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Technical Data Sheet
PartsTable / COMPONENT / 187-321
187-321 ✓ Verified by PartsTable
Equip · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The equip® Installation Cable is made of preeminent materials and thoroughly examined to meet or surpass industrial standards. The solid installation cable is aimed to offer sturdy wide-ranged cable deployments, including 1000BASE-T Gigabit Ethernet and 100BASE-TX Fast Ethernet.   This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-007-2193, 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
187-321
NSN: 4820-00-007-2193
FSC: 4820
CAGE: 99657 — MAROTTA CONTROLS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OR COPPER ALLOY OVERALL
seat_angle42.0 DEGREES FIRST END
thread_class2B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
connection_styleINVERTED FLARE (TUBE) FIRST END
nominal_thread_size0.250 INCHES SECOND END IN
nominal_overall_length0.891 INCHES IN
end_item_identification2-1/2 TON,6X6,M SERIES TRUCKS
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_quantity_per_inch24 FIRST END
thread_series_designatorUNS FIRST END
nondefinitive_spec/std_data5A FIGURE A
NSN4820-00-007-2193
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 187-321 · Equip ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL BODY
•
FLANGE DIAMETER: 0.749 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
SEATING SURFACE SHAPE: FLAT
•
BODY INSIDE DIAMETER: 0.160 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.633 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BODY
FLANGE DIAMETER0.749 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
SEATING SURFACE SHAPEFLAT
BODY INSIDE DIAMETER0.160 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.633 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
MATERIALPLASTIC POLYAMIDE NYLON FACE
FLANGE SEAT TO DISK END HEIGHT0.093 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
8925029Interchangeable
interchangeable cross-reference
interchangeable
70803Interchangeable
interchangeable cross-reference
interchangeable
234X4Interchangeable
interchangeable cross-reference
interchangeable
187-322Interchangeable
interchangeable cross-reference
interchangeable
187-321Interchangeable
interchangeable cross-reference
interchangeable
183211Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 187-321?
187-321 is a ADAPTER,STRAIGHT,PIPE TO TUBE manufactured by Equip.
What parts can replace 187-321?
There are 6 known substitutes for 187-321: 8925029, 70803, 234X4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 187-321?
187-321 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-007-2193. 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