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Technical Data Sheet
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11977 — Technical Data Sheet

✓ 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

SEAL,AIR,AIRCRAFT GAS TURBINE EN. Key specifications include material: STEEL, body_width: 1.312 INCHES NOMINAL IN, head_style: HEXAGON, body_height: 2.375 INCHES NOMINAL IN, body_length: 1.312 INCHES NOMINAL IN, cereal_type: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5306-00-298-8640, 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
11977
NSN: 5306-00-298-8640
FSC: 5306
CAGE: 13841 — TIFFIN PARTS, L.L.C. DIV SUBSIDIARY OF PETTIBONE CORP. (USA)
SPECIFICATIONS
materialSTEEL
body_width1.312 INCHES NOMINAL IN
head_styleHEXAGON
body_height2.375 INCHES NOMINAL IN
body_length1.312 INCHES NOMINAL IN
cereal_typePLAIN
head_height1.312 INCHES NOMINAL IN
constructionONE-PIECE
product_sizeBULK PARTY SIZE
thread_class2A A
thread_length1.875 INCHES MINIMUM IN
cereal_mixtureBRAN AND OATS
NSN5306-00-298-8640
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11977 · 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
•
NOMINAL THREAD DIAMETER: 1.500 INCHES IN
•
WIDTH BETWEEN FLATS: 2.250 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD HEIGHT: 1.312 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
•
FASTENER LENGTH: 10.000 INCHES NOMINAL IN
•
THREAD LENGTH: 1.875 INCHES MINIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
NOMINAL THREAD DIAMETER1.500 INCHES IN
WIDTH BETWEEN FLATS2.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
HEAD HEIGHT1.312 INCHES NOMINAL IN
HEAD STYLEHEXAGON
FASTENER LENGTH10.000 INCHES NOMINAL IN
THREAD LENGTH1.875 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS2A A
MATERIALSTEEL COMP 3135 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1650PL0658208InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
CHEERIOSInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10158765InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4056T05P09InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
6515NCM093423InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3298C13InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11977?
11977 is a SEAL,AIR,AIRCRAFT GAS TURBINE EN.
What parts can replace 11977?
There are 6 known substitutes for 11977: 1650PL0658208, CHEERIOS, 10158765 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11977?
11977 is cataloged in the Federal Logistics Information System under NSN 5306-00-298-8640. 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: October 2026