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42518A — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

42518A: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 347 OR STEEL COMP 304 OVERALL, hole_diameter: 0.630 INCHES MINIMUM AND 0.630 INCHES MINIMUM AND 0.635 INCHES MAXIMUM0.635 INCHES MAXIMUM IN, overall_height: 0.044 INCHES NOMINAL0.044 INCHES NOMINAL IN, outside_diameter: 1.040 INCHES MINIMUM AND 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM1.060 INCHES MAXIMUM IN, style_designator: SPRING TENSION, material_thickness: 0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM0.013 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-056-4229, 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
42518A
NSN: 5310-01-056-4229
FSC: 5310 — Nuts and Washers
CAGE: 73760 — ITT AEROSPACE CONTROLS LLC DBA ITT AEROSPACE CONTROLS UNIT S (USA)
SPECIFICATIONS
materialSTEEL COMP 347 OR STEEL COMP 304 OVERALL
hole_diameter0.630 INCHES MINIMUM AND 0.630 INCHES MINIMUM AND 0.635 INCHES MAXIMUM0.635 INCHES MAXIMUM IN
overall_height0.044 INCHES NOMINAL0.044 INCHES NOMINAL IN
outside_diameter1.040 INCHES MINIMUM AND 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM1.060 INCHES MAXIMUM IN
special_featuresTHREE HOLES EQUALLY SPACED,0.040 IN. MIN TO 0.050 IN.MAX DIATHREE HOLES EQUALLY SPACED,0.040 IN. MIN TO 0.050 IN.MAX DIA IN
style_designatorSPRING TENSION
material_thickness0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM0.013 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5310-01-056-4229
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 42518A · 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
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.040 INCHES MINIMUM AND 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM1.060 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM0.013 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 347 OR STEEL COMP 304 OVERALL
•
HOLE DIAMETER: 0.630 INCHES MINIMUM AND 0.630 INCHES MINIMUM AND 0.635 INCHES MAXIMUM0.635 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.044 INCHES NOMINAL0.044 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.040 INCHES MINIMUM AND 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM1.060 INCHES MAXIMUM IN
MATERIAL THICKNESS0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM0.013 INCHES MAXIMUM IN
SPECIAL FEATURESTHREE HOLES EQUALLY SPACED,0.040 IN. MIN TO 0.050 IN.MAX DIATHREE HOLES EQUALLY SPACED,0.040 IN. MIN TO 0.050 IN.MAX DIA IN
MATERIALSTEEL COMP 347 OR STEEL COMP 304 OVERALL
HOLE DIAMETER0.630 INCHES MINIMUM AND 0.630 INCHES MINIMUM AND 0.635 INCHES MAXIMUM0.635 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 42518A?
42518A is a WASHER,SPRING TENSION.
What is the NSN for 42518A?
42518A is cataloged in the U.S. Government catalog under NSN 5310-01-056-4229. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.