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Technical Data Sheet
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4637517-18 — BOLT,TEE HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4637517-18: BOLT,TEE HEAD.

The BOLT,TEE HEAD is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE, head_style: ROUND W/WRENCH FLATS CHAMFERED, head_height: 1.000 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 2.125 INCHES NOMINAL IN, thread_length: 0.688 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-361-3194, 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
4637517-18
NSN: 5306-01-361-3194
FSC: 5306 — Bolts
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING FEATURE
head_styleROUND W/WRENCH FLATS CHAMFERED
head_height1.000 INCHES NOMINAL IN
thread_class2A A
head_diameter2.125 INCHES NOMINAL IN
thread_length0.688 INCHES NOMINAL IN
fastener_length3.188 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.500 INCHES NOMINAL IN
nominal_thread_diameter0.313 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-01-361-3194
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4637517-18 · 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
•
HEAD HEIGHT: 1.000 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.188 INCHES NOMINAL IN
•
THREAD LENGTH: 0.688 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 CLA FED SPEC SINGLE MATERIAL RESPONSE FASTENER
•
NOMINAL THREAD DIAMETER: 0.313 INCHES IN
•
HEAD STYLE: ROUND W/WRENCH FLATS CHAMFERED
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT1.000 INCHES NOMINAL IN
FASTENER LENGTH3.188 INCHES NOMINAL IN
THREAD LENGTH0.688 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 CLA FED SPEC SINGLE MATERIAL RESPONSE FASTENER
NOMINAL THREAD DIAMETER0.313 INCHES IN
HEAD STYLEROUND W/WRENCH FLATS CHAMFERED
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.500 INCHES NOMINAL IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH18
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
412-4637517-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4637517-18?
4637517-18 is a BOLT,TEE HEAD.
What parts can replace 4637517-18?
There is 1 known substitute for 4637517-18: 412-4637517-18. Substitute compatibility should be verified for your specific system.
What is the NSN for 4637517-18?
4637517-18 is cataloged in the U.S. Government catalog under NSN 5306-01-361-3194. 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.