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Technical Data Sheet
PartsTable / COMPONENT / 400976
400976 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The INSULATION,DUCT,AIRCRAFT is a the manufacturer industrial component. Key specifications include end_item_identification: ACFT MODEL F4, general_characteristics_item_description: FIBERGLASS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-493-8125, 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
400976
NSN: 5325-00-493-8125
FSC: 5325
CAGE: 3B4M0 — LUCENT TECHNOLOGIES INC CORPORATE HEADQUARTERS (USA)
SPECIFICATIONS
end_item_identificationACFT MODEL F4
general_characteristics_item_descriptionFIBERGLASS
NSN5325-00-493-8125
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 400976 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
USAGE DESIGN: EXTERNAL
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,COMPOSITION 1060 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
•
SURFACE TREATMENT: CADMIUM AND CHROMATE
•
MATERIAL HARDNESS RATING: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
INSIDE DIAMETER: 0.569 INCHES MINIMUM AND 0.584 INCHES MAXIMUM IN
•
RING STYLE: EXTERNAL INVERTED LUGS
TECHNICAL CHARACTERISTICS (FLIS)
USAGE DESIGNEXTERNAL
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,COMPOSITION 1060 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
SURFACE TREATMENTCADMIUM AND CHROMATE
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
INSIDE DIAMETER0.569 INCHES MINIMUM AND 0.584 INCHES MAXIMUM IN
RING STYLEEXTERNAL INVERTED LUGS
MAJOR THICKNESS0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
87039X1ANG25Interchangeable
interchangeable cross-reference
interchangeable
M8000M110Interchangeable
interchangeable cross-reference
interchangeable
C87039X1EInterchangeable
interchangeable cross-reference
interchangeable
B30Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-80095TYPE1SIZE36Interchangeable
interchangeable cross-reference
interchangeable
TIP00877-050CT70Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 400976?
400976 is a INSULATION,DUCT,AIRCRAFT.
What parts can replace 400976?
There are 29 known substitutes for 400976: 87039X1ANG25, M8000M110, C87039X1E and 26 more. Substitute compatibility should be verified for your specific system.
Is 400976 still available?
400976 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026