PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 318272-54
318272-54 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL, head_style: HEXAGON, head_height: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.750 INCHES MAXIMUM IN, fastener_length: 1.750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-226-9229, 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
318272-54
NSN: 5305-00-226-9229
FSC: 5305
CAGE: 36090 — LOCKHEED MARTIN LIBRASCOPE CORPORATION (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
head_styleHEXAGON
head_height0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
thread_class2A A
thread_length1.750 INCHES MAXIMUM IN
fastener_length1.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch9
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationQQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5305-00-226-9229
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 318272-54 · 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
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
THREAD LENGTH: 1.750 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH1.750 INCHES NOMINAL IN
WIDTH BETWEEN FLATS1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
HEAD HEIGHT0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
THREAD LENGTH1.750 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH9
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
5305PL0731560Interchangeable
interchangeable cross-reference
interchangeable
5592959Interchangeable
interchangeable cross-reference
interchangeable
410-63Interchangeable
interchangeable cross-reference
interchangeable
FFS85TYPE11STYLE10PInterchangeable
Same NIIN cross-reference
interchangeable
MS35311-208Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 318272-54?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 318272-54?
318272-54 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 318272-54?
There are 5 known substitutes for 318272-54: 5305PL0731560, 5592959, 410-63 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 318272-54?
318272-54 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-226-9229. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 318272-54

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026