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SII1183-6-18 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

SII1183-6-18: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: COBALT COMP MP-35-N OR COBALT ALLOY MP-159 OVERALL, head_style: SPLINE EXTENDED WASHER, grip_length: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN, head_height: 0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-352-2740, 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
SII1183-6-18
NSN: 5306-01-352-2740
FSC: 5306 — Bolts
CAGE: 06725 — SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY (USA)
SPECIFICATIONS
materialCOBALT COMP MP-35-N OR COBALT ALLOY MP-159 OVERALL
head_styleSPLINE EXTENDED WASHER
grip_length1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
head_height0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
thread_length0.707 INCHES NOMINAL IN
fastener_length1.817 INCHES MINIMUM AND 1.847 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
head_minor_diameter0.448 INCHES NOMINAL IN
nominal_thread_diameter0.375 INCHES IN
NSN5306-01-352-2740
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SII1183-6-18 · 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: 0.044 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.817 INCHES MINIMUM AND 1.847 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.707 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5844 ASSN STD 1ST MATERIAL RESPONSE AND AMS 5842 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.044 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
HEAD HEIGHT0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
FASTENER LENGTH1.817 INCHES MINIMUM AND 1.847 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN
THREAD LENGTH0.707 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5844 ASSN STD 1ST MATERIAL RESPONSE AND AMS 5842 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLESPLINE EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
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 3
PBF1574-6-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
03A309-6-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
84167-6-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 SII1183-6-18?
SII1183-6-18 is a BOLT,SHEAR.
What parts can replace SII1183-6-18?
There are 3 known substitutes for SII1183-6-18: PBF1574-6-18, 03A309-6-18, 84167-6-18. Substitute compatibility should be verified for your specific system.
What is the NSN for SII1183-6-18?
SII1183-6-18 is cataloged in the U.S. Government catalog under NSN 5306-01-352-2740. 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.