PartsTable
Technical Data Sheet
Download PDF

ST21900028-101 — NUT,PLAIN,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

ST21900028-101: NUT,PLAIN,CLINCH.

The NUT,PLAIN,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: CLINCH, nut_height: 0.112 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), pilot_diameter: 0.197 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-793-8167, 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
ST21900028-101
NSN: 5310-00-793-8167
FSC: 5310 — Nuts and Washers
CAGE: 81395 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. DBA BAE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleCLINCH
nut_height0.112 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.197 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.250 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES IN
thread_quantity_per_inch40
NSN5310-00-793-8167
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ST21900028-101 · 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
•
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
PILOT DIAMETER: 0.197 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.112 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NUT STYLE: CLINCH
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.112 INCHES IN
PILOT DIAMETER0.197 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
NUT HEIGHT0.112 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLECLINCH
THREAD CLASS2B
THREAD QUANTITY PER INCH40
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
RCN44HE(050)-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
2JC2843H38Reference 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
Ready to buy ST21900028-101?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is ST21900028-101?
ST21900028-101 is a NUT,PLAIN,CLINCH.
What parts can replace ST21900028-101?
There are 2 known substitutes for ST21900028-101: RCN44HE(050)-2, 2JC2843H38. Substitute compatibility should be verified for your specific system.
What is the NSN for ST21900028-101?
ST21900028-101 is cataloged in the U.S. Government catalog under NSN 5310-00-793-8167. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — ST21900028-101

✓ 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.