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Technical Data Sheet
PartsTable / COMPONENT / 8551-1
8551-1 ✓ Verified by PartsTable
Origin Storage · 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

This OM3 Duplex Multimode Fibre Optic Cable is ideal for connecting 10GBase-SR, 10GBase-LRM, SFP+ and QSFP+ transceivers for 10 gigabit network connections. This cable has a LSZH jacket which protects from toxic and corrosive gases in poorly ventilated spaces and other areas where it is most critical. This cable also provides backward compatibility with existing 50/125 equipment and the performance headroom required to support LED and VCSEL laser light sources, and 10 Gigabit Ethernet applications.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-375-7859, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
8551-1
NSN: 4820-00-375-7859
FSC: 4820
CAGE: 38056 — ASHCROFT INC DBA HEISE (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
body_width0.342 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN
head_styleFLAT CHAMFER
body_height0.060 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
body_length0.342 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN
head_height0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
thread_length0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
screw_materialCOPPER ALLOY
fastener_length0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
special_featuresGENERIC P/N 54F245
NSN4820-00-375-7859
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8551-1 · Origin Storage ⚠ 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: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALNICKEL ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
53-776Interchangeable
interchangeable cross-reference
interchangeable
14348Interchangeable
interchangeable cross-reference
interchangeable
504-8045-002Interchangeable
interchangeable cross-reference
interchangeable
8551-1Interchangeable
interchangeable cross-reference
interchangeable
29603Interchangeable
interchangeable cross-reference
interchangeable
85511012AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8551-1?
8551-1 is a MICROCIRCUIT,DIGITAL manufactured by Origin Storage.
What parts can replace 8551-1?
There are 13 known substitutes for 8551-1: 53-776, 14348, 504-8045-002 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8551-1?
8551-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-375-7859. 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