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W40 — HEATER,THERMAL RELEASE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

W40: HEATER,THERMAL RELEASE.

The HEATER,THERMAL RELEASE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, face_type: STRAIGHT, bore_style: W/ KEYWAY BOTH ENDS, helix_angle: 19.3165 DEGREES, hole_diameter: 7.982 INCHES MINIMUM AND 8.017 INCHES MAXIMUM IN, pitch_diameter: 1.3490 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0990, 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
W40
NSN: 5310-00-186-0990
NIINs: 001860990, 002517564, 012869303, 014532144
FSC: 5310 — Nuts and Washers
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
face_typeSTRAIGHT
bore_styleW/ KEYWAY BOTH ENDS
helix_angle19.3165 DEGREES
hole_diameter7.982 INCHES MINIMUM AND 8.017 INCHES MAXIMUM IN
pitch_diameter1.3490 INCHES NOMINAL IN
pressure_angle14.5000 DEGREES
contact_quantity4
outside_diameter9.156 INCHES MINIMUM AND 9.216 INCHES MAXIMUM IN
special_featuresCONTACTS NORMALLY OPEN
style_designatorHUBLESS
structural_designNONPILE-UP
NSN5310-00-186-0990
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: W40 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.750 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 10.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 9.156 INCHES MINIMUM AND 9.216 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.156 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 19
•
INTERNAL PREBENT KEY LENGTH: 0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.750 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS10.312 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER9.156 INCHES MINIMUM AND 9.216 INCHES MAXIMUM IN
MATERIAL THICKNESS0.156 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY19
INTERNAL PREBENT KEY LENGTH0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1031 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1009 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OVERALL
SUBSTITUTES & CROSS-REFERENCES 5
1213E3500FIND4Reference document
Same NSN cross-reference
Reference document — Secondary reference
MILW21338TYPE1CLASS1SIZE40Reference document
Same NSN cross-reference
Reference document — Identification reference
44J48PC41Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
44J48PC4Reference document
Same NSN cross-reference
Reference document — Secondary reference
44J49PC41Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is W40?
W40 is a HEATER,THERMAL RELEASE.
What parts can replace W40?
There are 5 known substitutes for W40: 1213E3500FIND4, MILW21338TYPE1CLASS1SIZE40, 44J48PC41 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for W40?
W40 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0990. 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.