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Technical Data Sheet
PartsTable / COMPONENT / 151/21
151/21 ✓ 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 151/21 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-342-6542, 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
151/21
NSN: 5305-01-342-6542
FSC: 5305
CAGE: K7018 — WELLMAN GROUP (GBR)
SPECIFICATIONS
Part Number151/21
NSN5305-01-342-6542
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 151/21 · 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: 0.312 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
THREAD QUANTITY PER INCH: 32
•
THREAD CLASS: 2A A
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.312 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD QUANTITY PER INCH32
THREAD CLASS2A A
INTERNAL DRIVE STYLESLOT
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
SCREW MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
15121Interchangeable
interchangeable cross-reference
interchangeable
B94.9 1-72 UNF HS G H1Interchangeable
interchangeable cross-reference
interchangeable
1205E109Interchangeable
interchangeable cross-reference
interchangeable
C-110-A-8Interchangeable
interchangeable cross-reference
interchangeable
160-2004-01-03-00Interchangeable
interchangeable cross-reference
interchangeable
17-504-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 151/21?
151/21 is a 151/21.
What parts can replace 151/21?
There are 15 known substitutes for 151/21: 15121, B94.9 1-72 UNF HS G H1, 1205E109 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 151/21?
151/21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-342-6542. 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