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Technical Data Sheet
PartsTable / COMPONENT / 3974B
3974B ✓ 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 WASHER,SLOTTED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, hole_diameter: 0.102 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN, outside_diameter: 0.444 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, style_designator: SLOTTED, material_thickness: 0.038 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN, material_document_and_classification: MS104,FSCM 22501 MFR REF SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-583-4559, 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
3974B
NSN: 5310-00-583-4559
FSC: 5310
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
hole_diameter0.102 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN
outside_diameter0.444 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
style_designatorSLOTTED
material_thickness0.038 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
material_document_and_classificationMS104,FSCM 22501 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-583-4559
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3974B · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: MS104,FSCM 22501 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.038 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 316 OVERALL
•
OUTSIDE DIAMETER: 0.444 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.102 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SLOTTED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMS104,FSCM 22501 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.038 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
MATERIALSTEEL COMP 316 OVERALL
OUTSIDE DIAMETER0.444 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
HOLE DIAMETER0.102 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN
STYLE DESIGNATORSLOTTED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
S17862Interchangeable
interchangeable cross-reference
interchangeable
207231Interchangeable
interchangeable cross-reference
interchangeable
39741Interchangeable
interchangeable cross-reference
interchangeable
1360Interchangeable
interchangeable cross-reference
interchangeable
212670-02Interchangeable
interchangeable cross-reference
interchangeable
N95G058Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3974B?
3974B is a WASHER,SLOTTED.
What parts can replace 3974B?
There are 8 known substitutes for 3974B: S17862, 207231, 39741 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3974B?
3974B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-583-4559. 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