PartsTable
Technical Data Sheet
307561 ✓ 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 1010 OVERALL, hole_diameter: 0.324 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN, overall_height: 0.266 INCHES NOMINAL IN, hardness_rating: 88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM, outside_diameter: 1.250 INCHES NOMINAL IN, style_designator: SPRING TENSION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-115-2530, 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
307561
NSN: 5310-00-115-2530
FSC: 5310
CAGE: K3488 — LEWMAR LTD (GBR)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter0.324 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
overall_height0.266 INCHES NOMINAL IN
hardness_rating88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
outside_diameter1.250 INCHES NOMINAL IN
style_designatorSPRING TENSION
features_providedCASEHARDENED
material_thickness0.0797 INCHES MINIMUM AND 0.0997 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-115-2530
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 307561 · 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: 1.250 INCHES NOMINAL IN
STYLE DESIGNATOR: SPRING TENSION
MATERIAL THICKNESS: 0.0797 INCHES MINIMUM AND 0.0997 INCHES MAXIMUM IN
FEATURES PROVIDED: CASEHARDENED
HOLE DIAMETER: 0.324 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
MATERIAL: STEEL COMP 1010 OVERALL
HARDNESS RATING: 88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
MATERIAL THICKNESS0.0797 INCHES MINIMUM AND 0.0997 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
HOLE DIAMETER0.324 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
OVERALL HEIGHT0.266 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
HARDNESS RATING88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
4148Interchangeable
interchangeable cross-reference
interchangeable
33-04148-1AInterchangeable
interchangeable cross-reference
interchangeable
33-04148-0AInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-6615Interchangeable
interchangeable cross-reference
interchangeable
MILH6615Interchangeable
interchangeable cross-reference
interchangeable
10086323Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 307561?
307561 is a WASHER,SPRING TENSION.
What parts can replace 307561?
There are 16 known substitutes for 307561: 4148, 33-04148-1A, 33-04148-0A and 13 more. Substitute compatibility should be verified for your specific system.
Is 307561 still available?
307561 is currently cancelled.
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