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Technical Data Sheet
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ST2120-056 — BOLT,TEE HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST2120-056: BOLT,TEE HEAD.

The BOLT,TEE HEAD is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, head_style: TEE NO. 6, head_height: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, head_length: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, thread_class: 3A A, chamfer_angle: 92.0 DEGREES NOMINAL.

This part is cataloged in the U.S. Government catalog under NSN 5306-01-063-5417, 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
ST2120-056
NSN: 5306-01-063-5417
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
head_styleTEE NO. 6
head_height0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
head_length0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
thread_class3A A
chamfer_angle92.0 DEGREES NOMINAL
thread_length0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
fastener_length1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
special_featuresEXTERNALLY RELIEVED BODY WITH DIA OF MIN 0.165 MAX 0.175
thread_directionRIGHT-HAND
width_between_flats0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
nominal_thread_diameter0.190 INCHES IN
NSN5306-01-063-5417
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST2120-056 · 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: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: PWA-S-7461 FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: TEE NO. 6
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD LENGTH: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
FASTENER LENGTH1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
THREAD LENGTH0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONPWA-S-7461 FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLETEE NO. 6
THREAD DIRECTIONRIGHT-HAND
HEAD LENGTH0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
SPECIAL FEATURESEXTERNALLY RELIEVED BODY WITH DIA OF MIN 0.165 MAX 0.175
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST2120-056?
ST2120-056 is a BOLT,TEE HEAD.
What is the NSN for ST2120-056?
ST2120-056 is cataloged in the U.S. Government catalog under NSN 5306-01-063-5417. 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.