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S1610-21171-5 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

S1610-21171-5: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, grip_length: 1.803 INCHES MINIMUM AND 1.823 INCHES MAXIMUM IN, head_height: 0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.767 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-514-8093, 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
S1610-21171-5
NSN: 5306-00-514-8093
FSC: 5306 — Bolts
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL
head_styleDOUBLE HEXAGON EXTENDED WASHER
grip_length1.803 INCHES MINIMUM AND 1.823 INCHES MAXIMUM IN
head_height0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
thread_class3A A
thread_length0.767 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
fastener_length2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM OVERALL
width_between_flats0.494 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
NSN5306-00-514-8093
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S1610-21171-5 · 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: 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.767 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
HEAD HEIGHT0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
FASTENER LENGTH2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD LENGTH0.767 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
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 2
5306H34-009-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VS2687Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S1610-21171-5?
S1610-21171-5 is a BOLT,MACHINE.
What parts can replace S1610-21171-5?
There are 2 known substitutes for S1610-21171-5: 5306H34-009-5, VS2687. Substitute compatibility should be verified for your specific system.
What is the NSN for S1610-21171-5?
S1610-21171-5 is cataloged in the U.S. Government catalog under NSN 5306-00-514-8093. 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.