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2171053 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2171053: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 9.594 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.922 INCHES NOMINAL IN, fastener_length: 11.000 INCHES NOMINAL IN, special_features: SPECIAL DESIGNED HEAD,3/4 IN. THICK,PORTION OF HEAD MACHINED TO FIT CONTOUR OF CONNECTING ROD IN.

This part is cataloged in the U.S. Government catalog under NSN 5306-01-117-9741, 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
2171053
NSN: 5306-01-117-9741
FSC: 5306 — Bolts
CAGE: 50024 — COLTEC INDUSTRIES INC DBA FAIRBANKS MORSE ENGINE FM/ALCO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length9.594 INCHES NOMINAL IN
thread_class3A A
thread_length0.922 INCHES NOMINAL IN
fastener_length11.000 INCHES NOMINAL IN
special_featuresSPECIAL DESIGNED HEAD,3/4 IN. THICK,PORTION OF HEAD MACHINED TO FIT CONTOUR OF CONNECTING ROD IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch14
thread_series_designatorUNF
NSN5306-01-117-9741
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2171053 · 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: 11.000 INCHES NOMINAL IN
•
THREAD LENGTH: 0.922 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.875 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 9.594 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 14
TECHNICAL CHARACTERISTICS
FASTENER LENGTH11.000 INCHES NOMINAL IN
THREAD LENGTH0.922 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.875 INCHES IN
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH9.594 INCHES NOMINAL IN
SPECIAL FEATURESSPECIAL DESIGNED HEAD,3/4 IN. THICK,PORTION OF HEAD MACHINED TO FIT CONTOUR OF CONNECTING ROD IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH14
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF
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
DRP-16110 PC 13Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 2171053?
2171053 is a BOLT,CLOSE TOLERANCE.
What parts can replace 2171053?
There is 1 known substitute for 2171053: DRP-16110 PC 13. Substitute compatibility should be verified for your specific system.
What is the NSN for 2171053?
2171053 is cataloged in the U.S. Government catalog under NSN 5306-01-117-9741. 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.