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22K4NA — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

22K4NA: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.188 INCHES NOMINAL IN, head_diameter: 0.598 INCHES NOMINAL IN, thread_length: 0.750 INCHES NOMINAL IN, fastener_length: 2.313 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-216-7731, 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
22K4NA
NSN: 5306-00-216-7731
FSC: 5306 — Bolts
CAGE: 830Q4 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS-WRIGHT STEAM AND AIR SOLUTIONS DIV STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.188 INCHES NOMINAL IN
head_diameter0.598 INCHES NOMINAL IN
thread_length0.750 INCHES NOMINAL IN
fastener_length2.313 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.375 INCHES IN
first_diameter_from_head0.594 INCHES NOMINAL IN
third_diameter_from_head0.375 INCHES NOMINAL IN
thread_quantity_per_inch24
thread_series_designatorUNF
NSN5306-00-216-7731
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 22K4NA · 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
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.313 INCHES NOMINAL IN
•
THREAD LENGTH: 0.750 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.594 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.188 INCHES NOMINAL IN
FASTENER LENGTH2.313 INCHES NOMINAL IN
THREAD LENGTH0.750 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.594 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.250 INCHES NOMINAL IN
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY3
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
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 6
187681PC157Reference document
Same NSN cross-reference
Reference document — Secondary reference
188085PC157Reference document
Same NSN cross-reference
Reference document — Secondary reference
IR3000-30-157Reference document
Same NSN cross-reference
Reference document — Secondary reference
185417PC157Reference document
Same NSN cross-reference
Reference document — Secondary reference
1R3000-30-157Reference document
Same NSN cross-reference
Reference document — Secondary reference
D45872PP22K4NAReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 22K4NA?
22K4NA is a BOLT,EXTERNALLY RELIEVED BODY.
What parts can replace 22K4NA?
There are 6 known substitutes for 22K4NA: 187681PC157, 188085PC157, IR3000-30-157 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 22K4NA?
22K4NA is cataloged in the U.S. Government catalog under NSN 5306-00-216-7731. 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.