSTABILITYADJUSTABLE
MOUNTING METHODFLUSH
SCALE NAMEPRESSURE AND VACUUM
CONNECTION QUANTITY1
CONNECTION LOCATIONBOTTOM
MATERIALBRASS CASE
DIAL SIZE3-1/2 IN. DIA IN
CONNECTION SIZE0.250 IN. NPT DIA IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
T9161357PC10Interchangeable
interchangeable cross-reference
interchangeable
SF-276 5/16Interchangeable
interchangeable cross-reference
interchangeable
GPW3571Interchangeable
interchangeable cross-reference
interchangeable
H121-4Interchangeable
interchangeable cross-reference
interchangeable
6550NCM010192Interchangeable
Formalin,10 Percent Buffered
interchangeable
01-0184Interchangeable
Formalin,10 Percent Buffered
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H121-4?
H121-4 is a FORMALIN,10 PERCENT BUFFERED.
What parts can replace H121-4?
There are 8 known substitutes for H121-4: T9161357PC10, SF-276 5/16, GPW3571 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H121-4?
H121-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-481-6673. This indicates validated use in U.S. government and defense supply chains.
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