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PartsTable / COMPONENT / P55520
P55520 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include end_item_identification: 5855-01-547-9489;SIGHT,NIGHT VISION SNIPERSCOPE, part_name_assigned_by_controlling_agency: HINGE PIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-548-3803, 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
P55520
NSN: 5315-01-548-3803
FSC: 5315
CAGE: 09YN9 — OPTICAL SYSTEMS TECHNOLOGY, INC DBA OSTI STARTRON (USA)
SPECIFICATIONS
end_item_identification5855-01-547-9489;SIGHT,NIGHT VISION SNIPERSCOPE
part_name_assigned_by_controlling_agencyHINGE PIN
NSN5315-01-548-3803
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: P55520 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATION5855-01-547-9489;SIGHT,NIGHT VISION SNIPERSCOPE
PART NAME ASSIGNED BY CONTROLLING AGENCYHINGE PIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
00725665450426Interchangeable
interchangeable cross-reference
interchangeable
51-10312Interchangeable
interchangeable cross-reference
interchangeable
204C22Interchangeable
interchangeable cross-reference
interchangeable
55520Interchangeable
interchangeable cross-reference
interchangeable
2247268P1Interchangeable
interchangeable cross-reference
interchangeable
LW1997Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P55520?
P55520 is a PIN,STRAIGHT,HEADLESS.
What parts can replace P55520?
There are 8 known substitutes for P55520: 00725665450426, 51-10312, 204C22 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P55520?
P55520 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-548-3803. 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