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1621174 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1621174: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: HEXAGON, thread_class: 2A A, shoulder_shape: HEXAGONAL TOP OF HEAD, width_between_flats: 1.494 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN, nominal_thread_diameter: 0.750 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-333-7163, 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
1621174
NSN: 5306-01-333-7163
FSC: 5306 — Bolts
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleHEXAGON
thread_class2A A
shoulder_shapeHEXAGONAL TOP OF HEAD
width_between_flats1.494 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch10
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5306-01-333-7163
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1621174 · 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
•
SHOULDER SHAPE: HEXAGONAL TOP OF HEAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: HEXAGON
•
WIDTH BETWEEN FLATS: 1.494 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 10
•
MATERIAL: STEEL COMP 303 OVERALL
TECHNICAL CHARACTERISTICS
SHOULDER SHAPEHEXAGONAL TOP OF HEAD
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEHEXAGON
WIDTH BETWEEN FLATS1.494 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH10
MATERIALSTEEL COMP 303 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
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
5306PL0971250Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1621174?
1621174 is a BOLT,SHOULDER.
What parts can replace 1621174?
There is 1 known substitute for 1621174: 5306PL0971250. Substitute compatibility should be verified for your specific system.
What is the NSN for 1621174?
1621174 is cataloged in the U.S. Government catalog under NSN 5306-01-333-7163. 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.