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Technical Data Sheet
PartsTable / COMPONENT / 99-2170
99-2170 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The INSERT,SCREW THREAD is a the manufacturer industrial component. Key specifications include length: 0.438 INCHES NOMINAL IN, material: STEEL OVERALL, insert_size: 0.375-16 NC 3B, style_designator: KEYLOCK, surface_treatment: CADMIUM OVERALL, width_across_flats: 0.375 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-550-9581, 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
99-2170
NSN: 5325-00-550-9581
FSC: 5325
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
length0.438 INCHES NOMINAL IN
materialSTEEL OVERALL
insert_size0.375-16 NC 3B
style_designatorKEYLOCK
surface_treatmentCADMIUM OVERALL
width_across_flats0.375 INCHES NOMINAL IN
material_document_and_classificationQQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
top_portion_unthreaded_outside_length0.045 INCHES NOMINAL IN
top_unthreaded_portion_outside_diameter0.292 INCHES NOMINAL IN
NSN5325-00-550-9581
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 99-2170 · 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
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
STYLE DESIGNATOR: KEYLOCK
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
INSERT SIZE: 0.375-16 NC 3B
•
TOP PORTION UNTHREADED OUTSIDE LENGTH: 0.045 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.375 INCHES NOMINAL IN
•
TOP UNTHREADED PORTION OUTSIDE DIAMETER: 0.292 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
STYLE DESIGNATORKEYLOCK
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
INSERT SIZE0.375-16 NC 3B
TOP PORTION UNTHREADED OUTSIDE LENGTH0.045 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.375 INCHES NOMINAL IN
TOP UNTHREADED PORTION OUTSIDE DIAMETER0.292 INCHES NOMINAL IN
LENGTH0.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
24617Interchangeable
interchangeable cross-reference
interchangeable
4010-906743Interchangeable
interchangeable cross-reference
interchangeable
90300Interchangeable
interchangeable cross-reference
interchangeable
6515NCM116693Interchangeable
interchangeable cross-reference
interchangeable
933B-4CS0437Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 99-2170?
99-2170 is a INSERT,SCREW THREAD.
What parts can replace 99-2170?
There are 5 known substitutes for 99-2170: 24617, 4010-906743, 90300 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 99-2170?
99-2170 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-550-9581. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026