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Technical Data Sheet
PartsTable / COMPONENT / S1.8-2
S1.8-2 ✓ 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 S1.8-2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-157-8658, 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
S1.8-2
NSN: 5310-01-157-8658
FSC: 5310
CAGE: 19904 — STROCO MANUFACTURING, INC. DBA STROCO MANUFACTURING INC (USA)
SPECIFICATIONS
Part NumberS1.8-2
NSN5310-01-157-8658
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S1.8-2 · 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
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: ALUMINUM ALLOY,QQ-A-250-11,COND T6,0.360 IN. MIN,0.380 IN. MAX W,0.032 IN. THK PLATE,TWO NUTS 0.138-32 UNJC-3B IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONALUMINUM ALLOY,QQ-A-250-11,COND T6,0.360 IN. MIN,0.380 IN. MAX W,0.032 IN. THK PLATE,TWO NUTS 0.138-32 UNJC-3B IN
END ITEM IDENTIFICATIONJET ENGINE MODEL F104
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
105831Interchangeable
interchangeable cross-reference
interchangeable
L478Interchangeable
interchangeable cross-reference
interchangeable
43-291Interchangeable
interchangeable cross-reference
interchangeable
1A43-291Interchangeable
interchangeable cross-reference
interchangeable
7974253Interchangeable
interchangeable cross-reference
interchangeable
S182Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S1.8-2?
S1.8-2 is a S1.8-2.
What parts can replace S1.8-2?
There are 10 known substitutes for S1.8-2: 105831, L478, 43-291 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S1.8-2?
S1.8-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-157-8658. 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