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Technical Data Sheet
PartsTable / COMPONENT / 4- 1 IN. LG SOLID STEEL
4- 1 IN. LG SOLID STEEL ✓ 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 4- 1 IN. LG SOLID STEEL is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-198-5978, 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
4- 1 IN. LG SOLID STEEL
NSN: 5315-00-198-5978
FSC: 5315
CAGE: 87833 — WORCESTER TAPER PIN CORP (USA)
SPECIFICATIONS
Part Number4- 1 IN. LG SOLID STEEL
NSN5315-00-198-5978
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4- 1 IN. LG SOLID STEEL · 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
•
PIN OVERALL LENGTH: 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
•
FIRST END OUTER RADIUS: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
SURFACE FINISH: 63.0 MICROINCHES SHANK END
•
FIRST END LOCATION: BOTH ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
FIRST END STYLE: OVAL
•
PIN SIZE DESIGNATION: 4
TECHNICAL CHARACTERISTICS (FLIS)
PIN OVERALL LENGTH0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
FIRST END OUTER RADIUS0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
SURFACE FINISH63.0 MICROINCHES SHANK END
FIRST END LOCATIONBOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
FIRST END STYLEOVAL
PIN SIZE DESIGNATION4
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
543Interchangeable
interchangeable cross-reference
interchangeable
118597H1Interchangeable
interchangeable cross-reference
interchangeable
18597H1Interchangeable
interchangeable cross-reference
interchangeable
DD493AInterchangeable
interchangeable cross-reference
interchangeable
SMD500020-3Interchangeable
interchangeable cross-reference
interchangeable
80327Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4- 1 IN. LG SOLID STEEL?
4- 1 IN. LG SOLID STEEL is a 4- 1 IN. LG SOLID STEEL.
What parts can replace 4- 1 IN. LG SOLID STEEL?
There are 17 known substitutes for 4- 1 IN. LG SOLID STEEL: 543, 118597H1, 18597H1 and 14 more. Substitute compatibility should be verified for your specific system.
Is 4- 1 IN. LG SOLID STEEL still available?
4- 1 IN. LG SOLID STEEL is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026