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ST2051-016 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST2051-016: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY UNS R56400 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, head_height: 0.279 INCHES MINIMUM AND 0.299 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.398 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN, fastener_length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-396-1556, 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
ST2051-016
NSN: 5306-01-396-1556
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R56400 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
head_height0.279 INCHES MINIMUM AND 0.299 INCHES MAXIMUM IN
thread_class3A A
thread_length0.398 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN
fastener_length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_between_flats0.250 INCHES NOMINAL IN
end_item_identificationF-100/200/220 ENGINE
nominal_thread_diameter0.190 INCHES IN
extended_washer_diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_quantity_per_inch32
NSN5306-01-396-1556
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST2051-016 · 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
•
EXTENDED WASHER THICKNESS: 0.085 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.279 INCHES MINIMUM AND 0.299 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.398 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 7461 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON W/HOLE
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.085 INCHES NOMINAL IN
HEAD HEIGHT0.279 INCHES MINIMUM AND 0.299 INCHES MAXIMUM IN
FASTENER LENGTH0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
THREAD LENGTH0.398 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 7461 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

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 ST2051-016?
ST2051-016 is a BOLT,MACHINE.
What is the NSN for ST2051-016?
ST2051-016 is cataloged in the U.S. Government catalog under NSN 5306-01-396-1556. 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.