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Technical Data Sheet
PartsTable / COMPONENT / 540977
540977 ✓ 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 VALVE ASSY,FILTER is a the manufacturer industrial component. Key specifications include end_item_identification: ENGINE ACFT,J75, criticality_code_justification: AGAV. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-7668, 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
540977
NSN: 5305-00-282-7668
FSC: 5305
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
end_item_identificationENGINE ACFT,J75
criticality_code_justificationAGAV
NSN5305-00-282-7668
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 540977 · 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
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD QUANTITY PER INCH: 44
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD LENGTH: 0.156 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.146 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
•
POINT STYLE: CONE
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD QUANTITY PER INCH44
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD LENGTH0.156 INCHES MAXIMUM IN
FASTENER LENGTH0.146 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
POINT STYLECONE
MATERIALSTEEL COMP 303 OVERALL
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
540977Interchangeable
interchangeable cross-reference
interchangeable
25718Interchangeable
interchangeable cross-reference
interchangeable
FF-S-210B TY II ST 2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 540977?
540977 is a VALVE ASSY,FILTER.
What parts can replace 540977?
There are 3 known substitutes for 540977: 540977, 25718, FF-S-210B TY II ST 2. Substitute compatibility should be verified for your specific system.
What is the NSN for 540977?
540977 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-7668. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026