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BL3684 ✓ 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,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1074 OVERALL, hole_diameter: 0.683 INCHES MINIMUM AND 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM0.693 INCHES MAXIMUM IN, overall_height: 0.105 INCHES MINIMUM AND 0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM0.145 INCHES MAXIMUM IN, outside_diameter: 1.235 INCHES MINIMUM AND 1.235 INCHES MINIMUM AND 1.245 INCHES MAXIMUM1.245 INCHES MAXIMUM IN, style_designator: SPRING TENSION, material_thickness: 0.024 INCHES NOMINAL0.024 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-997-1914, 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
BL3684
NSN: 5310-00-997-1914
FSC: 5310
CAGE: 08484 — BREEZE-EASTERN LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1074 OVERALL
hole_diameter0.683 INCHES MINIMUM AND 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM0.693 INCHES MAXIMUM IN
overall_height0.105 INCHES MINIMUM AND 0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM0.145 INCHES MAXIMUM IN
outside_diameter1.235 INCHES MINIMUM AND 1.235 INCHES MINIMUM AND 1.245 INCHES MAXIMUM1.245 INCHES MAXIMUM IN
style_designatorSPRING TENSION
material_thickness0.024 INCHES NOMINAL0.024 INCHES NOMINAL IN
material_document_and_classificationASTM A682 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-997-1914
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BL3684 · 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
•
OUTSIDE DIAMETER: 1.235 INCHES MINIMUM AND 1.235 INCHES MINIMUM AND 1.245 INCHES MAXIMUM1.245 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.683 INCHES MINIMUM AND 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM0.693 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1074 OVERALL
•
MATERIAL THICKNESS: 0.024 INCHES NOMINAL0.024 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A682 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER1.235 INCHES MINIMUM AND 1.235 INCHES MINIMUM AND 1.245 INCHES MAXIMUM1.245 INCHES MAXIMUM IN
HOLE DIAMETER0.683 INCHES MINIMUM AND 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM0.693 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1074 OVERALL
MATERIAL THICKNESS0.024 INCHES NOMINAL0.024 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
OVERALL HEIGHT0.105 INCHES MINIMUM AND 0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM0.145 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A682 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
S12BInterchangeable
interchangeable cross-reference
interchangeable
7012BInterchangeable
interchangeable cross-reference
interchangeable
63X7197T2Interchangeable
interchangeable cross-reference
interchangeable
14-16701Interchangeable
interchangeable cross-reference
interchangeable
1077099Interchangeable
interchangeable cross-reference
interchangeable
7052-100-BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BL3684?
BL3684 is a WASHER,SPRING TENSION.
What parts can replace BL3684?
There are 7 known substitutes for BL3684: S12B, 7012B, 63X7197T2 and 4 more. Substitute compatibility should be verified for your specific system.
Is BL3684 still available?
BL3684 is currently cancelled.
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Last verified: July 2026