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PartsTable / COMPONENT / 175-220
175-220 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1040 OVERALL, head_style: HEXAGON, head_height: 0.234 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.917 INCHES NOMINAL IN, fastener_length: 2.000 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 5305-01-193-9601, 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
175-220
NSN: 5305-01-193-9601
FSC: 5305
CAGE: 72741 — DORMAN PRODUCTS, INC. DBA DORMAN (USA)
SPECIFICATIONS
materialSTEEL COMP 1040 OVERALL
head_styleHEXAGON
head_height0.234 INCHES NOMINAL IN
thread_class2A A
thread_length1.917 INCHES NOMINAL IN
fastener_length2.000 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentZINC AND DICHROMATE OVERALL
width_between_flats0.562 INCHES NOMINAL IN
nominal_thread_diameter0.375 INCHES IN
minimum_tensile_strength120000 POUNDS PER SQUARE INCH LBS
NSN5305-01-193-9601
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 175-220 · 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
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.000 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.234 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNF
•
SURFACE TREATMENT: ZINC AND DICHROMATE OVERALL
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL COMP 1040 OVERALL
•
THREAD QUANTITY PER INCH: 24
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
FASTENER LENGTH2.000 INCHES NOMINAL IN
HEAD HEIGHT0.234 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
SURFACE TREATMENTZINC AND DICHROMATE OVERALL
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 1040 OVERALL
THREAD QUANTITY PER INCH24
THREAD CLASS2A A
THREAD LENGTH1.917 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
SP666BGInterchangeable
interchangeable cross-reference
interchangeable
A-A-438Interchangeable
interchangeable cross-reference
interchangeable
9072-20Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 175-220?
175-220 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 175-220?
There are 3 known substitutes for 175-220: SP666BG, A-A-438, 9072-20. Substitute compatibility should be verified for your specific system.
What is the NSN for 175-220?
175-220 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-193-9601. 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