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Technical Data Sheet
PartsTable / COMPONENT / 144 ITEM 21
144 ITEM 21 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, surface_finish: 125.0 MICROINCHES BOTH ENDS, first_end_style: SQUARE, pin_overall_length: 0.875 INCHES NOMINAL IN, first_hole_diameter: 0.047 INCHES NOMINAL IN, pin_overall_diameter: 0.1240 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM 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 5315-01-090-9353, 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
144 ITEM 21
NSN: 5315-01-090-9353
FSC: 5315
CAGE: K7018 — WELLMAN GROUP (GBR)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
surface_finish125.0 MICROINCHES BOTH ENDS
first_end_styleSQUARE
pin_overall_length0.875 INCHES NOMINAL IN
first_hole_diameter0.047 INCHES NOMINAL IN
pin_overall_diameter0.1240 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
second_hole_diameter0.047 INCHES NOMINAL IN
hole_arrangement_styleBOTH END DRILLED
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
center_to_center_distance_between_holes0.625 INCHES NOMINAL IN
distance_from_centerline_of_hole_to_end_of_pin0.125 INCHES NOMINAL IN
NSN5315-01-090-9353
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 144 ITEM 21 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PIN OVERALL LENGTH: 0.875 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
FIRST HOLE DIAMETER: 0.047 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 0.1240 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
•
SECOND HOLE DIAMETER: 0.047 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 304 OVERALL
•
SURFACE FINISH: 125.0 MICROINCHES BOTH ENDS
TECHNICAL CHARACTERISTICS (FLIS)
PIN OVERALL LENGTH0.875 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
FIRST HOLE DIAMETER0.047 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.1240 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
SECOND HOLE DIAMETER0.047 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 304 OVERALL
SURFACE FINISH125.0 MICROINCHES BOTH ENDS
FIRST END STYLESQUARE
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
16117Interchangeable
interchangeable cross-reference
interchangeable
FFS85TYPE2STYLE10PInterchangeable
interchangeable cross-reference
interchangeable
26946Interchangeable
interchangeable cross-reference
interchangeable
1-4 421Interchangeable
interchangeable cross-reference
interchangeable
421-4Interchangeable
interchangeable cross-reference
interchangeable
100R1 TYAT SZ4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 144 ITEM 21?
144 ITEM 21 is a PIN,STRAIGHT,HEADLESS.
What parts can replace 144 ITEM 21?
There are 14 known substitutes for 144 ITEM 21: 16117, FFS85TYPE2STYLE10P, 26946 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 144 ITEM 21?
144 ITEM 21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-090-9353. 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